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
复合体系AgδLa0.60Sr0.40-xAgx-δMnO3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. 华北科技学院基础部, 河北 廊坊 10160;
3. 河北师范大学物理科学与信息工程学院, 河北 石家庄 050024 -
DOI：
On the Magnetoresistance in Ag_δLa_(0.60)Sr_(0.40-x)Ag_(x-δ)MnO_3
摘要/Abstract
摘要：
采用溶胶-凝胶法(sol-gel)制备了名义组分为AgδLa0.60Sr0.40-xAgx-δMnO3的多晶样品.研究发现,用Ag+替代Sr2+后,样品的居里温度降至室温附近,并且室温磁电阻比替代前明显增大.在1.8T的磁场下,x=0.30的样品在289K时,Rm=17.0%,因此提高了室温时样品的磁电阻.
Abstract：
The polycrystalline samples AgδLa0.60Sr0.40-xAgx-δMnO3were synthesized by sol-gel method.It was found that when Sr2+ ions were partly substituted by Ag+ ions,the Curie temperature of substituted samples decreased to room temperature and the room temperature magnetoresistance(MR) increased obviously than un-substituted La0.60Sr0.40-xAgx-δMnO3.Under an applied filed of 1.8 T,there was a maximum MR with 17 % at 289 K for the sample with x=0.30.Therefore the room temperature magnetoresistance were highly improved.
关键词
Key words：
perovskite manganite
;
magnetoresistance
;
sol-gel method