Experimental investigation of quantum phase transition on one-dimensional spin gapped system
Experimental investigation of quantum phase transition on one-dimensional spin gapped system
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
中文摘要
我们研究了一个典型的S=1/2海森堡交替自旋链系统:五氟苯基硝酰基氮氧化物(F_5PNN)和一个具有两个临界场区的新磁系统;(CH_3)_2NH_2CuCl_3(DMACuCl_3)研究了自旋能隙体系的场致相变和Tomonaga-Luttinger液相。在T= 250 mK以下,我们发现了一个在Hc_1 = 3 T和Hc_2 =6.5T之间的场致磁有序。观察到的特征行为取决于磁场Hc 2以上的H-T相边界外的场诱导相。比热随温度和磁场的变化与S=1/2自旋能隙系统的理论计算结果定性一致,DMACuCl_3在低于Hc_1 = 2 T时观察到自发磁有序,而在Hc_1 = 2 T到Hc_2 =3.5T的1/2磁化平台区没有磁有序.磁场诱导的磁有序在H_c ~ 2 =3.5T以上出现,并随着磁场的增加而增加,直到H= 8 T。
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.
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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.
DOI:
10.1103/physrevlett.95.057201
发表时间:
2005-07
期刊:
Physical review letters
影响因子:
8.6
作者:
[X. G. Zheng;H. Kubozono;K. Nishiyama;W. Higemoto;T. Kawae;A. Koda;C. N. Xu]
通讯作者:
X. G. Zheng;H. Kubozono;K. Nishiyama;W. Higemoto;T. Kawae;A. Koda;C. N. Xu
共 14 条
Development of Genuine-Organic Ferromagnets with High Transition Temperature
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批准号:12640558
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项目类别:Grant-in-Aid for Scientific Research (C)
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资助金额:$2.3万
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财政年份:2000
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负责人:HITAKA Masako
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依托单位: