节点文献

La_2/3Sr_1/3MnO₃/NiFe₂O₄复合多晶材料的磁电阻效应

Magnetoresistance of La_2/3Sr_1/3MnO₃/NiFe₂O₄ Composites

推荐 CAJ下载
PDF下载
不支持迅雷等下载工具，请取消加速工具后下载。

【Author】 ZHANG Bian-fang~1,LIU Li-hu~2,MEI Shi-gang~3,LI Tong-kai~1,JI Jian-li~1,DENG Yu-lin~1(1.Department of Mathematics and Physics,Shijiazhuang Railway University,Hebei Shijiazhuang 050043,China;2.College of Physcis Science and Information Engineering,Hebei Normal University,Hebei Shijiazhuang 050016,China;3.Department of Materoa;Science and Engineering,Shijiazhuang Railway University,Hebei Shijiazhuang 050043,China)

【机构】石家庄铁道学院数理系；河北师范大学物理科学与信息工程学院；石家庄铁道学院材料科学与工程分院；石家庄铁道学院数理系河北石家庄050043；河北石家庄050016；河北石家庄050043；

【摘要】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%.更多还原

【Abstract】 NiFe₂O₄ polycrystalline powers were prepared by Chemical coprecipitation method.La_2/3Sr_1/3MnO₃ polycrystalline powers were prepared by sol-gel method.(La_2/3Sr_1/3MnO₃)_1-x（NiFe₂O₄）_x series polycrystalline samples were prepared by pressureless sintering.Under a magnetic filed of 1.8×10⁷?A/m,the maximum value of MR is 29?% for the sample with x=0 at 370?K.The maximum MR value of (La_2/3Sr_1/3MnO₃)_0.9（NiFe₂O₄）_0.1 is about 35?% at 335?K.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.更多还原