Magnetoelectric coupling at metal surfaces
Magnetoelectric coupling at metal surfaces
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DOI：
10.1038/nnano.2010.214
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发表时间：
2010-11-01
影响因子：
38.3
通讯作者：
Wulfhekel, W.
中科院分区：
文献类型：
--
作者：
Gerhard, L.;Yamada, T. K.;Wulfhekel, W.
磁电耦合允许材料的磁性状态被施加的电场改变。迄今为止，这种现象主要在绝缘材料如复合多铁性氧化物中观察到。大块金属系统不表现出磁电耦合，因为所施加的电场被传导电子屏蔽。我们展示了强磁电耦合在铁薄膜的表面，使用从扫描隧道显微镜的电场，并能够写入，存储和读取信息的几个纳米的侧边的区域。我们的工作表明，高密度，非易失性的信息存储是可能的金属。
Magnetoelectric coupling allows the magnetic state of a material to be changed by an applied electric field. To date, this phenomenon has mainly been observed in insulating materials such as complex multiferroic oxides. Bulk metallic systems do not exhibit magnetoelectric coupling, because applied electric fields are screened by conduction electrons. We demonstrate strong magnetoelectric coupling at the surface of thin iron films using the electric field from a scanning tunnelling microscope, and are able to write, store and read information to areas with sides of a few nanometres. Our work demonstrates that high-density, non-volatile information storage is possible in metals.