Optical control of the magnetic anisotropy of ferromagnetic bilayered manganites.
Optical control of the magnetic anisotropy of ferromagnetic bilayered manganites.
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DOI：
10.1103/physrevlett.98.017402
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发表时间：
2007-01
影响因子：
8.6
通讯作者：
S. Tomimoto;M. Matsubara;T. Ogasawara;H. Okamoto;T. Kimura;Y. Tokura
中科院分区：
文献类型：
--
作者：
S. Tomimoto;M. Matsubara;T. Ogasawara;H. Okamoto;T. Kimura;Y. Tokura
通过飞秒克尔旋转测量，证明了双层锰氧化物，La 2 - 2xSr 1 + 2xMn 2 O 7的磁各向异性的光学操纵。在x=0.32的晶体上的光激发，磁化表现出约1 ns的进动运动，揭示了从c轴到ab平面的磁晶各向异性的方向变化。各向异性的这种变化引起c轴磁化分量的非热减小约1 ns。
Optical manipulation of the magnetic anisotropy is demonstrated for bilayered manganites, La2-2xSr1+2xMn2O7, by means of femtosecond Kerr-rotation measurements. Upon the photoexcitation on the x=0.32 crystal, the magnetization exhibits the precessional motion for about 1 ns, revealing the directional change of the magnetocrystalline anisotropy from the c axis to the ab plane. This change of the anisotropy induces the nonthermal decrease of the c-axis magnetization component for about 1 ns.