Size and field effect on mesoscopic spin glass

被引：2

作者：

Komatsu, K.

Maki, H.

Taniyama, T.

Sato, T.

机构：

[1] Keio Univ, Fac Sci & Technol, Dept Appl Phys & Phys Infomat, Yokohama, Kanagawa 223, Japan

[2] Tokyo Inst Technol, Mat & Struct Lab, Midori Ku, Yokohama, Kanagawa 2268503, Japan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2007年 / 310卷 / 02期

关键词：

spin glass; aging; droplet; fine pariticle; mesoscopic; domain; magnetic field;

D O I：

10.1016/j.jmmm.2006.10.640

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Spin glass particles were prepared as the mesoscopic system in order to examine the space scale of spin glass domain (droplet). The peak temperature T-peak in the temperature-dependent magnetization is systematically reduced with decreasing average particle size. This is due to the imitation of droplet growth to the particle diameter. The magnetic field H also decreases T-peak, which is caused by the reduction of the barrier height by Zeeman energy. However, there appears different tendency in the relation between H and T-peak below 100 Oe. This indicates the existence of crossover between the two regimes in which the free energy and Zeeman energy govern the droplet excitation. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：1500 / 1502

页数：3