K. E. Sickafus, J. M. Wills, and N. W. Grimes, Structure of Spinel, Journal of the American Ceramic Society, vol.70, issue.4, p.82, 1999.
DOI : 10.1111/j.1151-2916.1999.tb02241.x

A. Navrotsky and O. J. Kleppa, The thermodynamics of cation distributions in simple spinels, Journal of Inorganic and Nuclear Chemistry, vol.29, issue.11, p.29, 1967.
DOI : 10.1016/0022-1902(67)80008-3

G. A. Sawatzky and F. , M??ssbauer Study of Several Ferrimagnetic Spinels, Physical Review, vol.187, issue.2, p.747, 1969.
DOI : 10.1103/PhysRev.187.747

E. J. Verwey and E. L. Heilmann, Physical Properties and Cation Arrangement of Oxides with Spinel Structures I. Cation Arrangement in Spinels, The Journal of Chemical Physics, vol.15, issue.4, p.15, 1947.
DOI : 10.1063/1.1746464

A. Miller, Distribution of Cations in Spinels, Journal of Applied Physics, vol.30, issue.4, 2009.
DOI : 10.1063/1.2185913

E. J. Verwey, P. W. Haayman, and F. C. Romeijn, Physical Properties and Cation Arrangement of Oxides with Spinel Structures II. Electronic Conductivity, The Journal of Chemical Physics, vol.15, issue.4, pp.15-181, 1947.
DOI : 10.1063/1.1746466

M. R. De-guire, R. C. Ohandley, and G. Kalonji, The cooling rate dependence of cation distributions in CoFe 2 O 4, J. Appl. Phys, pp.65-3167, 1989.

P. Umadevi and C. L. Nagendra, Preparation and characterisation of transition metal oxide micro-thermistors and their application to immersed thermistor bolometer infrared detectors, Sensors and Actuators A: Physical, vol.96, issue.2-3, p.96, 2002.
DOI : 10.1016/S0924-4247(01)00776-2

Y. Chen, J. E. Snyder, C. R. Schwichtenberg, K. W. Dennis, R. W. Mc-callum et al., Metal-bonded Co-ferrite composites for magnetostrictive torque sensor applications, IEEE Trans. Magn, vol.35, issue.3652, 1999.
DOI : 10.1109/intmag.1999.837580

B. Raveau, Strongly correlated electron systems: From chemistry to physics, Comptes Rendus Chimie, vol.14, issue.9, 2011.
DOI : 10.1016/j.crci.2011.06.006

S. Walia, S. Balendhran, H. Nili, S. Zhuiykov, G. Rosengarten et al., Transition metal oxides ??? Thermoelectric properties, Progress in Materials Science, vol.58, issue.8, p.1443, 2013.
DOI : 10.1016/j.pmatsci.2013.06.003

S. Roy and S. B. Majumder, Recent advances in multiferroic thin films and composites, Journal of Alloys and Compounds, vol.538, issue.153, 2012.
DOI : 10.1016/j.jallcom.2012.05.125

S. Basu, K. R. Babu, and R. N. Choudhary, Studies on the piezoelectric and magnetostrictive phase distribution in lead zirconate titanate???cobalt iron oxide composites, Materials Chemistry and Physics, vol.132, issue.2-3, p.132, 2012.
DOI : 10.1016/j.matchemphys.2011.11.071

H. F. Wang, R. Kavanagh, Y. L. Guo, Y. Guo, G. Lu et al., Origin of extraordinarily high catalytic activity of Co3O4 and its morphological chemistry for CO oxidation at low temperature, Journal of Catalysis, vol.296, p.296, 2012.
DOI : 10.1016/j.jcat.2012.09.005

Y. Tan, C. Wu, H. Lin, J. Li, B. Chi et al., Insight the effect of surface Co cations on the electrocatalytic oxygen evolution properties of cobaltite spinels, Electrochimica Acta, vol.121, issue.183, 2014.
DOI : 10.1016/j.electacta.2013.12.128

J. Robin, Recherches sur la consitution et la stabilité de quelques solutions solides à base d'oxyde de cobalt, Ann. Chim, vol.12, issue.389, 1955.

