合金
材料科学
微晶
居里温度
凝聚态物理
磁矩
化学计量学
费米能级
基质(水族馆)
粒度
磁化
分析化学(期刊)
结晶学
电子
冶金
化学
磁场
物理化学
铁磁性
地质学
物理
海洋学
色谱法
量子力学
作者
Pushpesh Pathak,Gajendra Singh Bisht,A. Srinivasan
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2022-09-01
卷期号:169 (9): 092508-092508
被引量:2
标识
DOI:10.1149/1945-7111/ac8d76
摘要
Near stoichiometric Co 2 FeSn Heusler alloy films with a highly ordered L2 1 structure and mean grain size of 23 ± 1 nm have been prepared on a polycrystalline copper substrate for the first time by electrodeposition route. Deposition potential −4.0 V yielded the stoichiometric alloy composition in the potentiostatic mode. The highly disordered as-deposited alloy film crystallized into the ordered stable Heusler alloy structure upon heat treatment under vacuum. The heat-treated film exhibited the highest magnetic moment (5.18 ± 0.04 μ B /f.u. at 5 K) and Curie temperature (1123 K) ever achieved in this alloy in any form. The very high value of K eff (∼10 6 erg c.c. −1 ) obtained for this alloy makes this alloy promising for high-density magnetic recording application. Ab initio studies using GGA + U approach provide information on the minority gap near the Fermi level and its tunability as a function of the electron correlation factor represented by the Hubbard parameter U.
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