TY - JOUR
T1 - Spin-polarized transport through a magnetic heterostructure
T2 - Tunneling and spin filtering effect
AU - Lu, Jun Qiang
AU - Guo, Yong
AU - Zhai, Feng
AU - Gu, Bing Lin
AU - Yu, Jing Zhi
AU - Kawazoe, Yoshiyuki
N1 - Funding Information:
J.Q. Lu is grateful to AIEJ (the Association of International Education, Japan) for financial support. Y. Guo acknowledges support from the National Natural Science Foundation of China (Grant No. 10004006).
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2002
Y1 - 2002
N2 - We present tight-binding Green's function investigations on spin-polarized transport through a magnetic heterostructure system, which is made of two superlatticed magnetic layers separated by a nonmagnetic low-density-carrier spacer. The results confirm that in such a system, tunneling is one of the key mechanisms in electron transport. When tunneling effect is taken into account, the magnetoresistance ratios are reduced significantly. We also study the influence of the applied bias on the spin filtering effect. It is found that the current density is almost completely spin-polarized in a wide range of the applied bias, which indicates the heterostructure system can act as a good spin filter.
AB - We present tight-binding Green's function investigations on spin-polarized transport through a magnetic heterostructure system, which is made of two superlatticed magnetic layers separated by a nonmagnetic low-density-carrier spacer. The results confirm that in such a system, tunneling is one of the key mechanisms in electron transport. When tunneling effect is taken into account, the magnetoresistance ratios are reduced significantly. We also study the influence of the applied bias on the spin filtering effect. It is found that the current density is almost completely spin-polarized in a wide range of the applied bias, which indicates the heterostructure system can act as a good spin filter.
KW - Giant magnetoresistance
KW - Magnetic heterostructure
KW - Spin filter
KW - Spin-polarized transport
KW - Tunneling
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U2 - 10.1016/S0375-9601(02)00743-0
DO - 10.1016/S0375-9601(02)00743-0
M3 - Article
AN - SCOPUS:0037100575
VL - 299
SP - 616
EP - 621
JO - Physics Letters, Section A: General, Atomic and Solid State Physics
JF - Physics Letters, Section A: General, Atomic and Solid State Physics
SN - 0375-9601
IS - 5-6
M1 - 11651
ER -