Structural, magnetic, and electrical properties of single-crystalline La1-xSrxMnO3 (0.4<x<0.85) -: art. no. 094410
Structural, magnetic, and electrical properties of single-crystalline La1-xSrxMnO3 (0.4<x<0.85) -: art. no. 094410
复制标题
DOI：
10.1103/physrevb.66.094410
复制
发表时间：
2002-09-01
影响因子：
3.7
通讯作者：
Loidl, A
中科院分区：
文献类型：
--
作者：
Hemberger, J;Krimmel, A;Loidl, A
本文报道了掺锶LaMnO_3单晶的结构、磁性和电学性质，掺杂浓度为0.4 ≤ tox ≤ 0.85。复杂的结构和磁相图只能解释假设从轨道自由度的显着贡献。接近于x=0.6，铁磁金属之后是低于200 K的反铁磁金属相。这种反铁磁金属相存在于单斜晶体结构中。根据理论预测，这种金属反铁磁体有望显示出（x（2）-y（2））型轨道序。对于较高的Sr浓度的反铁磁绝缘体是建立低于室温。
We report on structural, magnetic, and electrical properties of Sr-doped LaMnO3 single crystals for doping levels 0.4less than or equal toxless than or equal to0.85. The complex structural and magnetic phase diagram can only be explained assuming significant contributions from the orbital degrees of freedom. Close to x=0.6 a ferromagnetic metal is followed by an antiferromagnetic metallic phase below 200 K. This antiferromagnetic metallic phase exists in a monoclinic crystallographic structure. Following theoretical predictions this metallic antiferromagnet is expected to reveal an (x(2)-y(2))-type orbital order. For higher Sr concentrations an antiferromagnetic insulator is established below room temperature.