Structure, magnetization, and resistivity of La1-xMxCoO3 (M = Ca, Sr, and Ba) -: art. no. 094417

被引：210

作者：

Kriener, M ^{[1
]}

Zobel, C ^{[1
]}

Reichl, A ^{[1
]}

Baier, J ^{[1
]}

Cwik, M ^{[1
]}

Berggold, K ^{[1
]}

Kierspel, H ^{[1
]}

Zabara, O ^{[1
]}

Freimuth, A ^{[1
]}

Lorenz, T ^{[1
]}

机构：

[1] Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany

来源：

PHYSICAL REVIEW B | 2004年 / 69卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.69.094417

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present an investigation of the influence of structural distortions in charge-carrier doped La1-xMxCoO3 by substituting La3+ with alkaline-earth metals of strongly different ionic sizes, that is, M=Ca2+, Sr2+, and Ba2+, respectively. We find that both the magnetic properties and the resistivity change nonmonotonically as a function of the ionic size of M. Doping La1-xMxCoO3 with M=Sr2+ yields higher transition temperatures to the ferromagnetically ordered states and lower resistivities than doping with either Ca2+ or Ba2+ having a smaller or larger ionic size than Sr2+, respectively. From this observation we conclude that the different transition temperatures and resistivities of La1-xMxCoO3 for different M (of the same concentration x) do not only depend on the varying chemical pressures. The local disorder due to the different ionic sizes of La3+ and M2+ plays an important role, too.

引用

页数：7

共 43 条

[1] NEUTRON-SCATTERING STUDY OF THE SPIN-STATE TRANSITION AND MAGNETIC CORRELATIONS IN LA1-XSRXCOO3 (X=0 AND 0.08) [J].