| La0.60Sr0.20K0.20-yyMnO3系列材料的磁电阻效应 |
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| 引用本文： | 赵福伟,唐贵德.La0.60Sr0.20K0.20-yyMnO3系列材料的磁电阻效应[J].河北师范大学学报(自然科学版),2012,36(1):49-53. |
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| 作者姓名： | 赵福伟 唐贵德 |
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| 作者单位： | 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 |
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| 基金项目： | 河北省自然科学基金，河北省基础研究重点项目 |
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| 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.
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| 关 键 词： | 钙钛矿锰氧化物 磁电阻 溶胶-凝胶法 |
Study on the Magnetoresistance in La0.60Sr0.20K0.20-yyMnO3 |
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| ZHAO Fuwei
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TANG Guide.Study on the Magnetoresistance in La0.60Sr0.20K0.20-yyMnO3[J].Journal of Hebei Normal University,2012,36(1):49-53. |
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| Authors: | ZHAO Fuwei TANG Guide |
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| Institution: | 1.Teaching Affair Office,Hebei Engineering and Technical College,Hebei Cangzhou 061001,China;2.College of Physics Science and Information Engineering,Hebei Normal University,Hebei Shijiazhuang 050024,China) |
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| 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. |
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| Keywords: | perovskite manganite magnetoresistance sol-gel method |
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