The study of the shape anisotropy in patterned permalloy films
Zhang Dong(张栋)a) b)† , Zhai Ya(翟亚)b), and Zhai Hong-Ru(翟宏如)c)
a School of Physics Science and Information Engineering, Liaocheng University, Liaocheng 252059, China; b Department of Physics, Southeast University, Nanjing 210096, China; c National Laboratory of Solid Microstructure, Center for Materials Analysis, Nanjing University, Nanjing 210093, China
Abstract In this paper a systematic ferromagnetic resonance study shows that an in-plane magnetic anisotropy in the patterned micron octagon permalloy (Ni$_{80}$Fe$_{20})$ elements is mainly determined by the element geometry. The easy-axis is along the edge of the elements, and the hard-axis is along the diagonal. The shape anisotropy of the octagon elements is determined by square and equilateral octagon, and the theoretical calculation was studied on the shape anisotropy. The shape anisotropy of rectangular was calculated by using the same theory.
Received: 17 September 2006
Revised: 05 January 2007
Accepted manuscript online:
(Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance)
Fund: Project supported by the National Natural Science Foundation of
China (Grant No~50171020) and the Foundation for youth
of Liaocheng University (Grant No~X051050).
Cite this article:
Zhang Dong(张栋), Zhai Ya(翟亚), and Zhai Hong-Ru(翟宏如) The study of the shape anisotropy in patterned permalloy films 2007 Chinese Physics 16 1725
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