Giant magnetoresistance in layered manganese pnictide CaMnBi2

被引：56

作者：

He, J. B. ^{[1
]}

Wang, D. M. ^{[1
]}

Chen, G. F. ^{[1
,2
,3
]}

机构：

[1] Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China

[2] Chinese Acad Sci, Inst Phys, Natl Lab Superconduct, Beijing 100190, Peoples R China

[3] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 11期

关键词：

CU-O SYSTEM; CRYSTAL-STRUCTURE; IRON PNICTIDES; SUPERCONDUCTIVITY; BA;

D O I：

10.1063/1.3694760

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the physical properties of a layered transition metal pnictide, CaMnBi2, which has a crystal structure similar to that of the superconducting iron pnictides. This compound is a bad metal with a long-range antiferromagnetic order at T-N = 270 K. The linear temperature dependence of magnetic susceptibility above T-N suggests that strong antiferromagnetic correlations exist in the paramagnetic state. A linear magnetic field dependence of the magnetoresistance implies the existence of the linear energy dispersion, which may result in the giant in-plane magnetoresistance (about 105% in 10 T at 2.5 K for H parallel to c). The results of de Haas-van Alphen effect are consistent with the presence of Dirac fermions. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3694760]

引用

页数：4

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