M. Takahashi and M. E. Fine, Coercive Force of Spinodally Decomposed Cobalt Ferrite with Excess Cobalt, Journal of the American Ceramic Society, vol.242, issue.2, p.53, 1970.
DOI : 10.1103/PhysRev.99.1788

M. Takahashi, J. R. Guimaraes, and M. E. Fine, Spinodal decomposition in the system CoFe 2 O 4 ?Co 3 O 4, J. Am. Ceram. Soc, pp.54-291, 1971.

J. W. Cahn and J. E. Hilliard, Free energy of a nonuniform system. I. Interfacial free energy, J. Chem. Phys, vol.258, p.28, 1958.

S. Hirano, T. Yogo, K. Kikuta, E. Asai, K. Sugiyama et al., Preparation and Phase Separation Behavior of (Co,Fe)3O4 Films, Journal of the American Ceramic Society, vol.233, issue.11, pp.76-1788, 1993.
DOI : 10.1111/j.1151-2916.1993.tb06648.x

K. J. Kim, J. H. Lee, and C. S. Kim, Phase decomposition and related structural and magnetic properties of iron-cobaltite thin films, Journal of the Korean Physical Society, vol.61, issue.8, pp.61-1274, 2012.
DOI : 10.3938/jkps.61.1274

H. , L. Trong, A. Barnabe, L. Presmanes, and P. Tailhades, Phase decomposition study in Co x Fe 3? x O 4 iron cobaltites: synthesis and structural characterization of the spinodal transformation, Solid State Sci, vol.10, issue.550, 2008.

M. G. Miranda, E. Estevez-rams, G. Martinez, and M. N. Baibich, Phase separation in Cu 90 Co 10 high-magnetoresistance materials, Phys. Rev. B, vol.68, 2003.

A. Hutten, D. Sudfeld, K. Wojcrykowski, P. Jutzi, and G. Reiss, Giant magnetoresistance and magnetic aspects in granular structures, Journal of Magnetism and Magnetic Materials, vol.262, issue.1, p.262, 2003.
DOI : 10.1016/S0304-8853(03)00013-1

S. A. Nikitov, P. Tailhades, and C. S. Tsai, Spin waves in periodic magnetic structuresmagnonic crystals, J. Magn. Magn. Mater, vol.320, p.236, 2001.

Y. V. Gulyaev, S. A. Nikitov, L. V. Zhivotovskii, A. A. Klimov, P. Tailhades et al., Ferromagnetic films with magnon bandgap periodic structures: Magnon crystals, Journal of Experimental and Theoretical Physics Letters, vol.77, issue.10, 2003.
DOI : 10.1134/1.1595698

B. Mauvernay, L. Presmanes, C. Bonningue, and P. Tailhades, Nanocomposite Fe 1 ? x O/ Fe 3 O 4 , Fe/Fe 1 ? x thin films prepared by RF sputtering and revealed by magnetic coupling effects, J. Magn. Magn. Mater, vol.320, issue.58, 2008.

M. Ohring, Materials Science of Thin Films, 2001.

A. Richardt and A. M. Durand, Les interactions ions énergétiques-solides, 1997.

G. Panzner, B. Egert, and H. P. Schmidt, The stability of CuO and Cu 2 O surfaces during argon sputtering studied by XPS and AES, Surf. Sci, pp.151-400, 1985.

T. M. Bui, H. Le-trong, L. Presmanes, A. Barnabé, and C. Bonningue, Thin films of Co 1.7 Fe 1.3 O 4 prepared by radio frequency sputtering ? the first step towards their spinodal decomposition, CrystEngComm, vol.16, issue.3359, 2014.
URL : https://hal.archives-ouvertes.fr/hal-01153084

W. B. White and B. A. , Interpretation of the vibrational spectra of spinels, Spectrochimica Acta Part A: Molecular Spectroscopy, vol.23, issue.4, p.985, 1967.
DOI : 10.1016/0584-8539(67)80023-0

H. Shirai, Y. Morioka, and I. Nakagawa, Infrared and Raman Spectra and Lattice Vibrations of Some Oxide Spinels, Journal of the Physical Society of Japan, vol.51, issue.2, p.51, 1982.
DOI : 10.1143/JPSJ.51.592

N. Bahlawane, P. H. Ngamou, V. Vannier, T. Kottke, J. Heberle et al., Kohse-Höinghaus, Tailoring the properties and the reactivity of the spinel cobalt oxide, Phys. Chem. Chem. Phys, pp.11-9224, 2009.

