PRESSURE EFFECT ON THE DOUBLE-EXCHANGE FERROMAGNET LA1-XSRXMNO3 (0.15-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-0.5)

被引：296

作者：

MORITOMO, Y ^{[1
]}

ASAMITSU, A ^{[1
]}

TOKURA, Y ^{[1
]}

机构：

[1] UNIV TOKYO, DEPT PHYS, TOKYO 113, JAPAN

来源：

PHYSICAL REVIEW B | 1995年 / 51卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.51.16491

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of hydrostatic pressure on the magnetic and electronic properties has been investigated for prototypical double-exchange ferromagnets, La1-xSrxMnO3, with varying nominal hole concentration x (0.15≤x≤0.5). A pressure-enhanced transfer interaction is observed to stabilize the ferromagnetic metallic phase, i.e., increase the Curie temperature TC, over the whole concentration range investigated. The pressure coefficient of TC is found to be significantly x dependent and steeply decreases from d lnTC/dP+0.065 GPa-1 at x=0.15 to a small value (+0.005 GPa-1) at x=0.4-0.5. This suggests a symptomatic change of the electronic nature from the strong- to weak-coupling region with increasing the hole-doping level. © 1995 The American Physical Society.

引用

页码：16491 / 16494

页数：4

共 25 条

[1] CONSIDERATIONS ON DOUBLE EXCHANGE [J].