Pressure induced crossover of the magnetic transition from second to first order near the quantum critical point in MnSi

被引：59

作者：

Pfleiderer, C. ^{[1
]}

McMullan, G. J. ^{[1
]}

Lonzarich, G. G. ^{[1
]}

机构：

[1] Cavendish Lab, Cambridge CB3 0HE, England

来源：

PHYSICA B-CONDENSED MATTER | 1995年 / 206卷

关键词：

D O I：

10.1016/0921-4526(94)00604-T

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The magnetic ordering transition temperature in MnSi decreases with increasing pressure and tends towards absolute zero near 15 kbar. As the critical pressure is approached, we observe a crossover from a conventional transition of second order to one of weak first order. The crossover point is found to be near a minimum in the inverse susceptibility as a function of temperature. A qualitative description of this behaviour is given in terms of a temperature dependent renormalisation of the coefficients in a sixth order Landau expansion for the free energy.

引用

页码：847 / 849

页数：3

共 13 条

[11] QUANTITATIVE ASPECTS OF THE THEORY OF WEAK ITINERANT FERROMAGNETISM [J].