Tuning of current-induced domain wall resonance frequency using Gd doping

被引：11
作者：
Lepadatu, S. [1 ]
Claydon, J. S. [1 ]
Ciudad, D. [1 ]
Kinane, C. J. [2 ]
Langridge, S. [2 ]
Dhesi, S. S. [3 ]
Marrows, C. H. [1 ]
机构：
[1] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England
[2] Rutherford Appleton Lab, ISIS, Didcot OX11 0QX, Oxon, England
[3] Diamond Light Source, Didcot OX11 0DE, Oxon, England
来源：
APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 07期
基金：
英国工程与自然科学研究理事会;
关键词：
current density; doping profiles; gadolinium; iron alloys; magnetic anisotropy; magnetic domain walls; nickel alloys; MOTION; FILMS;
D O I：
10.1063/1.3481074
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The current-induced resonance frequencies of domain walls in parabolic pinning potentials are measured in Gd doped NiFe as a function of doping level. The modification of magnetic properties due to Gd doping results in an order of magnitude increase in resonance frequencies for 10% Gd doping, due to the induced out-of-plane anisotropy, and the resonance frequencies are excited at lower current densities compared to undoped NiFe. These results are reproduced using a one-dimensional model of domain wall resonance, and found to be in good agreement in the small oscillation amplitude limit. (C) 2010 American Institute of Physics. [doi:10.1063/1.3481074]
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页数：3
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