Affiliation:
1. School of Physics and Electronic Engineering, Jiangsu Normal University 1 , Xuzhou 221116, China
2. School of Physics and Electronic Science, Zunyi Normal University 2 , Zunyi 563002, China
Abstract
High spin-injection-efficiency (SIE) and thermal spin-filter-effect (SFE) from a magnetic material to a barrier material are crucial to the high performance of a spintronic device and a spin caloritronic device, respectively. By performing a nonequilibrium Green’s function combined with first-principles calculations, we study the voltage-driven and temperature-driven spin transport properties of a half Heusler alloy RuCrAs based spin valve with different atom-terminated interfaces. The spin valve with a CrAs-top (or Ru-top) interface structure has an ultrahigh equilibrium magnetoresistance (MR) ratio of ∼1.56 × 109% (or ∼5.14 × 108%), ∼100% SIE, a large MR ratio, and high spin current intensity under bias voltage, suggesting that it has a great potential application in spintronic devices. The spin valve with the CrAs-top (or CrAs-bri) interface structure has a perfect SFE due to its very high spin polarization of temperature-driven currents, and it is useful in spin caloritronic devices.
Funder
Major Research Project of Innovation Group of Guizhou Education Department
Guizhou Science and Technology Project
Subject
Physical and Theoretical Chemistry,General Physics and Astronomy
Cited by
5 articles.
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