Manipulating magnetic anisotropy and ultrafast spin dynamics of magnetic nanostructures<xref ref-type="fn" rid="cpb150907fn1">*</xref>

Manipulating magnetic anisotropy and ultrafast spin dynamics of magnetic nanostructures*

Cheng Zhao-Hua†, He Wei, Zhang Xiang-Qun, Sun Da-Li, Du Hai-Feng, Wu Qiong, Ye Jun, Fang Ya-Peng, Liu Hao-Liang

(a) The longitudinal Kerr loop of Fe/MgO(001) film with a magnetic field along the Fe[100] direction. (b) The normalized remanence of Fe/MgO(001) film as a function of the orientation of an in-plane magnetic field. (c) The TR-MOKE data of 10 nm Fe/MgO(001) film under the pump fluence of 16.5 mJ/cm². Inset is a sketch of the coordinate system. The external magnetic field H with the components H _x (20 mT) along the X axis and H _z (369 mT) along the Z axis is applied in the XZ plane during the TR-MOKE measurement. The magnetization M takes an angle of θ ₀ with respect to the Z axis.^{[ 91 ]}