G. A. Prinz, Magnetoelectronics, Science, vol.282, issue.5394, p.1660, 1998.
DOI : 10.1126/science.282.5394.1660

N. F. Mott, The Electrical Conductivity of Transition Metals, Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, vol.153, issue.880, p.699, 1936.
DOI : 10.1098/rspa.1936.0031

N. F. Mott, The Resistance and Thermoelectric Properties of the Transition Metals, Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, vol.156, issue.888, p.368, 1936.
DOI : 10.1098/rspa.1936.0154

A. Fert and I. A. Campbell, Two-Current Conduction in Nickel, Physical Review Letters, vol.21, issue.16, p.1190, 1968.
DOI : 10.1103/PhysRevLett.21.1190

A. Fert and I. Campbell, Electrical resistivity of ferromagnetic nickel and iron based alloys, Journal of Physics F: Metal Physics, vol.6, issue.5, p.849, 1976.
DOI : 10.1088/0305-4608/6/5/025

B. Loegel and F. Gautier, Origine de la resistivite dans le cobalt et ses alliages dilues, Journal of Physics and Chemistry of Solids, vol.32, issue.12, p.2723, 1971.
DOI : 10.1016/S0022-3697(71)80364-5

P. M. Tedrow and R. Meservey, Spin-Dependent Tunneling into Ferromagnetic Nickel, Physical Review Letters, vol.26, issue.4, p.192, 1971.
DOI : 10.1103/PhysRevLett.26.192

M. N. Baibich, J. M. Broto, A. Fert, F. N. Van-dau, F. Petroff et al., Giant Magnetoresistance of (001)Fe/(001)Cr Magnetic Superlattices, Physical Review Letters, vol.61, issue.21, p.2472, 1988.
DOI : 10.1103/PhysRevLett.61.2472

G. Binasch, P. Grünberg, F. Saurenbach, and W. Zinn, Enhanced magnetoresistance in layered magnetic structures with antiferromagnetic interlayer exchange, Physical Review B, vol.39, issue.7, p.4828, 1989.
DOI : 10.1103/PhysRevB.39.4828

J. M. Kikkawa and D. D. Awschalom, -Type GaAs, Physical Review Letters, vol.80, issue.19, p.4313, 1998.
DOI : 10.1103/PhysRevLett.80.4313

URL : https://hal.archives-ouvertes.fr/hal-00373297

R. I. Dzhioev, K. V. Kavokin, V. L. Korenev, M. V. Lazarev, B. Y. Meltser et al., -type GaAs, Physical Review B, vol.66, issue.24, p.245204, 2002.
DOI : 10.1103/PhysRevB.66.245204

URL : https://hal.archives-ouvertes.fr/hal-01393714

P. R. Hammar, B. R. Bennett, M. J. Yang, and M. Johnson, Observation of Spin Injection at a Ferromagnet-Semiconductor Interface, Physical Review Letters, vol.83, issue.1, p.203, 1999.
DOI : 10.1103/PhysRevLett.83.203

B. J. Van-wees, Comment on ???Observation of Spin Injection at a Ferromagnet-Semiconductor Interface???, Physical Review Letters, vol.84, issue.21, p.5023, 2000.
DOI : 10.1103/PhysRevLett.84.5023

F. G. Monzon, H. X. Tang, and M. L. Roukes, Magnetoelectronic Phenomena at a Ferromagnet-Semiconductor Interface, Physical Review Letters, vol.84, issue.21, p.5022, 2000.
DOI : 10.1103/PhysRevLett.84.5022

P. C. Van-son, H. Van-kempen, and P. Wyder, Boundary Resistance of the Ferromagnetic-Nonferromagnetic Metal Interface, Physical Review Letters, vol.58, issue.21, p.2271, 1987.
DOI : 10.1103/PhysRevLett.58.2271

M. Johnson and R. H. Silsbee, Interfacial charge-spin coupling: Injection and detection of spin magnetization in metals, Physical Review Letters, vol.55, issue.17, p.1790, 1985.
DOI : 10.1103/PhysRevLett.55.1790

F. J. Jedema, H. B. Heersche, A. T. Filip, J. J. Baselmans, and B. J. Van-wees, Electrical detection of spin precession in a metallic mesoscopic spin valve, Nature, vol.416, issue.6882, p.713, 2002.
DOI : 10.1038/416713a

