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Experimental investigation of quantum phase transition on one-dimensional spin gapped system

Experimental investigation of quantum phase transition on one-dimensional spin gapped system
一维自旋带隙体系量子相变的实验研究
批准号:
17540331
负责人:
HITAKA Masako
金额:
$2.24万
依托单位:
依托单位国家:
日本
项目类别:
Grant-in-Aid for Scientific Research (C)
财政年份:
2005
资助国家:
日本
项目状态:
已结题
起止时间:
2005 至 2006

项目摘要

项目成果

HITAKA Masako的其他基金

相关文献

中文摘要
翻译
研究了典型的S=1/2海森堡交替自旋链体系;五氟苯基硝基氮氧化物(F_5PNN)和具有两个临界磁场区的新型磁系统;(CH_3)_2NH_2CuCl_3 (DMACuCl_3)研究了自旋间隙体系的场诱导相变和Tomonaga-Luttinger液相。在F_5PNN中,我们发现在T=250mK下,Hc1=3T和Hc2=6.5T之间存在场感应磁有序。在磁场感应相的H-T相边界外,观察到的特征行为取决于高达Hc2以上的磁场。在S=1/2自旋间隙体系中,比热对温度和场的依赖关系与理论计算结果在定性上是一致的。在DMACuCl_3中,在Hc1=2T以下存在自发磁有序,而在Hc1=2T至Hc2 =3.5T的1/2磁化平台区不存在磁有序。在Hc2=3.5T以上出现磁场感应磁有序现象,直至H=8T,磁场感应磁有序随着磁场的增大而增大。
英文摘要
We have studied a typical S=1/2 Heisenberg alternating spin chain system ; pentafulorophenyl nitronyl nitroxide (F_5PNN) and a novel magnetic system with two critical field regios ; (CH_3)_2NH_2CuCl_3 (DMACuCl_3) to investigate field induced phase transitions and Tomonaga-Luttinger liquid phase in spin-gapped system.In F_5PNN, we found a field induced magnetic ordering between Hc1=3T and Hc2=6.5T below T=250mK. Characteristic behaviors are observed depending on the magnetic field up to above Hc2 outside of the H-T phase boundary for the field induced phase. The temperature and field dependence of the specific heat are qualitatively in good agreement with the theoretical calculation on an S=1/2 spin gapped system.In DMACuCl_3,a spontaneous magnetic ordering is observed below Hc1=2T, while no magnetic ordering is in the 1/2 magnetization plateau field region from Hc1=2T to Hc2 =3.5T. A field induced magnetic ordering emerges above Hc2=3.5T, which grows with increasing magnetic field up to H=8T.
期刊论文(20)
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科研奖励(0)
会议论文
DOI: 10.1103/physrevb.72.024435
发表时间: 2005-07
期刊: Physical Review B
影响因子: 3.7
作者: [K. Takeda*;Y. Yoshida;Y. Inanaga;T. Kawae;D. Shiomi;T. Ise;M. Kozaki;K. Okada;Kazunobu Sato;T. Takui]
通讯作者: K. Takeda*;Y. Yoshida;Y. Inanaga;T. Kawae;D. Shiomi;T. Ise;M. Kozaki;K. Okada;Kazunobu Sato;T. Takui
Molecular Field and Monte Carlo Study for the Mixed-Spin Axial Next-Nearest-Neighbor Ising Model
混合自旋轴向次近邻伊辛模型的分子场和蒙特卡罗研究
DOI: --
发表时间: 2006
期刊: Phys.Rev.B 73
影响因子: --
作者: [T.Kasama, Y.Muraoka, T.Idogaki]
通讯作者: T.Idogaki
Specific Heat Study of an S=1/2 Alternating Heisenberg Spin Chain System : F_5PNN in a Magnetic Field
S=1/2 交替海森堡自旋链系统的比热研究:磁场中的 F_5PNN
DOI: --
发表时间: 2005
期刊: Physical Review Letters 94
影响因子: --
作者: [Y.Yoshida, N.Tateiwa, M.Mito, T.Kawae 他]
通讯作者: T.Kawae 他
Specific Heat Study on a Novel Spin-Gapped System : (CH3)2NH2CuCl3
新型自旋间隙体系的比热研究:(CH3)2NH2CuCl3
DOI: --
发表时间: 2005
期刊: Journal of the Physical Society of Japan 74巻・11号
影响因子: --
作者: [S.Masaki, T.Mito, S.Wada, N.Takeda, D.Kikuchi, H.Sato, H.Sugawara, Guo-qing Zheng, Y.Yoshida et al.]
通讯作者: Y.Yoshida et al.
共 14 条
    Development of Genuine-Organic Ferromagnets with High Transition Temperature
    • 批准号:
      12640558
    • 项目类别:
      Grant-in-Aid for Scientific Research (C)
    • 资助金额:
      $2.3万
    • 财政年份:
      2000
    • 负责人:
      HITAKA Masako
    • 依托单位: