Temperature dependent coercivity and magnetization of light rare-earth Nd doped permalloy thin films

被引：17
作者：
Luo, Chen [1 ]
Fu, Yu [1 ,3 ]
Zhang, Dong [1 ,4 ]
Yuan, Shijun [1 ]
Zhai, Ya [1 ]
Dong, Shuai [1 ]
Zhai, Hongru [2 ]
机构：
[1] SE Univ, Dept Phys, Nanjing 211189, Jiangsu, Peoples R China
[2] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China
[3] CEA, Inst Nanosci & Cryogenie, F-38054 Grenoble, France
[4] Liaocheng Univ, Sch Phys Sci & Informat Engn, Liaocheng 252059, Peoples R China
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2015年 / 374卷
关键词：
Permalloy; Neodymium doping; Magnetization; Coercivity; FERROMAGNETIC-RESONANCE; ANGULAR-DEPENDENCE; FREQUENCY; REVERSAL; DOPANTS; ALLOYS;
D O I：
10.1016/j.jmmm.2014.09.014
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The temperature dependence of the magnetic properties of Ni80Fe20 thin films with dilute Nd dopants has been studied. The effect of Nd dopants on the hysteresis loops of Nd-doped Ni80Fe20 thin films is small at room temperature but large at low temperature. The measurements show an interesting temperature dependence of the coercivity with different concentrations of Nd impurities, which might be related to the film structure. The temperature dependence of the saturation magnetization for Nd-doped Ni80Fe20 thin films is fitted by a theoretical expression of spin-wave excitation plus Stoner-type-like contribution, in which the spin-wave excitation plays a main role at low temperature. The spin-wave stiffness constant D evaluated from the fitting shows a strong doping concentration dependence. (C) 2014 Elsevier By. All rights reserved.
引用
收藏
页码：711 / 715
页数：5
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