Y. Imry and S. Ma, Random-Field Instability of the Ordered State of Continuous Symmetry, Physical Review Letters, vol.35, issue.21, p.1399, 1975.
DOI : 10.1103/PhysRevLett.35.1399

F. Brochard and P. G. De-gennes, Phase transitions of binary mixtures in random media, Journal de Physique Lettres, vol.44, issue.18, p.785, 1983.
DOI : 10.1051/jphyslet:019830044018078500
URL : https://hal.archives-ouvertes.fr/jpa-00232263

A. P. Wong and M. H. Chan, in aerogel, Physical Review Letters, vol.65, issue.20, p.2567, 1990.
DOI : 10.1103/PhysRevLett.65.2567

A. P. Wong, S. B. Kim, W. I. Goldburg, and M. H. Chan, in aerogel, Physical Review Letters, vol.70, issue.7, p.954, 1993.
DOI : 10.1103/PhysRevLett.70.954

C. Gabay, Transitions de Phase de l'Hélium dans les aérogels de silice, Thèse, 2001.

T. Lambert, Etude optique de la transition liquide-gaz de l'hélium confiné dans les aérogels de silice, Thèse, 2004.

F. Bonnet, Étude de la condensation et de l'évaporation de l'hélium dans les milieux poreux : Effets du confinement et du désordre, Thèse, 2009.

T. Herman, J. Day, and J. Beamish, Helium adsorption in silica aerogel near the liquid-vapor critical point, Physical Review B, vol.72, issue.18, p.184202, 2005.
DOI : 10.1103/PhysRevB.72.184202

E. Kierlik, P. A. Monson, M. L. Rosinberg, L. Sarkisov, and G. Tarjus, Capillary Condensation in Disordered Porous Materials: Hysteresis versus Equilibrium Behavior, Physical Review Letters, vol.87, issue.5, p.55701, 2001.
DOI : 10.1103/PhysRevLett.87.055701

J. P. Sethna, K. Dahmen, S. Kartha, J. A. Krumhansl, B. W. Roberts et al., Hysteresis and hierarchies: Dynamics of disorder-driven first-order phase transformations, Physical Review Letters, vol.70, issue.21, p.3347, 1993.
DOI : 10.1103/PhysRevLett.70.3347

F. Detcheverry, Condensation capillaire et transitions hors d'équilibre dans les milieux poreux désordonnés : l'exemple des aérogels de silice, Thèse de doctorat, 2005.

]. G. Jaeger, The Ehrenfest Classification of Phase Transitions: Introduction and Evolution, Archive for History of Exact Sciences, vol.53, issue.1, p.51, 1998.
DOI : 10.1007/s004070050021

E. Ising, Beitrag zur Theorie des Ferromagnetismus Zeitschrift fur Physik 31, 1925.
DOI : 10.1007/bf02980577

H. Barkhausen, Zwei mit hilfe der neuen verstärker entdeckte erscheinungen . Phys, 1919.

G. Durin and S. Zapperi, The Barkhausen Effect Bertotti et I. D. Mayergoyz, rédacteurs, The Science of Hysteresis, tome II, chapitre 3, pp.181-267, 2006.

J. R. Petta, M. B. Weissman, and G. Durin, Dependence of Barkhausen pattern reproducibility on hysteresis loop size, Physical Review E, vol.56, issue.3, p.2776, 1997.
DOI : 10.1103/PhysRevE.56.2776

J. P. Sethna, K. A. Dahmen, and C. R. Myers, Crackling noise, Nature, vol.81, issue.6825, p.242, 2001.
DOI : 10.1038/35065675

A. Amengual, L. Mañosa, F. Marco, C. Picornell, C. Segui et al., Systematic study of the martensitic transformation in a Cu-Zn-Al alloy. reversibility versus irreversibility via acoustic emission, Thermochimica Acta, vol.116, p.195, 1987.
DOI : 10.1016/0040-6031(87)88179-0

A. Berger, A. Inomata, J. S. Jiang, J. E. Pearson, and S. D. Bader, Experimental Observation of Disorder-Driven Hysteresis-Loop Criticality, Physical Review Letters, vol.85, issue.19, p.4176, 2000.
DOI : 10.1103/PhysRevLett.85.4176

