Effect of seed layers on the static and dynamic magnetic properties of CoIr films with negative effective magnetocrystalline anisotropy

doi:10.1088/1674-1056/acd523

Abstract The c-axis oriented hcp-Co₈₁Ir₁₉ magnetic films were prepared on different seed layers (Ni, Cu, Ir, Pt, Au, and No seed). We systematically investigated the impact that surface-free energy and strain energy have on the orientation and defects and/or internal stress of the grains by increasing the lattice mismatch ratio. Moreover, the initial permeability and the natural resonance frequency were discussed in great detail using a comparison between calculated values and experimental values. We found that the almost unchanged 4πM_s and μ_i are not affected, while the changed H_c, intrinsic Kgrain, and f_r are strongly dependent on the seed layer and seed layer material. Moreover, the extracted damping constant is sensitive to the defects and/or internal stress and orientation of the grains. Therefore, the soft magnetic properties and microwave properties are adjusted and optimized by seed layers with different materials.

Keywords: seed layers magnetic anisotropy surface free energy soft magnetic thin films

Received: 05 December 2022
Revised: 28 April 2023
Accepted manuscript online: 12 May 2023

PACS:	77.55.Px	(Epitaxial and superlattice films)
	75.30.Gw	(Magnetic anisotropy)
	34.20.-b	(Interatomic and intermolecular potentials and forces, potential energy surfaces for collisions)
	75.70.-i	(Magnetic properties of thin films, surfaces, and interfaces)

Fund: Project supported by the Natural Science Foundation of Ningxia in China (Grant No.2022AAC03288) and the Ningxia New Solid Electronic Materials and Devices Research and Development Innovation Team (Grant No.2020CXTDLX12).

Corresponding Authors: Tao Wang
E-mail: wtao@lzu.edu.cn

Cite this article:

Tianyong Ma(马天勇), Sha Zhang(张莎), Chenhu Zhang(张晨虎), Zhiwei Li(李志伟), Tao Wang(王涛), and Fashen Li(李发伸) Effect of seed layers on the static and dynamic magnetic properties of CoIr films with negative effective magnetocrystalline anisotropy 2023 Chin. Phys. B 32 127503

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Effect of seed layers on the static and dynamic magnetic properties of CoIr films with negative effective magnetocrystalline anisotropy

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