Semiconductor-metal transition and magnetoresistance in (La,Ca)MnO3: Experiments and simple model

被引：29

作者：

Pierre, J

Robaut, F

Misat, S

Strobel, P

Nossov, A

Ustinov, V

Vassiliev, V

机构：

[1] CNRS,CRISTALLOG LAB,F-38042 GRENOBLE 09,FRANCE

[2] CEA,DEPT RECH FONDAMENTALE MAT CONDENSEE,F-38054 GRENOBLE 09,FRANCE

[3] RUSSIAN ACAD SCI,INST MET PHYS,EKATERINBURG 620219,RUSSIA

[4] RUSSIAN ACAD SCI,INST SOLID STATE CHEM,EKATERINBURG 620219,RUSSIA

[5] RUSSIAN ACAD SCI,INST PHYS MET,EKATERINBURG 620219,RUSSIA

来源：

PHYSICA B | 1996年 / 225卷 / 3-4期

关键词：

D O I：

10.1016/0921-4526(96)00290-6

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The effect of Ca-doping on bulk samples of La1-xCaxMnO3 has been investigated, as well as the effect of sample annealing under air and oxygen. The maximum magnetoresistance is observed for ferromagnetic samples, with La0.67Ca0.33MnO3 composition, annealed at an optimum temperature of 1200 degrees C. A simple phenomenological model has been used which describes the magnetic and transport properties as resulting from an exchange-induced band-crossing SC-metal transition.

引用

页码：214 / 224

页数：11

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