O. Perkovi´cperkovi´c, K. A. Dahmen, and J. P. Sethna, Disorder-induced critical phenomena in hysteresis: Numerical scaling in three and higher dimensions, Physical Review B, vol.59, issue.9, p.6106, 1999.
DOI : 10.1103/PhysRevB.59.6106

J. Marcos, E. Vives, L. Mañosa, M. Acet, E. Duman et al., Disorder-induced critical phenomena in magnetically glassy Cu-Al-Mn alloys, Physical Review B, vol.67, issue.22, p.224406, 2003.
DOI : 10.1103/PhysRevB.67.224406

M. S. Pierce, R. G. Moore, L. B. Sorensen, S. D. Kevan, O. Hellwig et al., Quasistatic X-Ray Speckle Metrology of Microscopic Magnetic Return-Point Memory, Physical Review Letters, vol.90, issue.17, p.175502, 2003.
DOI : 10.1103/PhysRevLett.90.175502

M. S. Pierce, C. R. Buechler, L. B. Sorensen, J. J. Turner, S. D. Kevan et al., Disorder-Induced Microscopic Magnetic Memory, Physical Review Letters, vol.94, issue.1, p.17202, 2005.
DOI : 10.1103/PhysRevLett.94.017202

M. S. Pierce, C. R. Buechler, L. B. Sorensen, S. D. Kevan, E. A. Jagla et al., Disorder-induced magnetic memory: Experiments and theories, ?r???????????t????????, p.144406, 2007.
DOI : 10.1103/PhysRevB.75.144406

M. P. Lilly, P. T. Finley, and R. B. Hallock, Memory, congruence, and avalanche events in hysteretic capillary condensation, Physical Review Letters, vol.71, issue.25, p.4186, 1993.
DOI : 10.1103/PhysRevLett.71.4186

P. Meakin, Formation of Fractal Clusters and Networks by Irreversible Diffusion-Limited Aggregation, Physical Review Letters, vol.51, issue.13, p.1119, 1983.
DOI : 10.1103/PhysRevLett.51.1119

M. Kolb, R. Botet, and R. Jullien, Scaling of Kinetically Growing Clusters, Physical Review Letters, vol.51, issue.13, p.1123, 1983.
DOI : 10.1103/PhysRevLett.51.1123

F. Detcheverry, E. Kierlik, M. L. Rosinberg, and G. Tarjus, Local mean-field study of capillary condensation in silica aerogels, Physical Review E, vol.68, issue.6, p.61504, 2003.
DOI : 10.1103/PhysRevE.68.061504

F. Detcheverry, E. Kierlik, M. L. Rosinberg, and G. Tarjus, Mechanisms for Gas Adsorption and Desorption in Silica Aerogels:?? The Effect of Temperature, Langmuir, vol.20, issue.19, p.8006, 2004.
DOI : 10.1021/la0488506

F. Detcheverry, E. Kierlik, M. L. Rosinberg, and G. Tarjus, Helium condensation in aerogel: Avalanches and disorder-induced phase transition, Physical Review E, vol.72, issue.5
DOI : 10.1103/PhysRevE.72.051506

O. Perkovic, K. A. Dahmen, and J. P. Sethna, Disorder-Induced Critical Phenomena in Hysteresis : A Numerical Scaling Analysis, 1996.

V. D. Arp, R. D. Mccarty, and D. G. Friend, Thermophysical properties of helium-4 from 0.8 to 1500 K with pressures to, MPa. NIST Technical Note NIST, vol.1334, 1998.