A. T. Filip, B. H. Hoving, F. J. Jedema, B. J. Van-wees, B. Dutta et al., Experimental search for the electrical spin injection in a semiconductor, Physical Review B, vol.62, issue.15, p.9996, 2000.
DOI : 10.1103/PhysRevB.62.9996

G. Schmidt, D. Ferrand, L. W. Molenkamp, A. T. Filip, and B. J. Van-wees, Fundamental obstacle for electrical spin injection from a ferromagnetic metal into a diffusive semiconductor, Physical Review B, vol.62, issue.8, p.4790, 2000.
DOI : 10.1103/PhysRevB.62.R4790

L. Grenet, Injection de spins dans les semi-conducteurs, 2006.
URL : https://hal.archives-ouvertes.fr/tel-00508923

E. I. Rashba, Theory of electrical spin injection: Tunnel contacts as a solution of the conductivity mismatch problem, Physical Review B, vol.62, issue.24, p.16267, 2000.
DOI : 10.1103/PhysRevB.62.R16267

A. Fert and H. Jaffrès, Conditions for efficient spin injection from a ferromagnetic metal into a semiconductor, Physical Review B, vol.64, issue.18, p.184420, 2001.
DOI : 10.1103/PhysRevB.64.184420

H. J. Zhu, M. Ramsteiner, H. Kostial, M. Wassermeier, H. Schönherr et al., Room-Temperature Spin Injection from Fe into GaAs, Physical Review Letters, vol.87, issue.1, p.16601, 2001.
DOI : 10.1103/PhysRevLett.87.016601

S. A. Crooker, M. Furis, X. Lou, C. Adelmann, D. L. Smith et al., Imaging Spin Transport in Lateral Ferromagnet/Semiconductor Structures, Science, vol.309, issue.5744, p.2191, 2005.
DOI : 10.1126/science.1116865

X. Lou, C. Adelmann, M. Furis, S. A. Crooker, C. J. Palmstrøm et al., Electrical Detection of Spin Accumulation at a Ferromagnet-Semiconductor Interface, Physical Review Letters, vol.96, issue.17, p.176603, 2006.
DOI : 10.1103/PhysRevLett.96.176603

C. Ciuti, J. P. Mcguire, and L. J. Sham, Spin Polarization of Semiconductor Carriers by Reflection off a Ferromagnet, Physical Review Letters, vol.89, issue.15, p.156601, 2002.
DOI : 10.1103/PhysRevLett.89.156601

J. Mathon and A. Umerski, Theory of tunneling magnetoresistance of an epitaxial Fe/MgO/Fe(001) junction, Physical Review B, vol.63, issue.22, p.220403, 2001.
DOI : 10.1103/PhysRevB.63.220403

X. Jiang, R. Wang, R. M. Shelby, R. M. Macfarlane, S. R. Bank et al., Highly Spin-Polarized Room-Temperature Tunnel Injector for Semiconductor Spintronics using MgO(100), Physical Review Letters, vol.94, issue.5, p.56601, 2005.
DOI : 10.1103/PhysRevLett.94.056601

I. Appelbaum, B. Huang, and D. J. Monsma, Electronic measurement and control of spin transport in silicon, Nature, vol.80, issue.7142, p.295, 2007.
DOI : 10.1038/nature05803

S. P. Dash, S. Sharma, R. S. Patel, M. P. De-jong, and R. Jansen, Electrical creation of spin polarization in silicon at room temperature, Nature, vol.35, issue.7272, p.491, 2009.
DOI : 10.1038/nature08570

S. P. Dash, S. Sharma, J. C. Le-breton, J. Peiro, H. Jaffrès et al., Spin precession and inverted Hanle effect in a semiconductor near a finite-roughness ferromagnetic interface, Physical Review B, vol.84, issue.5, p.54410, 2011.
DOI : 10.1103/PhysRevB.84.054410

H. Ohno, Making Nonmagnetic Semiconductors Ferromagnetic, Science, vol.281, issue.5379, p.951, 1998.
DOI : 10.1126/science.281.5379.951

L. Chen, S. Yan, P. F. Xu, J. Lu, W. Z. Wang et al., Low-temperature magnetotransport behaviors of heavily Mn-doped (Ga,Mn)As films with high ferromagnetic transition temperature, Applied Physics Letters, vol.95, issue.18, p.182505, 2009.
DOI : 10.1063/1.3259821

