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

页码：1494 / 1499

页数：6