Electric Field Induced Magnetic Anisotropy in a Ferromagnet
Electric Field Induced Magnetic Anisotropy in a Ferromagnet
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DOI：
10.1103/physrevlett.102.217201
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发表时间：
2009-05-29
影响因子：
8.6
通讯作者：
Stoehr, J.
中科院分区：
文献类型：
--
作者：
Gamble, S. J.;Burkhardt, Mark H.;Stoehr, J.
我们首次在薄膜金属铁磁体中观测到了瞬态全电场感生磁各向异性。我们用强（类似于10（9）V/m）和短（70 fs）的电场脉冲产生各向异性。这个场足够大，可以扭曲金属中的价电荷分布，但它的持续时间太短，无法改变原子的位置。这种纯电子结构的样品的改变产生了一种新型的瞬态各向异性轴，并强烈影响磁化动力学。这种各向异性的成功创建打开了所有的电场感应磁化反转在薄金属膜的可能性，一个非常希望尚未实现的过程。
We report the first observation of a transient all electric field induced magnetic anisotropy in a thin film metallic ferromagnet. We generate the anisotropy with a strong (similar to 10(9) V/m) and short (70 fs) E-field pulse. This field is large enough to distort the valence charge distribution in the metal, yet its duration is too brief to change the atomic positions. This pure electronic structure alteration of the sample generates a new type of transient anisotropy axis and strongly influences the magnetization dynamics. The successful creation of such an anisotropy opens the possibility for all E-field induced magnetization reversal in thin metallic films-a greatly desired yet unachieved process.