Experimental evidence of the spin-dependence of electrons reflections in magnetic multilayers. Snoeck, E., Gatel, C., Serra, R., Ousset, J. C., Moussy, J. B., Bataille, A., Pannetier, M., & Gautier-Soyer, M. Materials Science and Engineering B-Solid State Materials for Advanced Technology, 126(2-3):120--125, January, 2006. WOS:000235115900003
doi  abstract   bibtex   
The giant magnetoresistance (GMR) of multilayers in the current in plane (CIP) geometry can be understood by considering the spin-dependent scattering effects within the magnetic layers and at the non-magnetic/magnetic interfaces. In this paper we experimentally put on view the magnetoresistance effect created only by the spin-dependent reflection of electrons at the interfaces. Two epitaxial systems were studied, consisting of two ferrimagnetic insulators layers at low temperature (CoFe2O4 and Fe3O4) separated by a non-magnetic metallic layer (M = Au or Pt). The transport properties indicate that conduction of the CoFe2O4/M/Fe3O4 trilayers take place within the thin metallic layer. An optimal magnetoresistance up to 5% at 10 K associated to the switching from parallel to anti-parallel configuration of the magnetization of the two ferrite layers has been obtained. It is associated to the spin-dependent interfacial scattering contribution of the CIP-GMR. The augmentation of the GMR when decreasing the metallic layer thickness or increasing the oxide layers width confirms this GMR is essentially an interfacial phenomenon. The Pt-based system shows an additional Anisotropic Magnetoresistance (AMR), which is not evidenced in the Au-based trilayer. We suggest that this AMR comes from the polarization of the Pt layer by the ferrimagnetic oxides. (c) 2005 Elsevier B.V. All rights reserved.
@article{snoeck_experimental_2006-1,
	title = {Experimental evidence of the spin-dependence of electrons reflections in magnetic multilayers},
	volume = {126},
	doi = {10.1016/j.mseb.2005.09.011},
	abstract = {The giant magnetoresistance (GMR) of multilayers in the current in plane (CIP) geometry can be understood by considering the spin-dependent scattering effects within the magnetic layers and at the non-magnetic/magnetic interfaces. In this paper we experimentally put on view the magnetoresistance effect created only by the spin-dependent reflection of electrons at the interfaces. Two epitaxial systems were studied, consisting of two ferrimagnetic insulators layers at low temperature (CoFe2O4 and Fe3O4) separated by a non-magnetic metallic layer (M = Au or Pt). The transport properties indicate that conduction of the CoFe2O4/M/Fe3O4 trilayers take place within the thin metallic layer. An optimal magnetoresistance up to 5\% at 10 K associated to the switching from parallel to anti-parallel configuration of the magnetization of the two ferrite layers has been obtained. It is associated to the spin-dependent interfacial scattering contribution of the CIP-GMR. The augmentation of the GMR when decreasing the metallic layer thickness or increasing the oxide layers width confirms this GMR is essentially an interfacial phenomenon. The Pt-based system shows an additional Anisotropic Magnetoresistance (AMR), which is not evidenced in the Au-based trilayer. We suggest that this AMR comes from the polarization of the Pt layer by the ferrimagnetic oxides. (c) 2005 Elsevier B.V. All rights reserved.},
	number = {2-3},
	journal = {Materials Science and Engineering B-Solid State Materials for Advanced Technology},
	author = {Snoeck, E. and Gatel, C. and Serra, R. and Ousset, J. C. and Moussy, J. B. and Bataille, A. and Pannetier, M. and Gautier-Soyer, M.},
	month = jan,
	year = {2006},
	note = {WOS:000235115900003},
	pages = {120--125}
}

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