J. F. Allen and H. Jones, New Phenomena Connected with Heat Flow in Helium II, Nature, vol.141, issue.3562, p.243, 1938.
DOI : 10.1038/141243a0

J. D. Reppy, Superfluid helium in porous media, Journal of Low Temperature Physics, vol.33, issue.8, p.205, 1992.
DOI : 10.1007/BF00114905

C. W. Kiewiet, H. E. Hall, and J. D. Reppy, Superfluid Density in Porous Vycor Glass, Physical Review Letters, vol.35, issue.19, p.1286, 1975.
DOI : 10.1103/PhysRevLett.35.1286

C. Gabay, F. Despetis, P. E. Wolf, and L. Puech, Measurements of helium density in aerogel near the liquid-vapor critical point, Journal of Low Temperature Physics, vol.121, issue.5/6, p.585, 2000.
DOI : 10.1023/A:1017511426955

C. Gabay, P. E. Wolf, and L. Puech, A very low-frequency pendulum for measurements of helium density in aerogel, Physica B: Condensed Matter, vol.284, issue.288, p.99, 2000.
DOI : 10.1016/S0921-4526(99)02072-4

T. Herman, J. Day, and J. Beamish, Deformation of silica aerogel during fluid adsorption, Physical Review B, vol.73, issue.9, p.94127, 2006.
DOI : 10.1103/PhysRevB.73.094127

Z. Zhuang, A. G. Casielles, and D. S. , Phase Diagram of Isobutyric Acid and Water in Dilute Silica Gel, Physical Review Letters, vol.77, issue.14, p.2969, 1996.
DOI : 10.1103/PhysRevLett.77.2969

Y. B. Melnichenko, G. D. Wignall, D. R. Cole, and H. Frielinghaus, Density fluctuations near the liquid-gas critical point of a confined fluid, Physical Review E, vol.69, issue.5, p.57102, 2004.
DOI : 10.1103/PhysRevE.69.057102

F. Bonnet, T. Lambert, B. Cross, L. Guyon, F. Despetis et al., He in aerogels, ?r????????????? ????????t?s??t?, p.56003, 2008.
DOI : 10.1209/0295-5075/82/56003
URL : https://hal.archives-ouvertes.fr/hal-00257998

P. C. Ball and R. Evans, Temperature dependence of gas adsorption on a mesoporous solid: capillary criticality and hysteresis, Langmuir, vol.5, issue.3, p.714, 1989.
DOI : 10.1021/la00087a026

F. Bonnet, M. Melich, L. Puech, and P. E. Wolf, Light scattering study of collective effects during evaporation and condensation in a disordered porous material, EPL (Europhysics Letters), vol.101, issue.1, p.16010, 2013.
DOI : 10.1209/0295-5075/101/16010

M. P. Lilly, A. H. Wootters, and R. B. Hallock, in Nuclepore, Physical Review Letters, vol.77, issue.20, p.4222, 1996.
DOI : 10.1103/PhysRevLett.77.4222

M. Cantin, M. Casse, L. Koch, R. Jouan, P. Mestreau et al., Silica aerogels used as Cherenkov radiators, Nuclear Instruments and Methods, vol.118, issue.1, p.177, 1974.
DOI : 10.1016/0029-554X(74)90700-9

A. Hasmy, E. Anglaret, M. Foret, J. Pelous, and R. Jullien, Small-angle neutron-scattering investigation of long-range correlations in silica aerogels: Simulations and experiments, Physical Review B, vol.50, issue.9, p.6006, 1994.
DOI : 10.1103/PhysRevB.50.6006

M. Melich, R. Boltnev, F. Bonnet, L. Guyon, and P. E. Wolf, On the Efficiency of Infrared Filters in Optical Cryostats, Journal of Low Temperature Physics, vol.60, issue.5-6, p.740, 2011.
DOI : 10.1007/s10909-010-0263-7
URL : https://hal.archives-ouvertes.fr/hal-00681674

H. Van-de-hulst, Light Scattering by Small Particles. Dover Books on Physics Series, 1957.

G. J. Aubry, F. Bonnet, M. Melich, L. Guyon, P. Spathis et al., Condensation of Helium in Aerogel and Athermal Dynamics of the Random-Field Ising Model, ?r????????????? ????????t???s????, p.85301, 2014.
DOI : 10.1103/PhysRevLett.113.085301

F. J. Pérez-reche, M. L. Rosinberg, and G. Tarjus, Numerical approach to metastable states in the zero-temperature random-field Ising model, Physical Review B, vol.77, issue.6, p.64422, 2008.
DOI : 10.1103/PhysRevB.77.064422

D. J. Tulimieri, J. Yoon, and M. H. Chan, Ordering of Helium Mixtures in Porous Gold, Physical Review Letters, vol.82, issue.1, p.121, 1999.
DOI : 10.1103/PhysRevLett.82.121

