Exploration of novel quantum phases by angle resolved NMR measurements under hugh pressure

通过高压力下角分辨核磁共振测量探索新型量子相

• 批准号: 21340093
• 负责人: TAKIGAWA Masashi
• 金额: $ 11.98万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009-04-01 至 2013-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21340093/
• 关键词: 核磁気共鳴; 高圧技術; 強相関電子系; 量子スピン系; 量子相転移

We have developed a new type of opposed-anvil pressure cell for nuclear magnetic resonance experiments capable of producing more than 10 GPa. This cell has the following advantages: 1. Highly homogeneous pressure can be obtained by using Ar (introduced as liquid at a low temperature) as pressure medium. 2. Measurements of fluorescence from ruby placed in the sample space by using optical fiber introduced inside the anvil allows in-situ calibration of the pressure. 3. The whole cell can be rotated in the superconeducting magnet allowing arbitrary alignment of the crystal along the external magnetic field. By using this pressure cell we discovered new ordered phases such as coexistence of the antiferromagnetism and superconductivity in the iron based material SrFe2As2.

我们已经开发了一种新型的相反 - 洋电压细胞，用于产生超过10 GPA的核磁共振实验。该单元具有以下优点：1。可以通过使用AR（在低温下作为液体引入）作为压力培养基获得高度均匀的压力。 2。通过使用砧内引入的光纤在样品空间中放置在样品空间中的Ruby的荧光测量，可以对压力进行原位校准。 3。整个细胞可以在超注册磁体中旋转，从而使晶体沿外部磁场进行任意比对。通过使用这种压力电池，我们发现了新的有序阶段，例如基于铁的材料SRFE2AS2中的抗铁磁性和超导性的共存。

项目成果

Incomplete devil's staircase in the magnetization process of Sr_2Cu_2(BO_3)_2

Sr_2Cu_2(BO_3)_2磁化过程中不完全魔鬼阶梯

• 发表时间: 2012
• 作者: T.Yajima;et al.;M. Takigawa
• 通讯作者: M. Takigawa

Isomorphic structural transition in the β-pyrochlore oxide superconductor KOs_2O_6

β-烧绿石氧化物超导体KOs_2O_6的同构结构转变

• 发表时间: 2010
• 期刊: J.Phys.Soc.Jpn.
• 作者: J.Yamaura;M.Takigawa;O.Yamamuro;Z.Hiroi
• 通讯作者: Z.Hiroi

Space Efficient Opposed-Anvil High-Pressure Cell and Its Application to Optical and NMR Measurements up tp 9 GPa

空间高效的对置砧高压池及其在高达 9 GPa 的光学和 NMR 测量中的应用

• 发表时间: 2010
• 期刊: J.Phys.Soc.Jpn.
• 作者: K;Kitagawa;H.Gotou;T.Yagi;A.Yamada,T.Matsumoto;Y.Uwatoko;M.Takigawa
• 通讯作者: M.Takigawa

Space Efficient Opposed-Anvil High-Pressure Cell and Its Application to Optical and NMR Measurements up to 9 GPa

• DOI: 10.1143/jpsj.79.024001
• 发表时间: 2010-02-01
• 期刊: JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
• 影响因子: 1.7
• 作者: Kitagawa, Kentaro;Gotou, Hirotada;Takigawa, Masashi
• 通讯作者: Takigawa, Masashi

Novel Ordered Phases in the Orthogonal Dimer Spin System SrCu_2(BO_3)_2

正交二聚体自旋系统SrCu_2(BO_3)_2中的新型有序相

• DOI: 10.1143/jpsj.79.011005
• 发表时间: 2010
• 期刊: J. Phys. Soc. Jpn
• 作者: M. Takigawa;T. Waki;M. Horvatic;and C.Berthier
• 通讯作者: and C.Berthier