论文标题
通过角动量从表面声波到铁磁旋转力矩的磁化控制
Magnetization control by angular momentum transfer from surface acoustic wave to ferromagnetic spin moments
论文作者
论文摘要
电子自旋与其他类型的角动量之间的角动量互连对于发展新的自旋功能很有用。已经很好地研究了从光子的角动量和机械旋转到铁磁自旋矩的转化。虽然最近的研究理论上表明原子的圆形振动是声子的角动量，但直接进行转化为旋转力矩的实验证明仍有待执行。在这里，我们证明了表面声波的声子角动量可以通过语音转换到Ni/linbo $ _3 $混合设备中角动量的语音转换来控制铁磁Ni膜的磁化。该结果清楚地表明，声子角动量可用于进一步化旋转器设备。
The angular momentum interconversion between electron spin and other type of angular momenta is useful to develop new spintronic functionalities. The conversions from the angular momentum of photon and mechanical rotation to ferromagnetic spin moment have been well studied. While the recent studies theoretically suggested circular vibration of atoms works as angular momentum of phonon, the direct experimental demonstration of conversion to spin moments remains to be performed. Here we demonstrate that the phonon angular momentum of surface acoustic wave can control the magnetization of a ferromagnetic Ni film by means of the phononic-to-electronic conversion of angular momentum in Ni/LiNbO$_3$ hybrid device. This result clearly shows the phonon angular momentum is useful to further fictionalize spintronic devices.