K. Sato, H. Katayama-yoshida, and P. H. Dederichs, High Curie Temperature and Nano-Scale Spinodal Decomposition Phase in Dilute Magnetic Semiconductors, Japanese Journal of Applied Physics, vol.44, issue.No. 30, p.948, 2005.
DOI : 10.1143/JJAP.44.L948

S. Kuroda, N. Nishizawa, K. Takita, M. Mitome, Y. Bando et al., Origin and control of high-temperature ferromagnetism in semiconductors, Nature Materials, vol.63, issue.6, p.440, 2007.
DOI : 10.1038/nmat1910

A. Bonanni, A. Navarro-quezada, T. Li, M. Wegscheider, Z. Mat?j et al., Controlled Aggregation of Magnetic Ions in a Semiconductor: An Experimental Demonstration, Physical Review Letters, vol.101, issue.13, p.135502, 2008.
DOI : 10.1103/PhysRevLett.101.135502

P. N. Hai, S. Ohya, M. Tanaka, S. E. Barnes, and S. Maekawa, Electromotive force and huge magnetoresistance in magnetic tunnel junctions, Nature, vol.17, issue.7237, p.489, 2009.
DOI : 10.1038/nature07879

M. Jamet, A. Barski, T. Devillers, V. Poydenot, R. Dujardin et al., High-Curie-temperature ferromagnetism in self-organized Ge1???xMnx nanocolumns, Nature Materials, vol.11, issue.8, p.653, 2006.
DOI : 10.1038/nmat1686

B. T. Jonker, Y. D. Park, B. R. Bennett, H. D. Cheong, G. Kioseoglou et al., Robust electrical spin injection into a semiconductor heterostructure, Physical Review B, vol.62, issue.12, p.8180, 2000.
DOI : 10.1103/PhysRevB.62.8180

R. Mattana, J. George, H. Jaffrès, F. Nguyen-van-dau, A. Fert et al., -Type GaAs Quantum Well, Physical Review Letters, vol.90, issue.16, p.166601, 2003.
DOI : 10.1103/PhysRevLett.90.166601

URL : https://hal.archives-ouvertes.fr/hal-00656111

M. Ciorga, A. Einwanger, U. Wurstbauer, D. Schuh, W. Wegscheider et al., Electrical spin injection and detection in lateral all-semiconductor devices, Physical Review B, vol.79, issue.16, p.165321, 2009.
DOI : 10.1103/PhysRevB.79.165321

M. Kohda, Y. Ohno, K. Takamura, F. Matsukura, and H. Ohno, A Spin Esaki Diode, Japanese Journal of Applied Physics, vol.40, issue.Part 2, No. 12A, p.1274, 2001.
DOI : 10.1143/JJAP.40.L1274

Y. Yafet, Factor of Metallic Sodium, Physical Review, vol.85, issue.3, p.478, 1952.
DOI : 10.1103/PhysRev.85.478

G. Feher and E. A. Gere, Electron Spin Resonance Experiments on Donors in Silicon. II. Electron Spin Relaxation Effects, Physical Review, vol.114, issue.5, p.1245, 1959.
DOI : 10.1103/PhysRev.114.1245

J. L. Breton, S. Sharma, H. Saito, S. Yuasa, and R. Jansen, Thermal spin current from a ferromagnet to silicon by Seebeck spin tunnelling, Nature, vol.82, issue.7354, p.82, 2011.
DOI : 10.1038/nature10224

Y. A. Bychkov and E. I. Rashba, C: Solid State Phys, J. Phys, vol.17, p.6039, 1984.

J. Nitta, T. Akazaki, H. Takayanagi, and T. Enoki, As Heterostructure, Physical Review Letters, vol.78, issue.7, p.1335, 1997.
DOI : 10.1103/PhysRevLett.78.1335

J. Klein, Epitaktische Heterostrukturen aus dotierten Manganaten, 2001.

X. Liu and J. K. Furdyna, As dilute magnetic semiconductors, Journal of Physics: Condensed Matter, vol.18, issue.13, p.245, 2006.
DOI : 10.1088/0953-8984/18/13/R02

H. K. Henisch, Rectifying Semiconductor Contacts (Clarendon, 1957.

A. M. Cowley and S. M. Sze, Surface States and Barrier Height of Metal???Semiconductor Systems, Journal of Applied Physics, vol.36, issue.10, p.3212, 1965.
DOI : 10.1063/1.1702952

