Large enhancement of magnetic moment in L10 ordered FePt thin films by Nd substitutional doping

被引：9
|
作者：
Xu, D. B. [1 ,2 ]
Sun, C. J. [1 ]
Chen, J. S. [2 ]
Heald, S. M. [1 ]
Sanyal, B. [3 ]
Rosenberg, R. A. [1 ]
Zhou, T. J. [4 ]
Chow, G. M. [2 ]
机构：
[1] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA
[2] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117576, Singapore
[3] Uppsala Univ, Dept Phys & Astron, S-75120 Uppsala, Sweden
[4] ASTAR, Data Storage Inst, Singapore 117608, Singapore
来源：
JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2015年 / 48卷 / 25期
基金：
瑞典研究理事会;
关键词：
L1(0) FePt; substitutional doping; magnetic moment; RAY CIRCULAR-DICHROISM; ABSORPTION; ENERGY; RULES;
D O I：
10.1088/0022-3727/48/25/255001
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We studied L1(0) ordered Fe50Pt50-xNdx alloy films, which showed a large enhancement (similar to 18.4% at room temperature and similar to 11.7% at 10 K) of magnetic moment with 6 atomic % of Nd. Analysis of the x-ray magnetic circular dichroism spectra at the Fe L-3,L-2 edges and Nd M-5,M-4 edges in Fe50Pt44Nd6 films indicated a significant contribution of the Nd orbital moment. The origin of the large enhancement of magnetic moment was attributed to the effect of ferromagnetic coupling of the total magnetic moments between Fe and Nd. Density functional theory based first principles calculations supported the experimental observations of increasing moment due to Nd substitution of Pt.
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页数：8
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