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是一种既具有铁磁性又具有绝缘体-金属跃迁的稀有物质。载流子诱导的磁极化子被认为在跃迁机理中起重要作用。当磁极化子和由此产生的跃迁可以通过引入载流子到体表面态的电场效应来控制时，即静电载流子掺杂（ESD），它将成为自旋电子学器件中新的工作原理的候选。在本研究中，我们进行了高质量的EuO单晶生长，并首次在获得的单晶的劈裂表面上制作场效应晶体管，成功地实现了ESD。