[11a-E214-1~11] 10.1 Emerging materials in spintronics and magnetics (including fabrication and characterization methodologies)

11:30 AM - 11:45 AM JST(2:30 AM - 2:45 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation AwardEnglish Presentation

[11a-E214-10] Tuning magnetostriction via crystallization in nanogranular Fe-B-N alloy films

〇Naoki Isogai¹, Kosuke Imamura¹, Yuta Nakamura^1,2, Masato Kotsugi², Mitsuru Ohtake¹ (1.Yokohama Nat. Univ., 2.Tokyo Univ. of Sci.)

Keywords:

Fe-B-N alloy,nanogranular structure,magnetostriction

Crystallization behavior is investigated as a key factor controlling the magnetostrictive properties of nanogranular Fe-B-N thin films. The microstructure varies depending on the annealing temperature. With increasing the annealing temperature, crystallization initially occures within the grains and parts of the grain boundaries, followed by grain growth and coalescence at higher temperatures. Consequently, the magnetostriction varies significantly from positive to negative values.