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arXiv · 2509.03254

Effect of Magnetic Anisotropy on Magnetoelastic Waves in Ni/LiNbO3 Hybrid Device

Minwoo Yu·Moojune Song·Minseok Kang·Mujin You·Yunyoung Hwang·Albert Min Gyu Park·Byong-Guk Park·Kab-Jin Kim·Junho Suh
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Abstract

We study the effects of magnetic anisotropy and crystalline axes in surface acoustic waves (SAWs) driven magnetic resonances of Ni/LiNbO3 hybrid devices. SAW absorption from the interaction with magnons in Ni displays a strong anisotropic dependence on the direction of the applied in-plane magnetic field. Magnetic anisotropy is further investigated by magneto-optical Kerr effect measurements to show both uniaxial and biaxial anisotropy components in Ni films on LiNbO3. By introducing a dipolar interaction term in addition to the anisotropies, we successfully explain the anisotropic SAW absorption in our devices. These findings show the importance of substrate-induced anisotropy and long-range dipolar effects in SAW-magnons hybrid devices and indicate future directions for optimizing these spin-acoustic devices through comprehensive anisotropy engineering.

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Minwoo Yu, Moojune Song, Minseok Kang, Mujin You, Yunyoung Hwang, Albert Min Gyu Park, Byong-Guk Park, Kab-Jin Kim, Junho Suh. 2025-09-03. Effect of Magnetic Anisotropy on Magnetoelastic Waves in Ni/LiNbO3 Hybrid Device. https://arxiv.org/abs/2509.03254

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