Investigations of magnetic properties of Tb-doped Ni78Fe22 thin films

被引：3

作者：

Luo, C. ^{[1
]}

Sun, L. ^{[1
]}

Zhang, Y. ^{[1
]}

Huang, H. B.

Yang, M.

Zhai, Y. ^{[1
]}

Du, J.

Zhai, H. R.

机构：

[1] Southeast Univ, Dept Phys, Nanjing 210096, Jiangsu, Peoples R China

来源：

PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 9, NO 1 | 2012年 / 9卷 / 01期

关键词：

ferromagnetic resonance; NiFe films; terbium; COMPLEX PERMEABILITY; DEPENDENCE; FREQUENCY; EXCHANGE; REVERSAL; DOPANTS; ALLOYS;

D O I：

10.1002/pssc.201084182

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

(Ni78Fe22)(1-x)-Tb-x thin films (30 nm) were prepared by DC magnetron sputtering at room temperature. Their structures and magnetic properties were studied using X-ray diffraction (XRD), vibrating sample magnetometer (VSM), and ferromagnetic resonance (FMR). The film structure changes from polycrystalline to amorphous when Tb content is around 6.9%. The magnetization is reduced with the increasing Tb content due to Tb atomic moments align antiparallel with permalloy moments, while the low coercivity H-c less than 10 Oe, and the high hysteresis squareness along the in-plane easy-axis is remained. The measurements of angular dependences of ferromagnetic resonance field, as well as the theoretical fitting find the surface perpendicular anisotropy constants changes from "easy" film plane to "easy" film normal and g value shows increases with increasing Tb content, which implies the increase of orbital moment with Tb dopant. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：81 / 84

页数：4

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