phase transitions induced by pressure and transport properties in ferromagnetic metal with non-collinear spins

具有非共线自旋的铁磁金属中由压力和输运特性引起的相变

• 批准号: 20740186
• 负责人: IGUCHI Satoshi
• 金额: $ 2.75万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20740186/
• 关键词: 磁気輸送特性; フラストレーション系; モット転移; 圧力誘起相転移; 強相関系; 物性実験; 磁性; 圧力効果; 磁気輸送現象; 相転移; 輸送特性

We have investigated the high pressure effect for the pyrochlore-type molybdates, which is the Mott transition system, to search for new spin-charge coupled phenomena in the geometrically frustrated lattices. It was found that a strongly correlated paramagnetic metal phase emerges under high pressures regardless of the ground state at ambient pressure. This anomalous metallic phase is considered as a result of the spin frustration due to the antiferromagnetic superexchange interaction enhanced by the external pressure.

为了在几何阻挫晶格中寻找新的自旋-电荷耦合现象，我们研究了高温超导型超导体的高压效应，即Mott跃迁系统。结果发现，一个强相关的顺磁性金属相出现在高压下，无论在环境压力下的基态。这种反常的金属相被认为是由于反铁磁超交换相互作用被外部压力增强而引起的自旋阻挫的结果。

项目成果

Optical Probe for Anomalous Hall Resonance in Ferromagnets with Spin Chirality

• DOI: 10.1103/physrevlett.103.267206
• 发表时间: 2009-12-31
• 期刊: PHYSICAL REVIEW LETTERS
• 影响因子: 8.6
• 作者: Iguchi, S.;Kumakura, S.;Tokura, Y.
• 通讯作者: Tokura, Y.

Magnetic-field-induced ferroelectric state in DyFeO3

• DOI: 10.1103/physrevlett.101.097205
• 发表时间: 2008-08-29
• 期刊: PHYSICAL REVIEW LETTERS
• 影响因子: 8.6
• 作者: Tokunaga, Y.;Iguchi, S.;Tokura, Y.
• 通讯作者: Tokura, Y.

Emergence of a Diffusive Metal State with No Magnetic Order near the Mott Transition in Frustrated Pyrochlore-Type Molybdates

• DOI: 10.1103/physrevlett.102.136407
• 发表时间: 2009-04-03
• 期刊: PHYSICAL REVIEW LETTERS
• 影响因子: 8.6
• 作者: Iguchi, S.;Hanasaki, N.;Tokura, Y.
• 通讯作者: Tokura, Y.