Study on mangetic polaron induced by electric field effect in EuO

EuO中电场效应诱导磁极化子的研究

• 批准号: 23654125
• 负责人: SUZUKI Hiroyuki
• 金额: $ 2.33万
• 依托单位: National Institute for Materials Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23654125/
• 关键词: 電界効果; 磁気ポーラロン; 金属絶縁体転移; 強磁性転移; 希土類酸化物; 純良単結晶育成

Rare earth mono-oxide EuO is one of rare substances, which shows both ferromagnetic and insulator-metal transitions. Magnetic polaron induced by a carrier is considered to play an important role in the mechanism of the transitions. When the magnetic polaron and also the resulting transitions can be controlled by the electric field effect introducing the carrier into the bulk surface state, i.e. electrostatic carrier doping (ESD), it will be a candidate of new operation principal in the spintronics devices. In this research, we have performed high quality single crystal growth of EuO and have first succeeded in ESD by field effect transistor fabricated on the cleaved surface of the obtained single crystal.

稀土单氧化物EUO是稀有物质之一，它既显示铁磁和绝缘剂 - 金属跃迁。载体引起的磁极被认为在过渡机理中起重要作用。当磁极以及所得的过渡可以通过电场效应来控制，将载体引入大量的表面状态，即静电载体掺杂（ESD）时，它将是Spintronics设备中新操作原理的候选者。在这项研究中，我们进行了EUO的高质量单晶生长，并首先通过在获得的单晶的裂片表面上制造的现场效应晶体管在ESD中取得了成功。