Role of magnetostriction on power losses in nanocrystalline soft magnets

Hiroshi Tsukahara; Hiroshi Imamura; Chiharu Mitsumata; Kiyonori Suzuki; Kanta Ono

doi:10.1038/s41427-022-00388-2

Role of magnetostriction on power losses in nanocrystalline soft magnets

Hiroshi Tsukahara, Hiroshi Imamura, Chiharu Mitsumata, Kiyonori Suzuki, Kanta Ono

Materials Science & Engineering

Research output: Contribution to journal › Article › Research › peer-review

10 Citations (Scopus)

Abstract

Soft magnetic materials are key materials for the magnetic cores used in motors and generators. To improve the energy efficiency of magnetic cores, it is important to understand the mechanism of energy loss under oscillating magnetic fields. Here, we clarify the mechanism of energy loss in nanocrystalline soft magnetic materials (NSMMs), which are candidates for energy-efficient magnetic cores. To investigate the energy loss of an NSMM, it is necessary to consider the interaction between the magnetization and the crystal lattice, i.e., magnetostriction. However, the random distributions of crystalline axes in nanocrystals hinder magnetostriction calculation. We developed a micromagnetic simulation program by formulating the effective fields due to magnetostriction in randomly oriented nanocrystallites. We performed micromagnetic simulations of NSMMs under an oscillating magnetic field and found that the magnetic energy of the moving domain wall dissipates into the elastic energy of the crystal lattice through magnetostriction. These results can enable the design of highly energy-efficient NSMMs.

Original language	English
Article number	44
Number of pages	12
Journal	NPG Asia Materials
Volume	14
Issue number	1
DOIs	https://doi.org/10.1038/s41427-022-00388-2
Publication status	Published - 20 May 2022

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title = "Role of magnetostriction on power losses in nanocrystalline soft magnets",

abstract = "Soft magnetic materials are key materials for the magnetic cores used in motors and generators. To improve the energy efficiency of magnetic cores, it is important to understand the mechanism of energy loss under oscillating magnetic fields. Here, we clarify the mechanism of energy loss in nanocrystalline soft magnetic materials (NSMMs), which are candidates for energy-efficient magnetic cores. To investigate the energy loss of an NSMM, it is necessary to consider the interaction between the magnetization and the crystal lattice, i.e., magnetostriction. However, the random distributions of crystalline axes in nanocrystals hinder magnetostriction calculation. We developed a micromagnetic simulation program by formulating the effective fields due to magnetostriction in randomly oriented nanocrystallites. We performed micromagnetic simulations of NSMMs under an oscillating magnetic field and found that the magnetic energy of the moving domain wall dissipates into the elastic energy of the crystal lattice through magnetostriction. These results can enable the design of highly energy-efficient NSMMs.",

author = "Hiroshi Tsukahara and Hiroshi Imamura and Chiharu Mitsumata and Kiyonori Suzuki and Kanta Ono",

note = "Funding Information: This work was partly supported by JST-Mirai Program Grant Numbers JPMJMI19G1 and JPMJMI21G2. T.H., K.S., and K.O. acknowledge the support from Toyota Motor Corporation. The authors would like to express their sincere thanks to the crew of the Center for Computational Materials Science of the Institute for Materials Research, Tohoku University, for their continuous support of the supercomputing facilities. Publisher Copyright: {\textcopyright} 2022, The Author(s).",

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AU - Tsukahara, Hiroshi

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AU - Ono, Kanta

N1 - Funding Information: This work was partly supported by JST-Mirai Program Grant Numbers JPMJMI19G1 and JPMJMI21G2. T.H., K.S., and K.O. acknowledge the support from Toyota Motor Corporation. The authors would like to express their sincere thanks to the crew of the Center for Computational Materials Science of the Institute for Materials Research, Tohoku University, for their continuous support of the supercomputing facilities. Publisher Copyright: © 2022, The Author(s).

PY - 2022/5/20

Y1 - 2022/5/20

N2 - Soft magnetic materials are key materials for the magnetic cores used in motors and generators. To improve the energy efficiency of magnetic cores, it is important to understand the mechanism of energy loss under oscillating magnetic fields. Here, we clarify the mechanism of energy loss in nanocrystalline soft magnetic materials (NSMMs), which are candidates for energy-efficient magnetic cores. To investigate the energy loss of an NSMM, it is necessary to consider the interaction between the magnetization and the crystal lattice, i.e., magnetostriction. However, the random distributions of crystalline axes in nanocrystals hinder magnetostriction calculation. We developed a micromagnetic simulation program by formulating the effective fields due to magnetostriction in randomly oriented nanocrystallites. We performed micromagnetic simulations of NSMMs under an oscillating magnetic field and found that the magnetic energy of the moving domain wall dissipates into the elastic energy of the crystal lattice through magnetostriction. These results can enable the design of highly energy-efficient NSMMs.

AB - Soft magnetic materials are key materials for the magnetic cores used in motors and generators. To improve the energy efficiency of magnetic cores, it is important to understand the mechanism of energy loss under oscillating magnetic fields. Here, we clarify the mechanism of energy loss in nanocrystalline soft magnetic materials (NSMMs), which are candidates for energy-efficient magnetic cores. To investigate the energy loss of an NSMM, it is necessary to consider the interaction between the magnetization and the crystal lattice, i.e., magnetostriction. However, the random distributions of crystalline axes in nanocrystals hinder magnetostriction calculation. We developed a micromagnetic simulation program by formulating the effective fields due to magnetostriction in randomly oriented nanocrystallites. We performed micromagnetic simulations of NSMMs under an oscillating magnetic field and found that the magnetic energy of the moving domain wall dissipates into the elastic energy of the crystal lattice through magnetostriction. These results can enable the design of highly energy-efficient NSMMs.

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Role of magnetostriction on power losses in nanocrystalline soft magnets

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