T. Nishimura, K. Kita, and A. Toriumi, A Significant Shift of Schottky Barrier Heights at Strongly Pinned Metal/Germanium Interface by Inserting an Ultra-Thin Insulating Film, Applied Physics Express, vol.1, p.51406, 2008.
DOI : 10.1143/APEX.1.051406

D. Lee, S. Raghunathan, R. J. Wilson, D. E. Nikonov, K. Saraswat et al., The influence of Fermi level pinning/depinning on the Schottky barrier height and contact resistance in Ge/CoFeB and Ge/MgO/CoFeB structures, Applied Physics Letters, vol.96, issue.5, p.52514, 2010.
DOI : 10.1063/1.3285163

W. E. Spicer, I. Lindau, P. Skeath, C. Y. Su, and P. Chye, Unified Mechanism for Schottky-Barrier Formation and III-V Oxide Interface States, Physical Review Letters, vol.44, issue.6, p.420, 1980.
DOI : 10.1103/PhysRevLett.44.420

K. Yamane, K. Hamaya, Y. Ando, Y. Enomoto, K. Yamamoto et al., Effect of atomically controlled interfaces on Fermi-level pinning at metal/Ge interfaces, Applied Physics Letters, vol.96, issue.16, p.162104, 2010.
DOI : 10.1063/1.3368701

A. V. Thathachary, K. N. Bhat, N. Bhat, and M. S. Hegde, Fermi level depinning at the germanium Schottky interface through sulfur passivation, Applied Physics Letters, vol.96, issue.15, p.152108, 2010.
DOI : 10.1063/1.3387760

B. Min, K. Motohashi, C. Lodder, and R. Jansen, Tunable spin-tunnel contacts to silicon using low-work-function ferromagnets, Nature Materials, vol.83, issue.10, p.817, 2006.
DOI : 10.1038/nmat1736

H. Saito, S. Watanabe, Y. Mineno, S. Sharma, R. Jansen et al., Electrical creation of spin accumulation in -type germanium, Solid State Communications, vol.151, issue.17, p.1159, 2011.
DOI : 10.1016/j.ssc.2011.05.010

M. Tran, H. Jaffrès, C. Deranlot, J. George, A. Fert et al., Enhancement of the Spin Accumulation at the Interface between a Spin-Polarized Tunnel Junction and a Semiconductor, Physical Review Letters, vol.102, issue.3, p.36601, 2009.
DOI : 10.1103/PhysRevLett.102.036601

C. Li, O. Van-'t-erve, and B. Jonker, Electrical injection and detection of spin accumulation in silicon at 500 K with magnetic metal/silicon dioxide contacts, Nature Communications, vol.2, p.245, 2011.
DOI : 10.1063/1.1310633

Y. Lu, J. Li, and I. Appelbaum, Spin-Polarized Transient Electron Trapping in Phosphorus-Doped Silicon, Physical Review Letters, vol.106, issue.21, p.217202, 2011.
DOI : 10.1103/PhysRevLett.106.217202

S. A. Crooker, E. S. Garlid, A. N. Chantis, D. L. Smith, K. S. Reddy et al., Bias-controlled sensitivity of ferromagnet/semiconductor electrical spin detectors, Physical Review B, vol.80, issue.4, p.41305, 2009.
DOI : 10.1103/PhysRevB.80.041305

T. Suzuki, T. Sasaki, T. Oikawa, M. Shiraishi, Y. Suzuki et al., Room-Temperature Electron Spin Transport in a Highly Doped Si Channel, Applied Physics Express, vol.4, issue.2, p.23003, 2011.
DOI : 10.1143/APEX.4.023003

K. Jeon, B. Min, H. Lee, I. J. Shin, C. Park et al., Single crystalline CoFe/MgO tunnel contact on nondegenerate Ge with a proper resistance-area product for efficient spin injection and detection, Applied Physics Letters, vol.97, issue.2, p.22105, 2010.
DOI : 10.1063/1.3454276

H. H. Woodbury and W. W. Tyler, Properties of Germanium Doped with Manganese, Physical Review, vol.100, issue.2, p.659, 1955.
DOI : 10.1103/PhysRev.100.659

T. B. Massalski, Binary Alloy Phase Diagrams, p.1964, 1990.

T. Ohoyama, K. Yasukochi, K. Kanematsu, and J. , Ge and its Magnetism, Journal of the Physical Society of Japan, vol.16, issue.2, p.352, 1961.
DOI : 10.1143/JPSJ.16.352

