THERMODYNAMICAL PROPERTIES OF INCOMMENSURATE MAGNETIC SYSTEMS

被引：19

作者：

BLANCO, JA

GIGNOUX, D

MORIN, P

SCHMITT, D

机构：

[1] Laboratoire de Magnétisme Louis Néel, CNRS, Grenoble Cedex, 38042

[2] Universidad de Cantabria, Santander

来源：

EUROPHYSICS LETTERS | 1991年 / 15卷 / 06期

关键词：

MAGNETIC PHASE BOUNDARIES (INC MAGNETIC TRANSITIONS; METAMAGNETISM; ETC); CRITICAL-POINT EFFECTS; SPECIFIC HEATS; SHORT-RANGE ORDER;

D O I：

10.1209/0295-5075/15/6/019

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A thermodynamical analysis of second-order magnetic transitions in commensurate and incommensurate magnetic systems within a mean-field theory is presented. New and original results are obtained concerning the specific heat of amplitude-modulated magnetic structures; especially the specific-heat discontinuity at the ordering temperature T(N) is reduced by a factor of 2/3 with regard to that expected in ferro- or helimagnetic structures. In addition, under certain conditions, the maximum of specific heat at T(N) is shifted to a temperature below T(N). Recent experimental data on GdCu2Si2 and GdNi2Si2 compounds support quite well these peculiarities.

引用

页码：671 / 676

页数：6

共 18 条

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