利用剩余光致伸缩实现磁特性的光写入
Optical Writing of Magnetic Properties by Remanent Photostriction
摘要：
我们提出了一种光致折射光致伸缩在BiFeO 3，产生的光伏效应，这是用来修改的铁磁性的Ni膜的BiFeO 3/Ni混合结构。通过光学和非易失性控制，实现了Ni膜中75%的结晶度变化。这种光铁磁效应可以通过BiFeO 3的静电或交流电去极化来逆转。因此，磁特性中的应变相关变化被光学地写入，并且被电擦除。因此，光介导的应变电子学是一种可能的方法，用于低功率多态控制的磁性元件相关的存储器和自旋电子应用。
英文摘要：
We present an optically induced remanent photostriction in BiFeO3, resulting from the photovoltaic effect, which is used to modify the ferromagnetism of Ni film in a hybrid BiFeO3/Ni structure. The 75% change in coercivity in the Ni film is achieved via optical and nonvolatile control. This photoferromagnetic effect can be reversed by static or ac electric depolarization of BiFeO3. Hence, the strain dependent changes in magnetic properties are written optically, and erased electrically. Light-mediated straintronics is therefore a possible approach for low-power multistate control of magnetic elements relevant for memory and spintronic applications.
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