Ultralow effective Gilbert damping and induced orbital moment in strain-engineered FeGe films with Curie temperature exceeding room temperature
Ultralow effective Gilbert damping and induced orbital moment in strain-engineered FeGe films with Curie temperature exceeding room temperature
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居里温度超过室温的应变工程 FeGe 薄膜中的超低有效吉尔伯特阻尼和诱导轨道矩
DOI:
10.1016/j.jmmm.2022.170053
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发表时间:
2022
影响因子:
2.7
通讯作者:
Hauser, Adam J.
中科院分区:
文献类型:
--
作者:
Budhathoki, Sujan;Sapkota, Arjun;Law, Ka Ming;Ranjit, Smriti;Stephen, Gregory M.;Heiman, Don;Jamer, Michelle E.;Mewes, Tim;Hauser, Adam J.
We report the magnetic and magnetodynamic properties of strained epitaxial FeGe thin films on Ge (111) substrates, and confirm the generation of orbital moment in tensile-strained FeGe not seen in bulk or unstrained films. In-plane tensile strain resulted in an increase of the magnetic transition temperature to 350 K, likely the result of decreased Fe–Fe bond lengths that increase spin–orbit coupling strength. X-ray magnetic circular dichroism (XMCD) shows orbital-to-spin magnetic moment ratios of 0.18 and 0.14 for films of 18 nm and 72 nm thickness, respectively, indicative of partially quenched atomic orbitals. A very low effective Gilbert damping parameter, α e f f= 0.003±0.001 at room temperature was observed, suggesting that strained FeGe could be useful for spintronic applications.
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DOI:
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