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Title: Investigations of interface spin asymmetry and interfacial resistance in Fe{sub x}Co{sub 100−x}/Ag interface

Abstract

We investigated current-perpendicular-to-plane (CPP) magnetotransport parameters of Fe{sub x}Co{sub 100−x}/Ag interfaces: interface specific resistance (AR{sub F/N}), extended interface resistance (AR{sup *}{sub F/N}), and spin scattering asymmetry (γ). We also investigated the dependence of interfacial parameters on the giant magnetoresistance effect with CPP geometry. For measuring these parameters, we prepared magnetic multilayers and pseudo spin valves (PSVs), combining the ferromagnetic (F) alloys Fe, Co, Fe{sub 50}Co{sub 50}, and Fe{sub 30}Co{sub 70} with the nonmagnetic (N) metal Ag. In all cases, the largest AR{sub F/N} value was found to be ∼0.68 mΩ μm{sup 2} with an enhanced AR{sup *}{sub F/N} value of ∼1.9 mΩ μm{sup 2} for a (001)-oriented Fe/Ag interface, which suggests that spin-up and spin-down electrons on the Fermi surface have very different transmission probabilities. Such an interface can act as a spin filter through which only one type of electrons can pass.

Authors:
; ; ;  [1]
  1. Electronic Engineering, Tohoku University, Sendai 980-8579 (Japan)
Publication Date:
OSTI Identifier:
22403024
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ASYMMETRY; COBALT; ELECTRIC CURRENTS; ELECTRONS; FERMI LEVEL; INTERFACES; IRON; LAYERS; MAGNETORESISTANCE; SCATTERING; SILVER; SPIN

Citation Formats

Jung, J. W., E-mail: jungjw@ecei.tohoku.ac.jp, Jin, Z., Shiokawa, Y., and Sahashi, M. Investigations of interface spin asymmetry and interfacial resistance in Fe{sub x}Co{sub 100−x}/Ag interface. United States: N. p., 2015. Web. doi:10.1063/1.4916500.
Jung, J. W., E-mail: jungjw@ecei.tohoku.ac.jp, Jin, Z., Shiokawa, Y., & Sahashi, M. Investigations of interface spin asymmetry and interfacial resistance in Fe{sub x}Co{sub 100−x}/Ag interface. United States. doi:10.1063/1.4916500.
Jung, J. W., E-mail: jungjw@ecei.tohoku.ac.jp, Jin, Z., Shiokawa, Y., and Sahashi, M. Thu . "Investigations of interface spin asymmetry and interfacial resistance in Fe{sub x}Co{sub 100−x}/Ag interface". United States. doi:10.1063/1.4916500.
@article{osti_22403024,
title = {Investigations of interface spin asymmetry and interfacial resistance in Fe{sub x}Co{sub 100−x}/Ag interface},
author = {Jung, J. W., E-mail: jungjw@ecei.tohoku.ac.jp and Jin, Z. and Shiokawa, Y. and Sahashi, M.},
abstractNote = {We investigated current-perpendicular-to-plane (CPP) magnetotransport parameters of Fe{sub x}Co{sub 100−x}/Ag interfaces: interface specific resistance (AR{sub F/N}), extended interface resistance (AR{sup *}{sub F/N}), and spin scattering asymmetry (γ). We also investigated the dependence of interfacial parameters on the giant magnetoresistance effect with CPP geometry. For measuring these parameters, we prepared magnetic multilayers and pseudo spin valves (PSVs), combining the ferromagnetic (F) alloys Fe, Co, Fe{sub 50}Co{sub 50}, and Fe{sub 30}Co{sub 70} with the nonmagnetic (N) metal Ag. In all cases, the largest AR{sub F/N} value was found to be ∼0.68 mΩ μm{sup 2} with an enhanced AR{sup *}{sub F/N} value of ∼1.9 mΩ μm{sup 2} for a (001)-oriented Fe/Ag interface, which suggests that spin-up and spin-down electrons on the Fermi surface have very different transmission probabilities. Such an interface can act as a spin filter through which only one type of electrons can pass.},
doi = {10.1063/1.4916500},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 17,
volume = 117,
place = {United States},
year = {2015},
month = {5}
}