| Magnetic Coupling in La0.67 Ca0.33 MnO3／La0.67 Sr0.33 CoO3／La0.67 Ca0.33MnO3 Trilayer Films |
| |
| 引用本文： | 赵昆,李昊,黄康权.Magnetic Coupling in La0.67 Ca0.33 MnO3／La0.67 Sr0.33 CoO3／La0.67 Ca0.33MnO3 Trilayer Films[J].中国稀土学报(英文版),2004,22(6):887-890. |
| |
| 作者姓名： | 赵昆 李昊 黄康权 |
| |
| 作者单位： | [1]DepartmentofPhysics,ChineseUniversityofHongKong,HongKong00852,China [2]MagnetoelectronicsLaboratory,SchoolofPhysicsScienceandInformationTechnology,LiaochengUniversity,Liaocheng252059,China／／DepartmentofPhysics,ChineseUniversityofHongKong,HongKong00852,China |
| |
| 基金项目： | the Key Project of Research Foundation of Shandong Provincial Education Department of China，the Key Project of Research Foundation of Department of Science and Technology of Shandong Province of China，香港研究资助局资助项目 |
| |
| 摘 要： | The perovskite La0.67 Ca0.33 MnO3/La0.67 Sr0.33 CoO3/La0.67 Ca0.33 MnO3 trilayers were fabricated by a facing-target sputtering technique and their magnetotransport properties were investigated. The magnetoresistance is dependent on spacer thickness and dramatically decreases when La0.67 Sr0.33 CoO3 layer is thick enough because of its short-circuiting effect. Different from La0.67 Ca0.33 MnO3 single layer, trilayer films with thin La0.67 Sr0.33 CoO3 spacer have the enhanced metal-semiconductor transition temperature (TMS) of La0.67 Ca0.33 MnO3 layers. The magnetic coercivity Hc shows a nonmonotonic behavior with changing the spacer layer thickness at 230 K. The waist-like hysteresis indicates that there is an indirect exchange coupling between the top and bottom Lao.67 Ca0.33 MnO3 layers across the spacer La0.67 Sr0.33 CoO3 layer.
|
| 关 键 词： | 磁阻系数 磁耦合 稀土元素 滞后回线 三层薄膜 化学成分 镧 |
Magnetic Coupling in La0.67Ca0.33MnO3/La0.67Sr0.33CoO3/La0.67Ca0.33 MnO3 Trilayer Films |
| |
| Zhao Kun Li Hao,Wong Hongkuen.Magnetic Coupling in La0.67Ca0.33MnO3/La0.67Sr0.33CoO3/La0.67Ca0.33 MnO3 Trilayer Films[J].Journal of Rare Earths,2004,22(6):887-890. |
| |
| Authors: | Zhao Kun Li Hao Wong Hongkuen |
| |
| Affiliation: | Zhao Kun Li Hao,Wong Hongkuen~2 |
| |
| Abstract: | The perovskite La0.67Ca0.33MnO3/La0.67Sr0.33CoO3/La0.67Ca0.33MnO3 trilayers were fabricated by a facing-target sputtering technique and their magnetotransport properties were investigated. The magnetoresistance is dependent on spacer thickness and dramatically decreases when La0.67Sr0.33CoO3 layer is thick enough because of its short-circuiting effect. Different from La0.67Ca0.33MnO3 single layer, trilayer films with thin La0.67Sr0.33CoO3 spacer have the enhanced metal-semiconductor transition temperature (TMS) of La0.67Ca0.33MnO3 layers. The magnetic coercivity HC shows a nonmonotonic behavior with changing the spacer layer thickness at 230 K. The waist-like hysteresis indicates that there is an indirect exchange coupling between the top and bottom La0.67Ca0.33MnO3 layers across the spacer La0.67Sr0.33CoO3 layer. |
| |
| Keywords: | colossal magnetoresistance hysteresis loop magnetic coupling rare earths |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
