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Although the relationship between magnetostriction and magnetic damping is often described phenomenologically, their intrinsic connection remains unclear. In this Letter, we demonstrate that the magnitude of magnetic damping depends on the sign of magnetostriction in (Fe_{1−x}Co_{x})_{4}N and Ni _{1−y}Co_{y} alloys across various compositions, consistent with experimental observations. This behavior is attributed to strain-induced changes in exchange splitting, which shift the minority-spin density of states near the Fermi level, thereby affecting both magnetostriction and damping through spin-conserving transitions. Additionally, the presence of locally degenerate orbitals plays a crucial role in determining magnetostriction. These findings suggest that magnetization dynamics and magnetostriction can be intrinsically controlled, facilitating the design of magnetic materials for applications such as flexible spintronics.

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• In Copyright
  

  ©2025 American Physical Society

Keyword: magnetostriction, magnetic damping, density of states, magnetoelasticity, magnetization dynamics

Date published: 2025-09-17

Publisher: American Physical Society (APS)

Journal:

• Physical Review B (ISSN: 24699950) vol. 112 issue. 10 L100407

Funding:

• Japan Society for the Promotion of Science JP22H04966
• Core Research for Evolutional Science and Technology JPMJCR21O1

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5928

First published URL: https://doi.org/10.1103/g47q-qyxj

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Updated at: 2025-11-27 08:30:31 +0900

Published on MDR: 2025-11-27 08:24:04 +0900