Spin-lattice relaxation time of ferromagnetic gadolinium determined with time-resolved spin-polarized photoemission, Physical Review Letters, vol.67, issue.23, p.3314, 1991. ,
DOI : 10.1103/PhysRevLett.67.3314
Spin-lattice relaxation in ferromagnets studied by time-resolved spin-polarized photoemission, Physical Review B, vol.46, issue.9, p.5280, 1992. ,
DOI : 10.1103/PhysRevB.46.5280
Simple theory for spin-lattice relaxation in metallic rare-earth ferromagnets, Physical Review B, vol.53, issue.6, p.3422, 1996. ,
DOI : 10.1103/PhysRevB.53.3422
Ultrafast Spin Dynamics in Ferromagnetic Nickel, Physical Review Letters, vol.76, issue.22, p.4250, 1996. ,
DOI : 10.1103/PhysRevLett.76.4250
Nonequilibrium Magnetization Dynamics of Nickel, Physical Review Letters, vol.78, issue.25, p.4861, 1997. ,
DOI : 10.1103/PhysRevLett.78.4861
Ultrafast Spin Dynamics of Ferromagnetic Thin Films Observed by fs Spin-Resolved Two-Photon Photoemission, Physical Review Letters, vol.79, issue.25, p.5146, 1997. ,
DOI : 10.1103/PhysRevLett.79.5146
alloy films: A magnetic phase transition in the femtosecond time scale, Physical Review B, vol.58, issue.18, p.12134, 1998. ,
DOI : 10.1103/PhysRevB.58.12134
Ultrafast electron and magnetization dynamics of thin Ni and Co films on Cu(001) observed by time-resolved SHG, Applied Physics B: Lasers and Optics, vol.68, issue.3, p.511, 1999. ,
DOI : 10.1007/s003400050658
Magnetization dynamics of Ni and Co films on Cu(001) and of bulk nickel surfaces, Physical Review B, vol.59, issue.10, p.6608, 1999. ,
DOI : 10.1103/PhysRevB.59.R6608
Ultrafast Magneto-Optics in Nickel: Magnetism or Optics?, Physical Review Letters, vol.85, issue.4, p.844, 2000. ,
DOI : 10.1103/PhysRevLett.85.844
Experimental access to femtosecond spin dynamics, Journal of Physics: Condensed Matter, vol.15, issue.5, p.723, 2003. ,
DOI : 10.1088/0953-8984/15/5/324
Time-resolved magnetization-induced second-harmonic generation from the Ni(110) surface, Physical Review B, vol.61, issue.21, p.14716, 2000. ,
DOI : 10.1103/PhysRevB.61.14716
Magneto-optics in the Ultrafast Regime: Thermalization of Spin Populations in Ferromagnetic Films, Physical Review Letters, vol.89, issue.1, p.17401, 2002. ,
DOI : 10.1103/PhysRevLett.89.017401
Coherent terahertz emission from ferromagnetic films excited by femtosecond laser pulses, Applied Physics Letters, vol.84, issue.18, p.3465, 2004. ,
DOI : 10.1063/1.1737467
Spin-Flip Processes and Ultrafast Magnetization Dynamics in Co: Unifying the Microscopic and Macroscopic View of Femtosecond Magnetism, Physical Review Letters, vol.97, issue.17, p.177201, 2006. ,
DOI : 10.1103/PhysRevLett.97.177201
Femtosecond modification of electron localization and transfer of angular momentum in nickel, Nature Materials, vol.92, issue.10, p.740, 2007. ,
DOI : 10.1038/nmat1985
Laser-Induced Ultrafast Demagnetization in Ferromagnetic Metals, Physical Review Letters, vol.85, issue.14, p.3025, 2000. ,
DOI : 10.1103/PhysRevLett.85.3025
Ultrafast spin dynamics in nickel, Physical Review B, vol.58, issue.10, p.5920, 1998. ,
DOI : 10.1103/PhysRevB.58.R5920
« Laser-induced magnetization dynamics » in Topics of Applied Physics: Spin Dynamics in Confined Magnetic Structures II ,
-Matrix Theory, Physical Review Letters, vol.93, issue.9, p.96401, 2004. ,
DOI : 10.1103/PhysRevLett.93.096401
URL : https://hal.archives-ouvertes.fr/hal-00749045
Unifying Ultrafast Magnetization Dynamics, Physical Review Letters, vol.95, issue.26, p.267207, 2005. ,
DOI : 10.1103/PhysRevLett.95.267207
Microscopic model for femtosecond magnetization dynamics, Journal of Magnetism and Magnetic Materials, vol.286, p.271, 2005. ,
DOI : 10.1016/j.jmmm.2004.09.079
