"Anomarous" extraordinary Hall effect in ruthenium oxides

氧化钌中“异常”的非凡霍尔效应

• 批准号: 19740203
• 负责人: KOBAYASHI Yoshihiko
• 金额: $ 2.4万
• 依托单位: Tokyo Medical University (2008-2009)The University of Electro-Communications (2007)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2007
• 资助国家: 日本
• 起止时间: 2007 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19740203/
• 关键词: 強相関電子系; ペロブスカイト型ルセニウム酸化物; 磁性・電子輸送現象; 異常ホール効果; 結晶構造変化; ペロブスカイト型Ru酸化物; 磁気測定; 電子輸送測定; 結晶構造解析; 構造相転移; 電気・磁気特性; 格子変調; Fermi面の再構築; 放射光X線回折実験

We have investigated the extraordinary Hall effect of Ba_<1-x>Sr_xRuO_3 with x = 1 and 0.8. For x = 1, extraordinary Hall coefficient Rs can be interpreted by the skew scattering mechanism in the paramagnetic region above about 160 K and by the combination of the skew and the side-jump scattering mechanisms in the ferromagnetic region above about 60 K, which means that the mechanism of the extraordinary Hall effect in the system is basically the same as that of the ordinary ferromagnetic metals. Below 60 K, the extraordinary Hall resistivity ρH shows an anomalous field dependence at intermediate field region. The deviation from the linear relation in Rs/ρ versus ρ was also observed below 60 K, which suggests that the coefficients a and b of the skew and the side-jump scattering depends on both temperature and field below 60 K. No anomalies both in the temperature and the field dependence below 60 K were observed in the sample with x = 0.8. According to the structural analysis of the samples, we infer that the modulation of the Fermi surface due to the structural change plays an important roll on the anomaly of the extraordinary Hall effect for x = 1.

我们已经研究了x = 1和0.8的ba_ <1-x> sr_xruo_3的非凡霍尔效应。对于X = 1，可以通过高于160 K的顺磁区域中的偏斜散射机制来解释非凡的大厅系数RS，并且通过偏斜和高于60 K的铁磁区域的偏斜散射机制的组合，这意味着基本上与系统相同的机制是相同的。低于60 K，抗异常大厅的ρH显示了中间场区域的异常场依赖性。在60 K以下还观察到了与Rs/ρ对ρ的线性关系的偏离，这表明偏斜的系数A和B的系数A和B侧跳散射取决于温度和低于60 K的温度。在温度下，在温度下都没有异常，并且在x = 0.8的样品中均观察到60 K以下60 k。根据样品的结构分析，我们推断出，由于结构变化引起的Fermi表面的调节在X = 1的非凡霍尔效应的异常上起着重要的作用。

项目成果

Structral analysis of iron mixed-valence complex (n-C3H7)4N[FeIIFeIII(dto)3] (dto=C2O2S2) under high pressure

铁混价络合物(n-C3H7)4N[FeIIFeIII(dto)3](dto=C2O2S2)的高压结构分析

• 发表时间: 2007
• 期刊: J. Phys. Soc. Jpn. 76
• 作者: M. Itoi;N. Kida;Chin-Lin;M. Koeda;N. Kojima;M. Hedo;Y. Uwatoko Y. Kobayashi;K. Asai;Y. Ohishi;M. Takata
• 通讯作者: M. Takata

SrRuO3薄膜の異常ホール効果

SrRuO3 薄膜中的反常霍尔效应

• 发表时间: 2006
• 作者: 小林義彦;岩田正俊;浅井吉蔵;佐藤桂輔;近藤正雄
• 通讯作者: 近藤正雄

二重ペロブスカイト型Co酸化物の光電子分光

双钙钛矿钴氧化物的光电子能谱

• 发表时间: 2009
• 作者: 西村淳一;齋藤智彦;小林義彦;浅井吉蔵;浜田典昭;仲武昌史;姜健;島田賢也;生天目博文;谷日雅樹;上田茂典;山下良之;吉川英樹;小林啓介
• 通讯作者: 小林啓介

Ba_xSr_<1-x>RuO_3の異常ホール効果と磁気構造

Ba_xSr_<1-x>RuO_3的反常霍尔效应与磁结构

• 发表时间: 2007
• 作者: 小林義彦;他
• 通讯作者: 他

High field magnetostriction of spin-state transition compound LaCoO_3

自旋态过渡化合物LaCoO_3的高场磁致伸缩

• 发表时间: 2008
• 期刊: Journal of the Physical Society of Japan 77
• 作者: K. Sato;M.I. Bartashevich;T. Goto;Y. Kobayashi;M. Suzuki;K. Asai;A. Matsuo;K. Kindo;Y. Kobayashi;T. Kawakami;K. Sato
• 通讯作者: K. Sato