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Title: Interfacial spin-filter assisted spin transfer torque effect in Co/BeO/Co magnetic tunnel junction

Abstract

The first-principles calculation is employed to demonstrate the spin-selective transport properties and the non-collinear spin-transfer torque (STT) effect in the newly proposed Co/BeO/Co magnetic tunnel junction. The subtle spin-polarized charge transfer solely at O/Co interface gives rise to the interfacial spin-filter (ISF) effect, which can be simulated within the tight binding model to verify the general expression of STT. This allows us to predict the asymmetric bias behavior of non-collinear STT directly via the interplay between the first-principles calculated spin current densities in collinear magnetic configurations. We believe that the ISF effect, introduced by the combination between wurtzite-BeO barrier and the fcc-Co electrode, may open a new and promising route in semiconductor-based spintronics applications.

Authors:
;  [1]
  1. Department of Physics, National Central University, Jung-Li 32001, Taiwan (China)
Publication Date:
OSTI Identifier:
22413200
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 9; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BERYLLIUM OXIDES; COBALT; COMPUTERIZED SIMULATION; CURRENT DENSITY; FCC LATTICES; HETEROJUNCTIONS; INTERFACES; MAGNETISM; SEMICONDUCTOR MATERIALS; SPIN; SPIN ORIENTATION; TUNNEL EFFECT

Citation Formats

Tang, Y.-H., E-mail: yhtang@cc.ncu.edu.tw, and Chu, F.-C. Interfacial spin-filter assisted spin transfer torque effect in Co/BeO/Co magnetic tunnel junction. United States: N. p., 2015. Web. doi:10.1063/1.4913780.
Tang, Y.-H., E-mail: yhtang@cc.ncu.edu.tw, & Chu, F.-C. Interfacial spin-filter assisted spin transfer torque effect in Co/BeO/Co magnetic tunnel junction. United States. doi:10.1063/1.4913780.
Tang, Y.-H., E-mail: yhtang@cc.ncu.edu.tw, and Chu, F.-C. Sat . "Interfacial spin-filter assisted spin transfer torque effect in Co/BeO/Co magnetic tunnel junction". United States. doi:10.1063/1.4913780.
@article{osti_22413200,
title = {Interfacial spin-filter assisted spin transfer torque effect in Co/BeO/Co magnetic tunnel junction},
author = {Tang, Y.-H., E-mail: yhtang@cc.ncu.edu.tw and Chu, F.-C.},
abstractNote = {The first-principles calculation is employed to demonstrate the spin-selective transport properties and the non-collinear spin-transfer torque (STT) effect in the newly proposed Co/BeO/Co magnetic tunnel junction. The subtle spin-polarized charge transfer solely at O/Co interface gives rise to the interfacial spin-filter (ISF) effect, which can be simulated within the tight binding model to verify the general expression of STT. This allows us to predict the asymmetric bias behavior of non-collinear STT directly via the interplay between the first-principles calculated spin current densities in collinear magnetic configurations. We believe that the ISF effect, introduced by the combination between wurtzite-BeO barrier and the fcc-Co electrode, may open a new and promising route in semiconductor-based spintronics applications.},
doi = {10.1063/1.4913780},
journal = {Journal of Applied Physics},
number = 9,
volume = 117,
place = {United States},
year = {Sat Mar 07 00:00:00 EST 2015},
month = {Sat Mar 07 00:00:00 EST 2015}
}