Ultrafast Time Resolved Photoinduced Magnetization Rotation in a Ferromagnetic/Antiferromagnetic Exchange Coupled System, Physical Review Letters, vol.82, issue.18, p.3705, 1999. ,
DOI : 10.1103/PhysRevLett.82.3705
All-Optical Probe of Coherent Spin Waves, Physical Review Letters, vol.88, issue.22, p.227201, 2002. ,
DOI : 10.1103/PhysRevLett.88.227201
Ultrafast magnetization dynamics in ferromagnetic cobalt: The role of the anisotropy, Chemical Physics, vol.318, issue.1-2, p.137, 2005. ,
DOI : 10.1016/j.chemphys.2005.06.016
Ultrafast non-thermal control of magnetization by instantaneous photomagnetic pulses, Nature, vol.57, issue.7042, p.655, 2005. ,
DOI : 10.1038/nature01938
Switching of magnetization by nonlinear resonance studied in single nanoparticles, Nature Materials, vol.2, issue.8, pp.524-527, 2003. ,
DOI : 10.1038/nmat946
URL : https://hal.archives-ouvertes.fr/hal-00022925
Thermal Fluctuations of a Single???Domain Particle, Journal of Applied Physics, vol.34, issue.4, p.1319, 1963. ,
DOI : 10.1063/1.1729489
Spin dynamics in confined magnetic structures Topics New York) PP, pp.245-290, 2002. ,
« Experimental micromagnetic dynamics: ultrafast magnetization reversal using time resolved scanning Kerr effect microscopy, 2001. ,
On damped gyromagnetic precession, IEEE Transactions on Magnetics, vol.23, issue.4 ,
DOI : 10.1109/TMAG.1987.1065181
- and Ferromagnetic Resonance, Physical Review, vol.93, issue.1, p.72, 1954. ,
DOI : 10.1103/PhysRev.93.72
Thermal Fluctuations of a Single???Domain Particle, Journal of Applied Physics, vol.34, issue.4, p.1319, 1963. ,
DOI : 10.1063/1.1729489
Generalized equation of motion for a ferromagnet, Physica A: Statistical Mechanics and its Applications, vol.172, issue.3, pp.470-491, 1990. ,
DOI : 10.1016/0378-4371(91)90395-S
Relaxational Behavior of Fine Magnetic Particles, Journal of Applied Physics, vol.30, issue.4, p.130, 1959. ,
DOI : 10.1063/1.2185851
Thermal Fluctuations of a Single-Domain Particle, Physical Review, vol.130, issue.5, p.1677, 1963. ,
DOI : 10.1103/PhysRev.130.1677
Thermal fluctuation of fine ferromagnetic particles, IEEE Transactions on Magnetics, vol.15, issue.5, p.1196 ,
DOI : 10.1109/TMAG.1979.1060329
Effect of an oblique magnetic field on the superparamagnetic relaxation time. II. Influence of the gyromagnetic term, Physical Review B, vol.58, issue.6, p.3249, 1998. ,
DOI : 10.1103/PhysRevB.58.3249
Competitive effects of dipolar interactions and a bias magnetic field on the magnetic relaxation times of Co clusters, Journal of Applied Physics, vol.93, issue.10, p.7032, 2003. ,
DOI : 10.1063/1.1557411
Advances in Chemical Physics ,
«Quantum Theory of Magnetism ». 3 rd Edition, Springer series in Solid- State Sciences, vol.32, 2007. ,
Zur Theorie des Ferromagnetismus, Zeitschrift f???r Physik, vol.49, issue.9-10, p.619, 1928. ,
DOI : 10.1007/BF01328601
Temperature modulation of the optical transitions involving the Fermi surface in Ag: Theory, Physical Review B, vol.10, issue.2, p.474, 1974. ,
DOI : 10.1103/PhysRevB.10.474
Direct measurement of nonequilibrium electron-energy distributions in subpicosecond laser-heated gold films, Physical Review Letters, vol.68, issue.18, p.2834, 1992. ,
DOI : 10.1103/PhysRevLett.68.2834
« Laser-induced demagnetization Femtomagnetism, a new frontier?» in Topics of Applied Physics : Spin Dynamics in Confine New York) PP, pp.245-290, 2002. ,
Ultrafast spin dynamics in nickel, Physical Review B, vol.58, issue.10, p.5920, 1998. ,
DOI : 10.1103/PhysRevB.58.R5920
Laser-Induced Ultrafast Demagnetization in Ferromagnetic Metals, Physical Review Letters, vol.85, issue.14, p.3025, 2000. ,
DOI : 10.1103/PhysRevLett.85.3025
Electronic Quasiparticle Renormalization on the Spin Wave Energy Scale, Physical Review Letters, vol.92, issue.9, p.97205, 2004. ,
