| Irreversible Colossal Magnetoresistance in La0.58Dy0.09Ca0.33MnO3 |
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| 作者姓名： | BaoxinHUANC YihuaLIU RuzhenZHANG VouyongDAI ChengjianWANG XiaoboYUAN LiangmoMEI |
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| 作者单位： | DepartmentofPhysicsandStateKeyLaboratoryofCrystalMaterials,ShandongUniversity,Ji‘nan250100,China |
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| 摘 要： | The representative sample La0.58Dy0.09Ca0.33MnO3 of Dy doped La0.67Ca0.33MnO3 rare-earth manganites was investigated.The most important effect of Dy doping is to introducethe magnetoimpurity and form the spin clusters which induce dramatically large CMR in Lao.58Dyo.09Cao.33MnO3. The fitting results of field-induced resistivity decrease to the Brillouin function indicate that the CMR is caused by the spin dependent hopping between spin clusters. It is the magnetic field that reduces the size of spin clusters and induces a field-induced irreversible CMR behaviour.
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| 关 键 词： | 磁致电阻 La0.58Dy0.09Ca0.33MnO3 镧 镝 钙 锰 |
Irreversible Colossal Magnetoresistance in La0.58Dy0.09Ca0.33MnO3 |
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| BaoxinHUANC YihuaLIU RuzhenZHANG VouyongDAI ChengjianWANG XiaoboYUAN LiangmoMEI.Irreversible Colossal Magnetoresistance in La0.58Dy0.09Ca0.33MnO3[J].Journal of Materials Science & Technology,2003,19(6):622-624. |
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| Authors: | Baoxin HUANG Yihua LIU Ruzhen ZHANG Youyong DAI Chengjian WANG Xiaobo YUAN Liangmo MEI |
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| Affiliation: | Department of Physics and State Key Laboratory of Crystal Materials, Shandong University, Ji'nan 250100, China} |
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| Abstract: | The representative sample La0.58Dy0.09Ca0.33MnO3 of Dy doped La0.67Ca0.33MnO3 rare-earth manganites was investigated. The most important effect of Dy doping is to introduce the magnetoimpurity and form the spin clusters which induce dramatically large CMR in La0.58Dy0.09Ca0.33MnO3. The fitting results of field-induced resistivity decrease to the Brillouin function indicate that the CMR is caused by the spin dependent hopping between spin clusters. It is the magnetic field that reduces the size of spin clusters and induces a field-induced irreversible CMR behaviour. |
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| Keywords: | Spin cluster Magnetoimpurity Colossal magnetoresistance |
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