Electrical and magnetic properties of (Ca(1-x)A(x))(2)MnO4 (A=La and Na)

被引：12
|
作者：
Yamashita, T [1 ]
Kubo, K [1 ]
Nakao, K [1 ]
Sakurai, T [1 ]
Ikegawa, S [1 ]
Sugiyama, J [1 ]
Yamauchi, H [1 ]
机构：
[1] INT SUPERCONDUCT TECHNOL CTR,SUPERCONDUCT RES LAB,KOTO KU,TOKYO 135,JAPAN
来源：
PHYSICAL REVIEW B | 1996年 / 53卷 / 21期
关键词：
D O I：
10.1103/PhysRevB.53.14470
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Electrical and magnetic properties of (Ca(1-x)A(x))(2)MnO4 (A=La and Na) have been studied. When a certain amount of La is doped to the Ca site, i.e., electrons are doped, antiferromagnetically ordered magnetic moments are canted and show spontaneous magnetization below 115 K. Electrical conduction is dominated by thermally activated electrons above 115 K, and by hopping electrons below 115 K. The Na doped or hole doped samples (Ca,Na)(2)MnO4 also exhibit spontaneous magnetization below 115 K. The electrical conduction mechanism in (Ca,Na)(2)MnO4 is the same as that in (Ca,La)(2)MnO4. However, when a low magnetic field (<30 Oe) is applied to a (Ca,Na)(2)MnO4 sample, the magnetic susceptibility becomes negative below 40 K.
引用
收藏
页码：14470 / 14474
页数：5
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