Control of in-plane uniaxial anisotropy of Fe 72Si 14B 14 magnetostrictive thin film using a thermal expansion coefficient

Jaewon Shin, Sung Hoon Kim, Yasuaki Suwa, Shuichiro Hashi, Kazushi Ishiyama

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5 Citations (Scopus)

Abstract

This paper introduces an in-plane uniaxial anisotropy control method of Fe 72Si 14B 14 magnetostrictive thin-film for high sensitivity of MI sensor. The anisotropy can be controlled by inverse-magnetostriction and inducing a bias stress using the difference of thermal expansion coefficient in bimetal structure. We can control the uniaxiality of anisotropy by the structure of the thin-film. Our proposed methods are useful in solving the problems and inconveniences of existing methods. To verify the proposed methods, we carried out experiments as well as FEM simulation. Looking at the FEM simulation and magnetic domain observation results, we confirmed that the in-plane uniaxial anisotropy could be controlled by a difference of a thermal expansion coefficient. Moreover, changes in the length of the conductive layer provides the local (edge section) control of the uniaxial anisotropy.

Original languageEnglish
Article number07E511
JournalJournal of Applied Physics
Volume111
Issue number7
DOIs
Publication statusPublished - 2012 Apr 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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