T. Ohba, N. Watanabe, and Y. Komura, at 295 and 116 K, Acta Crystallographica Section B Structural Science, vol.40, issue.4, p.351, 1984.
DOI : 10.1107/S0108768184002287

L. Castelliz, Kristallstruktur von Mn5Ge3 und einiger tern???rer Phasen mit zwei ???bergangselementen, Monatshefte f???r Chemie, vol.84, issue.4, p.765, 1953.
DOI : 10.1007/BF00902776

Y. D. Park, A. T. Hanbicki, S. C. Erwin, C. S. Hellberg, J. M. Sullivan et al., A Group-IV Ferromagnetic Semiconductor: MnxGe1-x, Science, vol.295, issue.5555, p.651, 2002.
DOI : 10.1126/science.1066348

N. Pinto, L. Morresi, M. Ficcadenti, R. Murri, F. D. Orazio et al., films, Physical Review B, vol.72, issue.16, p.165203, 2005.
DOI : 10.1103/PhysRevB.72.165203

URL : https://hal.archives-ouvertes.fr/halshs-00336555

N. Pinto, L. Morresi, R. Murri, F. D. Orazio, F. Lucari et al., Growth process and characterization of magnetic semiconductors based on GeMn alloy films, physica status solidi (c), vol.1, issue.7, p.1748, 2004.
DOI : 10.1002/pssc.200304409

S. Picozzi, L. Ottaviano, M. Passacantando, G. Profeta, A. Continenza et al., X-ray absorption spectroscopy in MnxGe1???x diluted magnetic semiconductor: Experiment and theory, Applied Physics Letters, vol.86, issue.6, p.62501, 2005.
DOI : 10.1063/1.1861127

L. Ottaviano, M. Passacantando, A. Verna, R. Gunnella, E. Principi et al., Direct structural evidences of Mn dilution in Ge, Journal of Applied Physics, vol.100, issue.6, p.63528, 2006.
DOI : 10.1063/1.2337388

L. Ottaviano, M. Passacantando, A. Verna, F. D. Amico, and R. Gunnella, Mn L2,3 x-ray absorption spectra of a diluted Mn???Ge alloy, Applied Physics Letters, vol.90, issue.24, p.242105, 2007.
DOI : 10.1063/1.2746063

R. B. Morgunov, A. I. Dmitriev, and O. L. Kazakova, Percolation ferromagnetism and spin waves in Ge:Mn thin films, Physical Review B, vol.80, issue.8, p.85205, 2009.
DOI : 10.1103/PhysRevB.80.085205

L. Ottaviano, A. Continenza, G. Profeta, G. Impellizzeri, A. Irrera et al., Room-temperature ferromagnetism in Mn-implanted amorphous Ge, Physical Review B, vol.83, issue.13, p.134426, 2011.
DOI : 10.1103/PhysRevB.83.134426

C. Zeng, Z. Zhang, K. Van-benthem, M. F. Chisholm, and H. H. Weitering, Optimal Doping Control of Magnetic Semiconductors via Subsurfactant Epitaxy, Physical Review Letters, vol.100, issue.6, p.66101, 2008.
DOI : 10.1103/PhysRevLett.100.066101

L. Morresi, J. Ayoub, N. Pinto, M. Ficcadenti, R. Murri et al., Formation of Mn5Ge3 nanoclusters in highly diluted MnxGe1???x alloys, Materials Science in Semiconductor Processing, vol.9, issue.4-5, p.836, 2006.
DOI : 10.1016/j.mssp.2006.08.056

L. Morresi, J. Ayoub, N. Pinto, M. Ficcadenti, R. Murri et al., Structural, magnetic and electronic transport properties of MnxGe1???x/Ge(001) films grown by MBE at 350??C, ISSN 0039-6028, international Conference on NANO-Structures Self-Assembling, International Conference on NANO-Structures Self-Assembling, p.2632, 2007.
DOI : 10.1016/j.susc.2006.11.077

P. D. Padova, J. Ayoub, I. Berbezier, J. Mariot, A. Taleb-ibrahimi et al., MnxGe1???x thin layers studied by TEM, X-ray absorption spectroscopy and SQUID magnetometry, Surface Science, vol.601, issue.13, p.2628, 2007.
DOI : 10.1016/j.susc.2006.11.076