DOI : 10.1103/PhysRevLett.92.097205
-Matrix Theory, Physical Review Letters, vol.93, issue.9, p.96401, 2004. ,
DOI : 10.1103/PhysRevLett.93.096401
URL : https://hal.archives-ouvertes.fr/hal-00749045
Ultrafast Time Resolved Photoinduced Magnetization Rotation in a Ferromagnetic/Antiferromagnetic Exchange Coupled System, Physical Review Letters, vol.82, issue.18, p.3705, 1999. ,
DOI : 10.1103/PhysRevLett.82.3705
All-Optical Probe of Coherent Spin Waves, Physical Review Letters, vol.88, issue.22, p.227201, 2002. ,
DOI : 10.1103/PhysRevLett.88.227201
Ultrafast magnetization dynamics in ferromagnetic cobalt: The role of the anisotropy, Chemical Physics, vol.318, issue.1-2, p.137, 2005. ,
DOI : 10.1016/j.chemphys.2005.06.016
« The Physical Principles of Magnetism, Phys. Rev. Lett, vol.85, p.844, 2000. ,
« Propriétés optiques de marqueurs fluorescents d'intérêt biologique en interaction avec leur environnement : étude par spectroscopie femtoseconde, Thèse de doctorat ULP, 2004. ,
Femtosecond Spectrotemporal Magneto-optics, Physical Review Letters, vol.93, issue.7, p.77401, 2004. ,
DOI : 10.1103/PhysRevLett.93.077401
« The Principles of Nonlinear Optics, 1984. ,
« The Supercontinuum Laser Source, 1989. ,
Cours de DEA : « Propagation linéaire et non-linéaire d'une impulsion ,
Ultrafast Spin Dynamics in Ferromagnetic Nickel, Physical Review Letters, vol.76, issue.22, p.4250, 1996. ,
DOI : 10.1103/PhysRevLett.76.4250
Evolution of the vibronic absorption spectrum in a molecule following impulsive excitation with a 6 fs optical pulse, Chemical Physics Letters, vol.160, issue.2, p.101, 1989. ,
DOI : 10.1016/0009-2614(89)87564-5
Optique non-linéaire. Ellipses, 1999. ,
Thermomodulation Spectra of Al, Au, and Cu, Physical Review B, vol.5, issue.10, p.3883, 1972. ,
DOI : 10.1103/PhysRevB.5.3883
Magneto-optics in the Ultrafast Regime: Thermalization of Spin Populations in Ferromagnetic Films, Physical Review Letters, vol.89, issue.1, p.17401, 2002. ,
DOI : 10.1103/PhysRevLett.89.017401
« Etude statique et dynamique du renversement d'aimantation de petits objets, 2003. ,
«Elaboration par im la silice et modifications de leurs propriétés sous irradiation d'électrons et d'io énergie, Thèse de doctorat ULP, 2003. ,
« Elaboration, caractérisation et étude de la dynamique femtoseconde d l'aimantation des nanoparticules de c Stage de DEA, 2003. ,
« Etude statique et dynamique du renversement d'aimantation de petits objets d'anisotro, Phys. Rev. Lett, vol.89, p.17401, 2002. ,
« Trajectoire d'aimantation induite par des impulsions laser femtosecondes : Etude tridimensionnelle des effets d'anisotropie, Thèse de doctorat ULP, 2006. ,
Ultrafast magnetization dynamics in ferromagnetic cobalt: The role of the anisotropy, Chemical Physics, vol.318, issue.1-2, p.137, 2005. ,
DOI : 10.1016/j.chemphys.2005.06.016
« Magnetization dynamics in all-optical pump-probe experiments: spin wave modes and spin-current damping, 2006. ,
Inductive measurement of ultrafast magnetization dynamics in thin-film Permalloy, Journal of Applied Physics, vol.85, issue.11, p.7849, 1999. ,
DOI : 10.1063/1.370596
Spin Wave Dynamics and the Determination of Intrinsic Damping in Locally Excited Permalloy Thin Films, Physical Review Letters, vol.98, issue.8, p.87201, 2007. ,
DOI : 10.1103/PhysRevLett.98.087201
Thermal expansion of solids at low temperatures, Advances in Physics, vol.37, issue.4, p.609, 1980. ,
DOI : 10.1002/pssb.19660130138
« Coherent spin-lattice interaction in a ferromagnetic metallic film ». Ultrafast Phenomena XIII, page 398, Series in Chemical Physics, 2002. ,
Femtosecond magneto-optical Kerr microscopy, Optics Letters, vol.32, issue.8, pp.936-398, 2007. ,
DOI : 10.1364/OL.32.000936
