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Title: Tunable magnetization relaxation of Fe2Cr1−xCoxSi half-metallic Heusler alloys by band structure engineering
Authors: He, Shikun
Liu, Yifan
Zheng, Yuhong
Qin, Qing
Wen, Zhenchao
Wu, Qingyun
Yang, Yi
Wang, Yupu
Feng, YuanPing
Teo, Kie Leong
Panagopoulos, Christos
Keywords: Spin Relaxation
Issue Date: 2017
Source: He, S., Liu, Y., Zheng, Y., Qin, Q., Wen, Z., Wu, Q., . . . Panagopoulos, C. (2017). Tunable magnetization relaxation of Fe2Cr1−xCoxSi half-metallic Heusler alloys by band structure engineering. Physical Review Materials, 1(6), 064401-. doi:10.1103/PhysRevMaterials.1.064401
Series/Report no.: Physical Review Materials
Abstract: We report a systematic investigation on the magnetization relaxation properties of iron-based half-metallic Heusler alloy Fe2Cr1−xCoxSi (FCCS) thin films using broadband angular-resolved ferromagnetic resonance. Band structure engineering through Co doping (x) demonstrated by first-principles calculations is shown to tune the intrinsic magnetic damping over an order of magnitude, namely 1×10−2-8×10−4. Notably, the intrinsic damping constants for samples with high Co concentration are among the lowest reported for Heusler alloys and even comparable to magnetic insulator yttrium iron garnet. Furthermore, a significant reduction of both isotropic and anisotropic contributions of extrinsic damping of the FCCS alloys was found in the FCCS films with x=0.5–0.75, which is of particular importance for applications. These results demonstrate a practical recipe to tailor functional magnetization for Heusler alloy-based spintronics at room temperature.
DOI: 10.1103/PhysRevMaterials.1.064401
Rights: © 2017 American Physical Society. All rights reserved. This paper was published in Physical Review Materials and is made available with permission of American Physical Society.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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