Development of method for simultaneous determination of thermal transport properties and research for the electronic properties of Eu compounds

Eu化合物热传输特性同时测定方法的开发及电子特性研究

• 批准号: 23540418
• 负责人: HEDO Masato
• 金额: $ 3.24万
• 依托单位: University of the Ryukyus
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 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-23540418/
• 关键词: 価数転移; 高圧力; 電子状態; Eu化合物; 熱電能; 熱伝導率; 比熱; ドハース・ファンアルフェン効果

We developed a principled method for simultaneous determination under pressure of four values of transport properties: qualitative thermal conductivity and specific heat in addtion to electrical resistivity and thermopower.For Eu compounds, we grew single crystals and studied their electronic properties and searching for pressure-induced phase transition by measuring the de Haas van Alphen effect and pressure effect. We clarified pressure-induced valence transition above 6 GPa and observed a plausible emergence of the CDW under pressures for EuGa4. The nesting effect might be realized for peculiar quadratic prism-like Fermi surface and drive CDW in EuGa4. We reported that measured the thermal expansion, magnetic susceptibility, specific heat, and thermopower, and formed heavy fermion state in EuNi2P2.

我们开发了一种在四个传输特性的压力下同时测定的原理方法：定性导热率和电阻率和热电器的特异性热量。对于欧盟化合物，我们通过测量De Haas Van Alphen效应和压力效应来测量了压力诱导的相位过渡。我们阐明了压力诱导的价值高于6 GPA的价值转变，并观察到在EUGA4压力下CDW的出现。对于特殊的二次棱镜般的费米表面并在EUGA4中驱动CDW可能会实现嵌套效果。我们报告了测量热膨胀，磁化率，比热和热电器，并在EUNI2P2中形成了沉重的费米态。

项目成果

Effect of pressure on transport properties of CeIrIn5

• DOI: 10.1088/1742-6596/273/1/012058
• 发表时间: 2011
• 期刊: Journal of Physics: Conference Series
• 作者: Y. Takaesu;N. Aso;Y. Tamaki;M. Hedo;T. Nakama;K. Uchima;Y. Ishikawa;K. Deguchi;N. Sato

Fermi Surface and Magnetic Properties of Antiferromagnet EuBi3

反铁磁体 EuBi3 的费米表面和磁性

• DOI: 10.7566/jpsj.82.124708
• 发表时间: 2013
• 期刊: J. Phys. Soc. Jpn
• 作者: A. Nakamura;Y. Hiranaka;M. Hedo;T. Nakama;Y. Tatetsu;T. Maehira;Y. Miura;A. Mori;H. Tsutsumi;Y. Hirose;K. Mitamura;K. Sugiyama;M. Hagiwara;F. Honda;T. Takeuchi;Y. Haga;K. Matsubayashi;Y. Uwatoko;Y. Onuki
• 通讯作者: Y. Onuki

Heavy Fermion State Based on the Kondo Effect in EuNi2P2

• DOI: 10.7566/jpsj.82.083708
• 发表时间: 2013-08-01
• 期刊: JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
• 影响因子: 1.7
• 作者: Hiranaka, Yuichi;Nakamura, Ai;Onuki, Yoshichika
• 通讯作者: Onuki, Yoshichika

森晶宣, 三田村勝哉, 三浦泰直, 堤泰樹, 広瀬雄介, 竹内徹也, 杉山清寛, 本多史憲, 大貫惇睦, 仲村愛, 辺土正人, 仲間隆男

森秋纪、三田村克也、三浦康直、堤泰希、广濑佑介、竹内哲也、杉山清博、本田文则、大贯敦、中村爱、边户雅人、仲间隆夫

• 作者: 武藤知 輝;他;道村真司 ;伊賀文俊;EuSn3 の強磁場磁化とドハース・ファンアルフェン効果
• 通讯作者: EuSn3 の強磁場磁化とドハース・ファンアルフェン効果

Pressure-induced changes in the magnetic and valence state of EuFe2As2

• DOI: 10.1103/physrevb.84.024502
• 发表时间: 2011-07-05
• 期刊: PHYSICAL REVIEW B
• 影响因子: 3.7
• 作者: Matsubayashi, K.;Munakata, K.;Uwatoko, Y.
• 通讯作者: Uwatoko, Y.