Absence of phase transition in a magnetic field in the Fe0.55Mn0.45TiO3 Ising spin glass

被引：8
|
作者：
Jonsson, Petra E.
Takayama, H.
Katori, H. Aruga
Ito, A.
机构：
[1] Uppsala Univ, Dept Phys, SE-75121 Uppsala, Sweden
[2] Univ Tokyo, ISSP, Kashiwa, Chiba 2778581, Japan
[3] RIKEN, Wako, Saitama 3510198, Japan
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2007年 / 310卷 / 02期
关键词：
spin glass; critical dynamics; droplet picture; AC susceptibility; field-cooled magnetization;
D O I：
10.1016/j.jmmm.2006.10.879
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We present dynamical magnetic properties in the presence of a static bias field on the 3d Ising spin glass (SG) Fe0.55Mn0.45TiO3. It exhibits critical dynamics only in zero field, suggesting that there is no Almeida-Thouless line for Ising SGs. Instead a dynamical crossover scenario, based on the real-space droplet picture, can explain the in-field magnetic properties. We also interpret the glassy nature of the field-cooled magnetization in accordance with the real-space picture. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：1494 / 1499
页数：6
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