S. Ayyappan, J. Philip, and B. Raj, Nanoparticles, The Journal of Physical Chemistry C, vol.113, issue.2, p.590, 2009.
DOI : 10.1021/jp8083875

P. Chandramohan, M. P. Srinivasan, S. Velmurugan, and S. V. Narasimhan, Cation distribution and particle size effect on Raman spectrum of CoFe 2 O 4, J. Solid State Chem, vol.184, issue.89, 2011.

]. G. Shemer, E. Tirosh, T. Livneh, and G. Markovich, Doping in Ferrite Nanocrystals, The Journal of Physical Chemistry C, vol.111, issue.39, p.14334, 2007.
DOI : 10.1021/jp0736793

T. Yu, Z. X. Shen, Y. Shi, and J. Ding, powder: micro-Raman scattering study, Journal of Physics: Condensed Matter, vol.14, issue.37, p.613, 2002.
DOI : 10.1088/0953-8984/14/37/101

M. Hanesch, Raman spectroscopy of iron oxides and (oxy)hydroxides at low laser power and possible applications in environmental magnetic studies, Geophysical Journal International, vol.177, issue.3, p.941, 2009.
DOI : 10.1111/j.1365-246X.2009.04122.x

F. Oudrhiri-hassani, L. Presmanes, and A. Barnabé, Ph. Tailhades, Microstructure, porosity and roughness of RF sputtered oxide thin films: characterization and modelization, Appl. Surf. Sci, vol.254, issue.5796, 2008.

S. Capdeville, P. Alphonse, C. Bonningue, and L. , Presmanes, Ph. Tailhades, Microstructure and electrical properties of sputter-deposited Zn 0.87 Fe 2.13 O 4 thin layers, J. Appl. Phys, pp.96-6142, 2004.

A. Lisfi, C. M. Williams, L. T. Nguyen, J. C. Lodder, A. Coleman et al., Reorientation of magnetic anisotropy in epitaxial cobalt ferrite thin films, Physical Review B, vol.76, issue.5, p.54405, 2007.
DOI : 10.1103/PhysRevB.76.054405

Y. Suzuki, G. Hu, R. B. Van-dover, and R. J. Cava, Magnetic anisotropy of epitaxial cobalt ferrite thin films, Journal of Magnetism and Magnetic Materials, vol.191, issue.1-2, p.191, 1999.
DOI : 10.1016/S0304-8853(98)00364-3

W. H. Meiklejohn and C. P. Bean, New Magnetic Anisotropy, Physical Review, vol.102, issue.5, p.1413, 1956.
DOI : 10.1103/PhysRev.102.1413

W. H. Meiklejohn, Exchange Anisotropy in the Iron???Iron Oxide System, Journal of Applied Physics, vol.29, issue.3, 1858.
DOI : 10.1063/1.1723179

J. Nogués and I. K. Schuller, Exchange bias, Journal of Magnetism and Magnetic Materials, vol.192, issue.2, 1999.
DOI : 10.1016/S0304-8853(98)00266-2

G. H. Jonker, Analysis of the semiconducting properties of cobalt ferrite, Journal of Physics and Chemistry of Solids, vol.9, issue.2, 1959.
DOI : 10.1016/0022-3697(59)90206-9

G. H. Jonker and S. Van-houten, Semiconducting properties of transition metal oxides, 1959.
DOI : 10.1007/BFb0119537

P. A. Cox, Electronic Structure and Chemical of Solids, 1987.