The study of the shape anisotropy in patterned permalloy films |
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Authors: | Zhang Dong Zhai Ya and Zhai Hong-Ru |
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Institution: | School of Physics Science and Information Engineering, Liaocheng University, Liaocheng 252059, China; Department of Physics, Southeast University, Nanjing 210096, China; National Laboratory of Solid Microstructure, Center for Materials Analysis, Nanjing University, Nanjing 210093, China |
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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. |
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Keywords: | patterned film shape anisotropy ferromagnetic resonance |
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