URL : https://hal.archives-ouvertes.fr/hal-00212163
Fast magnetization reversal of GdFeCo induced by femtosecond laser pulses, Physical Review B, vol.65, issue.1, p.12413, 2001. ,
DOI : 10.1103/PhysRevB.65.012413
Spin Dynamics in Confined Magnetic Structures II Topics in Applied Physics, pp.213-252 ,
Nonthermal ultrafast optical control of the magnetization in garnet films, Physical Review B, vol.73, issue.1, p.14421, 2006. ,
DOI : 10.1103/PhysRevB.73.014421
Optically-Induced Magnetization Resulting from the Inverse Faraday Effect, Physical Review Letters, vol.15, issue.5, p.190, 1965. ,
DOI : 10.1103/PhysRevLett.15.190
« The magneto-optical Barnett effect and spin momentum Transfer ,
alloy films: A magnetic phase transition in the femtosecond time scale, Physical Review B, vol.58, issue.18, p.12134, 1998. ,
DOI : 10.1103/PhysRevB.58.12134
Relaxation Times for Magnetization Reversal in a High Coercivity Magnetic Thin Film, Physical Review Letters, vol.83, issue.23, p.4876, 1999. ,
DOI : 10.1103/PhysRevLett.83.4876
Spin Dynamics in Confined Magnetic Structures II. Topics in Applied Physics, 2003. ,
Real Space Trajectory of the Ultrafast Magnetization Dynamics in Ferromagnetic Metals, Physical Review Letters, vol.94, issue.23, p.237601, 2005. ,
DOI : 10.1103/PhysRevLett.94.237601
« Trajectoire d'aimantation induite par des impulsions laser femtosecondes : Etude tridimensionnelle d'anisotropie, Thèse de doctorat, université de Louis Pasteur (ULP), 2006. ,
« Elaboration par implantation ionique de nanoparticules de cobalt dans la silice et modifications de leurs propriétés sous irradiation d'électrons et d'ions de haute énergie, Thèse de doctorat ULP, 2003. ,
« The Physical Principles of Magnetism, 1965. ,
Advances in Chemical Physics, 1997. ,
Thermal Fluctuations of a Single-Domain Particle, Physical Review, vol.130, issue.5, p.1677, 1963. ,
DOI : 10.1103/PhysRev.130.1677
Theory of inelastic lifetimes of low-energy electrons in metals, Chemical Physics, vol.251, issue.1-3, p.1, 2000. ,
DOI : 10.1016/S0301-0104(99)00313-4
Time-resolved observation of electron-phonon relaxation in copper, Physical Review Letters, vol.58, issue.12, p.1212, 1987. ,
DOI : 10.1103/PhysRevLett.58.1212
Ultrafast Electronic Dynamics in Solid and Liquid Gallium Nanoparticles, Physical Review Letters, vol.78, issue.18, p.3575, 1997. ,
DOI : 10.1103/PhysRevLett.78.3575
Size dependence of the energy relaxation in silver nanoparticles embedded in dielectric matrices, Applied Physics Letters, vol.75, issue.24, p.3799, 1999. ,
DOI : 10.1063/1.125460
« Dynamique femtoseconde des populations électroniques dans des . Cíntora-González. « Structure et propriétés magnétiques de nanoparticules de métaux de transition élaborées par implantation ionique dans des verres de silice, Thèse de doctorat ULP, 2000. ,
Inductive measurement of ultrafast magnetization dynamics in thin-film Permalloy, Journal of Applied Physics, vol.85, issue.11, p.7849, 1999. ,
DOI : 10.1063/1.370596
Damped Precession of the Magnetization Vector of Superparamagnetic Nanoparticles Excited by Femtosecond Optical Pulses, Physical Review Letters, vol.97, issue.12, p.127401, 2006. ,
DOI : 10.1103/PhysRevLett.97.127401
URL : https://hal.archives-ouvertes.fr/hal-00204992
«Spin photonics microscopy: Writing nois, and J, Bigot. Phys. Rev. Lett, vol.76, p.4250, 1996. ,
Femtosecond magneto-optical Kerr microscopy, Optics Letters, vol.32, issue.8, pp.936-398, 2007. ,
DOI : 10.1364/OL.32.000936
URL : https://hal.archives-ouvertes.fr/hal-00212163
Ultrafast spin dynamics of an individual CoPt3 ferromagnetic dot, The European Physical Journal D, vol.318, issue.1-3, pp.251-253, 2007. ,
DOI : 10.1140/epjd/e2007-00120-y
