Surface acoustic wave on a multiferroic material CuB2O4 and magnon-phonon coupling.
ORAL
Abstract
We successfully excited surface acoustic wave on a typical multiferroic material CuB2O4.
Surface acoustic wave (SAW) is phonon traveling along the surface of a material. SAW can be generated by applying ac electric field to piezoelectric substrate, such as quartz or LiNbO3.
In this research, we fabricated SAW device composed of noncentrosymmetric magnet CuB2O4 substrate. CuB2O4 has piezoelectricity at room temperature and shows canted antiferromagnetic order at low temperature. In this device, we could excite SAW and observe its intensity change in magnetic field, which is consistent with the magnetic field dependence of magnetic resonance of CuB2O4. This means SAW oscillation generates magnetic resonance in CuB2O4.
This research is expected be applied in spintronics devices and may propose a new method to study phonon propagation in multiferroic materials.
Surface acoustic wave (SAW) is phonon traveling along the surface of a material. SAW can be generated by applying ac electric field to piezoelectric substrate, such as quartz or LiNbO3.
In this research, we fabricated SAW device composed of noncentrosymmetric magnet CuB2O4 substrate. CuB2O4 has piezoelectricity at room temperature and shows canted antiferromagnetic order at low temperature. In this device, we could excite SAW and observe its intensity change in magnetic field, which is consistent with the magnetic field dependence of magnetic resonance of CuB2O4. This means SAW oscillation generates magnetic resonance in CuB2O4.
This research is expected be applied in spintronics devices and may propose a new method to study phonon propagation in multiferroic materials.
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Presenters
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Ryo Sasaki
Basic Science, Univ of Tokyo
Authors
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Ryo Sasaki
Basic Science, Univ of Tokyo
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Yoichi Nii
Basic Science, Univ of Tokyo, Department of Basic Science, University of Tokyo
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Yoshinori Onose
Basic Science, Univ of Tokyo, Department of Basic Science, University of Tokyo