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
La2/3Sr1/3MnO3/NiFe2O4复合多晶材料的磁电阻效应
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1. 石家庄铁道学院 数理系, 河北 石家庄 050043;
2. 河北师范大学 物理科学与信息工程学院, 河北 石家庄 050016;
3. 石家庄铁道学院 材料科学与工程分院, 河北 石家庄 050043 -
DOI：
Magnetoresistance of La2/3Sr1/3MnO3/NiFe2O4 Composites
摘要/Abstract
用化学共沉淀法制备了NiFe2O4粉体样品,采用溶胶-凝胶(sol-gel)法制备了La2/3Sr1/3MnO3的多晶样品.用无压烧结制备了名义组分为(La2/3Sr1/3MnO3)1-x(NiFe2O4)x(x=0,0.05,0.10,0.20)的多晶样品.在1.8×107A/m磁场作用下,当x=0时,样品的磁电阻随温度几乎成线性变化;当x=0.10时,样品在335 K时出现峰值,磁电阻值达35%.
NiFe2O4 polycrystalline powers were prepared by Chemical coprecipitation method.La2/3Sr1/3MnO3 polycrystalline powers were prepared by sol-gel method.(La2/3Sr1/3MnO3)1-x(NiFe2O4)x series polycrystalline samples were prepared by pressureless sintering.Under a magnetic filed of 1.8×107A/m,the maximum value of MR is 29% for the sample with x=0 at 370K.The maximum MR value of (La2/3Sr1/3MnO3)0.9(NiFe2O4)0.1 is about 35% at 335K.The MR value is enhanced,which is important for the application of this kind of magnetoresistance material.The exact mechanism of this phenomenon needs further study.