Journal ArticleDOI
Large magnetoresistance in current-perpendicular-to-plane pseudospin valve using a Co2Fe(Ge0.5Ga0.5) Heusler alloy
Yukiko Takahashi,A. Srinivasan,B. Varaprasad,A. Rajanikanth,N. Hase,Tomoya Nakatani,Shinya Kasai,Takao Furubayashi,Kazuhiro Hono,Kazuhiro Hono +9 more
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TLDR
Using a newly developed highly spin-polarized Heusler alloy, Co2Fe(Ga05Ge05) (CFGG), as ferromagnetic layers, a current-perpendicular-to-plane pseudospin valve with large resistance change-area product (ΔRA) of 95mΩμm2 and magnetoresistance (MR) ratio (100×ΔR/R) of 417% at 300 K were fabricated in this paper.Abstract:
Using a newly developed highly spin-polarized Heusler alloy, Co2Fe(Ga05Ge05) (CFGG), as ferromagnetic layers, we have fabricated a current-perpendicular-to-plane pseudospin valve with large resistance change-area product (ΔRA) of 95 mΩ μm2 and magnetoresistance (MR) ratio (100×ΔR/R) of 417% at 300 K These values were further enhanced to ΔRA=264 mΩ μm2 and MR=1291% at 10 K The large MR values are attributed to the high spin polarization of the CFGG alloy confirmed by point contact Andreev reflection measurementsread more
Citations
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Oscillatory antiferromagnetic interlayer exchange coupling in Co2Fe(Al0.5Si0.5)/Ag/Co2Fe(Al0.5Si0.5) films and its application to trilayer magnetoresistive sensor
TL;DR: In this article, an oscillatory antiferromagnetic (AFM) interlayer exchange coupling (IEC) was observed in a trilayer film with Co2Fe(Al 0.5Si0.5) (CFAS) Heusler alloy ferromagnetic layers and a Ag spacer layer.
Journal ArticleDOI
Correlations Between Structural and Magnetic Properties of Co 2 FeSi Heusler-Alloy Thin Films
TL;DR: In this paper, the structural and magnetic properties of the full Heusler alloy Co2FeSi were investigated and experiments and simulations clarified the precise correlations between magnetic parameters and the degree of structural ordering.
Journal ArticleDOI
Large magnetoresistance in current-perpendicular-to-plane pseudo spin-valves using Co2Fe(Ga0.5Ge0.5) Heusler alloy and AgZn spacer
Ye Du,Ye Du,Takao Furubayashi,Taisuke Sasaki,Yuya Sakuraba,Yukiko Takahashi,Kazuhiro Hono,Kazuhiro Hono +7 more
TL;DR: In this article, a fully epitaxial pseudo spin-valve (PSV) using 10-nm-thick Co2Fe(Ga0.5Ge 0.5) (CFGG) layers and a 5-nmthick AgZn space layer annealed at 630 °C showed a large current-perpendicular-to-plane giant magnetoresistance (CPP-GMR) output with resistance-change area product, ΔRA, of 21.5 mΩ μm2 and MR ratio of 59.6
Journal ArticleDOI
Spin-polarized quantum transport in Fe4N based current-perpendicular-to-plane spin valve
TL;DR: In this paper, a spin valve employing Fe4N as electrode and Ag as spacer is simulated to study the spin polarized quantum transport by utilizing the first principles calculations combined with nonequilibrium Green's function.
References
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Journal ArticleDOI
Slater-Pauling behavior and origin of the half-metallicity of the full-Heusler alloys
TL;DR: In this article, the full-potential screened Korringa-Kohn-Rostoker method was used to study the half-metallic properties of Co, Fe, Rh, and Ru.
Journal ArticleDOI
Measuring the Spin Polarization of a Metal with a Superconducting Point Contact
R. J. Soulen,J. Byers,M. S. Osofsky,Boris Nadgorny,T. Ambrose,S. F. Cheng,P. R. Broussard,C. T. Tanaka,Janusz J. Nowak,Jagadeesh S. Moodera,A. Barry,J. M. D. Coey +11 more
TL;DR: A superconducting point contact is used to determine the spin polarization at the Fermi energy of several metals because the process of supercurrent conversion at a superconductor-metal interface (Andreev reflection) is limited by the minority spin population near the Fermani surface.
Journal ArticleDOI
Theory of the perpendicular magnetoresistance in magnetic multilayers.
Thierry Valet,Albert Fert +1 more
TL;DR: In this paper, the mechanisms of the giant magnetoresistance (MR) in magnetic multilayers were discussed very generally for both the CIP (current in plane) and CPP (current perpendicular to the planes) geometries.
Journal ArticleDOI
Precision Lattice Constants from X‐Ray Powder Photographs
TL;DR: In this article, a general method for the calculation of lattice constants from powder photographs is given, in which there is taken into account the various systematic errors inevitable in such photographs, including radius errors, film shrinkage, absorption, eccentricity and finite slit height.
Journal ArticleDOI
Andreev reflections at metal/superconductor point contacts: Measurement and analysis
TL;DR: In this paper, point-contact Andreev reflection measurements of point contact point contacts were analyzed with the Blonder-Tinkham-Klapwijk theory extended to include the polarization P of the metal and proximity effects.