期刊信息
- 刊名： 河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
- 主办： 河北师范大学
- ISSN： 1000-5854
- CN： 13-1061/N
- 中国科技核心期刊
- 中国期刊方阵入选期刊
- 中国高校优秀科技期刊
- 华北优秀期刊
- 河北省优秀科技期刊
La0.60Sr0.20K0.20-yyMnO3系列材料的磁电阻效应
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1. 河北工程技术高等专科学校教务处, 河北沧州 061001;
2. 河北师范大学物理科学与信息工程学院, 河北石家庄 050024 -
DOI：
Study on the Magnetoresistance in La0.60Sr0.20K0.20-yyMnO3
摘要/Abstract
摘要：
利用溶胶-凝胶法制备了La0.60Sr0.20K0.20-yyMnO3(y=0,0.03,0.05,0.07)的类钙钛矿型稀土锰氧化物多晶样品.研究发现,引入离子空位后,样品CMR的温度稳定性得到改善.在1.8 T的磁场下,样品y=0.03,0.05,T=220~320 K时,其CMR值保持在4.7%(±0.2%)左右,温度稳定性较好.
Abstract：
The perovskite rare earth manganites polycrystalline samples La0.60Sr0.20K0.20-yyMnO3(y=0,0.03,0.05,0.07)were synthesized by sol-gel method.It is found that the vacancy-doping for the material can remarkably improve the CMR temperature stability of this kind material.Under an applied magnetic filed of 1.8 T,the MR vaule for the sample with y=0.03 and y=0.05 is about 4.7%(±0.2%)in the temperature range between 220 K and 320 K,so its temperature stability is better.
关键词
Key words：
perovskite manganite
;
magnetoresistance
;
sol-gel method