URL : https://hal.archives-ouvertes.fr/hal-00212199
Larao and imaging magnetic domains with femtosecond laser pulses ,
Thermal Fluctuations of a Single???Domain Particle, Journal of Applied Physics, vol.34, issue.4, p.1319, 1963. ,
DOI : 10.1063/1.1729489
Hysteresis curve of magnetic nanocrystals monolayers: Influence of the structure, Journal of Applied Physics, vol.93, issue.12, p.10001, 2003. ,
DOI : 10.1063/1.1573343
Effect of the Structure of Cobalt Nanocrystal Organization on the Collective Magnetic Properties, The Journal of Physical Chemistry B, vol.107, issue.38, p.10333, 2003. ,
DOI : 10.1021/jp0301711
Size Distribution of Cobalt Nanocrystals: A Key Parameter in Formation of Columns and Labyrinths in Mesoscopic Structures, Advanced Materials, vol.69, issue.11, p.1424, 2005. ,
DOI : 10.1002/adma.200401559
Ultrafast precessional magnetization reversal by picosecond magnetic field pulse shaping, Nature, vol.19, issue.6897, p.509, 2002. ,
DOI : 10.1063/1.1470704
The ultimate speed of magnetic switching in granular recording media, Nature, vol.428, issue.6985, p.831, 2004. ,
DOI : 10.1038/nature02438
Magneto-optics in the Ultrafast Regime: Thermalization of Spin Populations in Ferromagnetic Films, Physical Review Letters, vol.89, issue.1, p.17401, 2002. ,
DOI : 10.1103/PhysRevLett.89.017401
Femtosecond magneto-optical Kerr microscopy, Optics Letters, vol.32, issue.8, pp.936-398, 2007. ,
DOI : 10.1364/OL.32.000936
URL : https://hal.archives-ouvertes.fr/hal-00212163
« Femtosecond imaging of the spin dynamics of CoPt nansostructures ». International Quantum Electronics Conference (IQEC) ,
Vom e resolved magnetooptical microscopy of individual ferromagnetic dots », 15 th International Conference on Ultrafast Phenomena, pp.662-664, 2006. ,
« Spin photonics m se ir, E. Beaurepaire. « Tim [2] Ultrafast ma omagnetic dots. 11 th Louis Néel Colloque, Mars 11 th -16 th, es. 26 Juin, 2006. ,
nous nous sommes intéressés à la dynamique de spins dans des plots ferromagnétiques individuels de CoPt 3 et de permalloy (le diamètre varie de 0.25 à 30 ?m) Le montage expérimental consiste en des mesures magnéto-optique Kerr pompe sonde en géométrie confocale (la résolution spatiale est 300 nm ; la résolution temporelle est 150 fs) Nous avons montré que la dynamique d'aimantation dépend fortement de la densité d'excitation laser notamment le temps de relaxation spin-réseau et la fréquence de précession. Nous avons également étudié l'expansion spatiale de la désaimantation dans un plot individuel. De plus, nous avons développé une technique d'imagerie résolue en temps permettant d'étudier le renversement d'aimantation dans des films et plots individuels de CoPt. Nous avons exploré l'effet des différents paramètres : intensité laser, champ magnétique appliqué, et la nature cristalline du substrat (alliage, multicouches) sur le renversement d'aimantation. Enfin, nous avons étudié par microscope à force magnétique la structure des domaines magnétiques induite par laser. Nous avons également étudié la dynamique cohérente d'aimantation de nanoparticules magnétiques (le diamètre moyen varie de 2 à 10 nm) excitées par des impulsions laser. L'analyse de la trajectoire d'aimantation dans les trois directions de l'espace (polaire, longitudinal, transverse) après l'excitation optique (> 120 fs) nous a permis de mettre en évidence la désaimantation ultrarapide (~ 200 fs), le mouvement gyroscopique de l'aimantation (précession et l'amortissement de l'aimantation) qui précède les fluctuations super-paramagnétiques, Nous avons exploré le rôle de l'anisotropie magnétique sur la réorientation initiale de l'aimantation et nous avons montré que le damping augmente avec la diminution de la taille de particules ,