B. Berne and R. Pecora, Dynamic light scattering : with applications to chemistry , biology, and physics, 2000.

E. Kierlik, J. Puibasset, and G. Tarjus, Effect of the reservoir size on gas adsorption in inhomogeneous porous media, Journal of Physics: Condensed Matter, vol.21, issue.15, p.155102, 2009.
DOI : 10.1088/0953-8984/21/15/155102
URL : https://hal.archives-ouvertes.fr/hal-00321228

F. Preisach, Über die magnetische nachwirkung, 1935.

G. Bertotti, Hysteresis in Magnetism : For Physicists, Materials Scientists, and Engineers, 1998.

J. M. Deutsch and O. Narayan, Subharmonics and Aperiodicity in Hysteresis Loops, Physical Review Letters, vol.91, issue.20, 2003.
DOI : 10.1103/PhysRevLett.91.200601

J. M. Deutsch, A. Dhar, and O. Narayan, Return to Return Point Memory, Physical Review Letters, vol.92, issue.22, p.227203, 2004.
DOI : 10.1103/PhysRevLett.92.227203

J. A. Barker, D. E. Schreiber, B. G. Huth, and D. H. Everett, Magnetic Hysteresis and Minor Loops: Models and Experiments, Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, vol.386, issue.1791, p.251, 1983.
DOI : 10.1098/rspa.1983.0035

J. Ortín, Preisach modeling of hysteresis for a pseudoelastic Cu???Zn???Al single crystal, Journal of Applied Physics, vol.71, issue.3, p.1454, 1992.
DOI : 10.1063/1.351238

D. J. Holcomb, Memory, relaxation, and microfracturing in dilatant rock, Journal of Geophysical Research: Solid Earth, vol.80, issue.B7, p.6235, 1981.
DOI : 10.1029/JB086iB07p06235

P. E. Wolf, F. Bonnet, L. Guyon, T. Lambert, S. Perraud et al., Probing helium interfaces with light scattering: From fluid mechanics to statistical physics, ?r????????????? ????????t?s??t?, p.183, 2009.
DOI : 10.1140/epje/i2008-10417-1
URL : https://hal.archives-ouvertes.fr/hal-00294729

B. J. Frisken, F. Ferri, and D. S. , Critical behavior in the presence of a disordered environment, Physical Review E, vol.51, issue.6, p.5922, 1995.
DOI : 10.1103/PhysRevE.51.5922

K. Dahmen and J. P. Sethna, Hysteresis, avalanches, and disorder-induced critical scaling: A renormalization-group approach, ?r???????????t????????, p.14872, 1996.
DOI : 10.1103/PhysRevB.53.14872

T. Lambert, C. Gabay, L. Puech, and P. E. Wolf, He Condensation into a Silica Aerogel, Journal of Low Temperature Physics, vol.134, issue.1/2, p.293, 2004.
DOI : 10.1023/B:JOLT.0000012569.91725.5d

G. J. Aubry, F. Bonnet, M. Melich, L. Guyon, F. Despetis et al., Critical Behavior of the Liquid Gas Transition of 4He Confined in a Silica Aerogel, Journal of Low Temperature Physics, vol.11, issue.5-6, p.670, 2013.
DOI : 10.1007/s10909-012-0740-2
URL : https://hal.archives-ouvertes.fr/hal-00842669

R. R. Conte, Élements de cryogenie, 1970.

M. E. Fisher and P. G. De-gennes, Wall phenomena in a critical binary mixture, C. R. Acad. Sci. Paris Ser. B, vol.287, p.207, 1978.

W. F. Saam and M. W. Cole, Excitations and thermodynamics for liquid-helium films, Physical Review B, vol.11, issue.3, p.1086, 1975.
DOI : 10.1103/PhysRevB.11.1086

Y. B. Melnichenko, G. D. Wignall, D. R. Cole, and H. Frielinghaus, Adsorption of supercritical CO2 in aerogels as studied by small-angle neutron scattering and neutron transmission techniques, The Journal of Chemical Physics, vol.124, issue.20, p.204711, 2006.
DOI : 10.1063/1.2202324