Magnetoelectric Control of Superparamagnetism
Magnetoelectric Control of Superparamagnetism
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DOI：
10.1021/nl3034637
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发表时间：
2013-03-01
期刊：
影响因子：
10.8
通讯作者：
Carman, Gregory P.
中科院分区：
文献类型：
--
作者：
Kim, Hyungsuk K. D.;Schelhas, Laura T.;Carman, Gregory P.
在这里，我们证明了电场诱导的磁各向异性的多铁性复合材料含有镍纳米晶体应变耦合到压电基板。该系统可以在室温下在超顺磁态和单畴铁磁态之间切换。的纳米晶体显示在40 K的阻断温度的移动后，电极化。我们相信这是第一个可以用电场来打开和关闭永久磁矩的系统的例子。
Here we demonstrate electric-field induced magnetic anisotropy in a multiferroic composite containing nickel nanocrystals strain coupled to a piezoelectric substrate. This system can be switched between a superparamagnetic state and a single-domain ferromagnetic state at room temperature. The nanocrystals show a shift in the blocking temperature of 40 K upon electric poling. We believe this is the first example of a system where an electric field can be used to switch on and off a permanent magnetic moment.