SrFeO2.95:: A helical antiferromagnet with large magnetoresistance -: art. no. 024414

被引：43
|
作者：
Zhao, YM [1 ]
Mahendiran, R
Nguyen, N
Raveau, B
Yao, RH
机构：
[1] Shantou Univ, Dept Phys, Shantou 515063, Guangdong, Peoples R China
[2] ISMRA, Lab CRISMAT, CNRS, UMR 6508, F-14050 Caen, France
[3] Univ Caen, F-14050 Caen, France
来源：
PHYSICAL REVIEW B | 2001年 / 64卷 / 02期
关键词：
D O I：
10.1103/PhysRevB.64.024414
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Resistivity, magnetoresistance, and Mossbauer effect of metallic spiral antiferromagnet SrFeO2.95 have been examined in the temperature range 4.5-300 K. A large negative magnetoresistance below 50 K is observed. We find hysteresis in resistivity in 0 and 9 T due to the coexistence of antiferromagnetic and paramagnetic domains in the temperature region 50-80 K. Our result shows two contributions to magnetoresistance: one below 50 K that is due to helical-conical spin transformation and another close to TN that is due to reduced spin fluctuation under magnetic field.
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页数：5
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