C. Bihler, C. Jaeger, T. Vallaitis, M. Gjukic, M. S. Brandt et al., Structural and magnetic properties of Mn5Ge3 clusters in a dilute magnetic germanium matrix, Applied Physics Letters, vol.88, issue.11, p.112506, 2006.
DOI : 10.1063/1.2185448

R. T. Lechner, V. Hol´yhol´y, S. Ahlers, D. Bougeard, J. Stangl et al., Self-assembled Mn5Ge3 nanomagnets close to the surface and deep inside a Ge1???xMnx epilayer, Applied Physics Letters, vol.95, issue.2, p.23102, 2009.
DOI : 10.1063/1.3159827

S. Ahlers, D. Bougeard, N. Sircar, G. Abstreiter, A. Trampert et al., films: Precipitation of intermetallic nanomagnets, Physical Review B, vol.74, issue.21, p.214411, 2006.
DOI : 10.1103/PhysRevB.74.214411

D. Bougeard, S. Ahlers, A. Trampert, N. Sircar, and G. Abstreiter, Clustering in a Precipitate-Free GeMn Magnetic Semiconductor, Physical Review Letters, vol.97, issue.23, p.237202, 2006.
DOI : 10.1103/PhysRevLett.97.237202

M. Rovezzi, T. Devillers, E. Arras, F. Acapito, A. Barski et al., Atomic structure of Mn-rich nanocolumns probed by x-ray absorption spectroscopy, Applied Physics Letters, vol.92, issue.24, p.242510, 2008.
DOI : 10.1063/1.2949077

S. Tardif, S. Cherifi, M. Jamet, T. Devillers, A. Barski et al., Exchange bias in GeMn nanocolumns: The role of surface oxidation, Applied Physics Letters, vol.97, issue.6, p.62501, 2010.
DOI : 10.1063/1.3476343

URL : https://hal.archives-ouvertes.fr/hal-00510381

I. Yu, M. Jamet, T. Devillers, A. Barski, P. Bayle-guillemaud et al., Spinodal decomposition to control magnetotransport in (Ge,Mn) films, Physical Review B, vol.82, issue.3, p.35308, 2010.
DOI : 10.1103/PhysRevB.82.035308

URL : https://hal.archives-ouvertes.fr/hal-00999603

A. Jain, M. Jamet, A. Barski, T. Devillers, C. Porret et al., Investigation of magnetic anisotropy of (Ge,Mn) nanocolumns, Applied Physics Letters, vol.97, issue.20, p.202502, 2010.
DOI : 10.1063/1.3505501

A. P. Li, C. Zeng, K. Van-benthem, M. F. Chisholm, J. Shen et al., Dopant segregation and giant magnetoresistance in manganese-doped germanium, Physical Review B, vol.75, issue.20, p.201201, 2007.
DOI : 10.1103/PhysRevB.75.201201

F. Xiu, Y. Wang, K. Wong, Y. Zhou, X. Kou et al., MnGe magnetic nanocolumns and nanowells, Nanotechnology, vol.21, issue.25, p.255602, 2010.
DOI : 10.1088/0957-4484/21/25/255602

O. Kazakova, J. S. Kulkarni, J. D. Holmes, and S. O. Demokritov, nanowires, Physical Review B, vol.72, issue.9, p.94415, 2005.
DOI : 10.1103/PhysRevB.72.094415

J. X. Deng, Y. F. Tian, S. M. He, H. L. Bai, T. S. Xu et al., Strong anisotropy of magnetization and sign reversion of ordinary Hall coefficient in single crystal Ge1???xMnx magnetic semiconductor films, Applied Physics Letters, vol.95, issue.6, p.62513, 2009.
DOI : 10.1063/1.3206664

R. Morgunov, M. Farle, M. Passacantando, L. Ottaviano, and O. Kazakova, Electron spin resonance and microwave magnetoresistance in Ge:Mn thin films, Physical Review B, vol.78, issue.4, p.45206, 2008.
DOI : 10.1103/PhysRevB.78.045206

H. Suhl, Ferromagnetic Resonance in Nickel Ferrite Between One and Two Kilomegacycles, Physical Review, vol.97, issue.2, p.555, 1955.
DOI : 10.1103/PhysRev.97.555.2

M. Farle, Ferromagnetic resonance of ultrathin metallic layers, Reports on Progress in Physics, vol.61, issue.7, p.755, 1998.
DOI : 10.1088/0034-4885/61/7/001

M. Jamet, W. Wernsdorfer, C. Thirion, D. Mailly, V. Dupuis et al., Magnetic Anisotropy of a Single Cobalt Nanocluster, Physical Review Letters, vol.86, issue.20, p.4676, 2001.
DOI : 10.1103/PhysRevLett.86.4676

W. Cai and J. Wan, Facile synthesis of superparamagnetic magnetite nanoparticles in liquid polyols, Journal of Colloid and Interface Science, vol.305, issue.2, p.366, 2007.
DOI : 10.1016/j.jcis.2006.10.023

C. Zeng, S. C. Erwin, L. C. Feldman, A. P. Li, R. Jin et al., Epitaxial ferromagnetic Mn5Ge3 on Ge(111), Applied Physics Letters, vol.83, issue.24, p.5002, 2003.
DOI : 10.1063/1.1633684

Y. S. Dedkov, M. Holder, G. Mayer, M. Fonin, and A. B. Preobrajenski, Spin-resolved photoemission of a ferromagnetic Mn5Ge3(0001) epilayer on Ge(111), Journal of Applied Physics, vol.105, issue.7, p.73909, 2009.
DOI : 10.1063/1.3103336

L. Sangaletti, D. Ghidoni, S. Pagliara, A. Goldoni, A. Morgante et al., Electronic properties of the ordered metallic Mn:Ge(111) interface, Physical Review B, vol.72, issue.3, p.35434, 2005.
DOI : 10.1103/PhysRevB.72.035434

R. Gunnella, L. Morresi, N. Pinto, R. Murri, L. Ottaviano et al., Magnetization of epitaxial MnGe alloys on Ge(111) substrates, Surface Science, vol.577, issue.1, p.22, 2005.
DOI : 10.1016/j.susc.2004.12.021

C. Zeng, W. Zhu, S. C. Erwin, Z. Zhang, and H. H. Weitering, Initial stages of Mn adsorption on Ge(111), Physical Review B, vol.70, issue.20, p.205340, 2004.
DOI : 10.1103/PhysRevB.70.205340

S. Olive-mendez, A. Spiesser, L. Michez, V. L. Thanh, A. Glachant et al., Epitaxial growth of Mn5Ge3/Ge(111) heterostructures for spin injection, Thin Solid Films, vol.517, issue.1, p.191, 2008.
DOI : 10.1016/j.tsf.2008.08.090

URL : https://hal.archives-ouvertes.fr/hal-00386892

A. Spiesser, S. Olive-mendez, M. Dau, L. Michez, A. Watanabe et al., Effect of thickness on structural and magnetic properties of Mn5Ge3 films grown on Ge(111) by solid phase epitaxy, Thin Solid Films, vol.518, issue.6, p.113, 2010.
DOI : 10.1016/j.tsf.2009.10.067

URL : https://hal.archives-ouvertes.fr/hal-00475836

G. Srivastava, Theory of semiconductor surface reconstruction, Reports on Progress in Physics, vol.60, issue.5, p.561, 1997.
DOI : 10.1088/0034-4885/60/5/002

N. Almeleh and B. Goldstein, Electron Paramagnetic Resonance of Manganese in Gallium Arsenide, Physical Review, vol.128, issue.4, p.1568, 1962.
DOI : 10.1103/PhysRev.128.1568

V. Hol´yhol´y, R. T. Lechner, S. Ahlers, L. Horák, T. H. Metzger et al., layers, Physical Review B, vol.78, issue.14, p.144401, 2008.
DOI : 10.1103/PhysRevB.78.144401

T. C. Schulthess and W. H. Butler, Electronic structure and magnetic interactions in Mn doped semiconductors, Journal of Applied Physics, vol.89, issue.11, p.7021, 2001.
DOI : 10.1063/1.1359456

S. Sugahara, K. L. Lee, S. Yada, and M. Tanaka, Precipitation of Amorphous Ferromagnetic Semiconductor Phase in Epitaxially Grown Mn-Doped Ge Thin Films, Japanese Journal of Applied Physics, vol.44, issue.No. 48, p.1426, 2005.
DOI : 10.1143/JJAP.44.L1426

A. Stroppa, S. Picozzi, A. Continenza, and A. J. Freeman, Electronic structure and ferromagnetism of Mn-doped group-IV semiconductors, Physical Review B, vol.68, issue.15, p.155203, 2003.
DOI : 10.1103/PhysRevB.68.155203