| Cr掺杂对La0.67Ca0.33MnO3物性的影响 |
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| 引用本文： | 彭振生,孙阳. Cr掺杂对La0.67Ca0.33MnO3物性的影响[J]. 安徽师范大学学报(自然科学版), 2003, 26(1): 22-25 |
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| 作者姓名： | 彭振生 孙阳 |
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| 作者单位： | 1. 宿州师范专科学校,安徽,宿州,234000
2. 中国科学技术大学,结构分析开放实验室,安徽,合肥,230026 |
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| 基金项目： | 国家自然科学基金;19934003; |
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| 摘 要： | 本文研究了Cr掺杂对La0.67Ca0.33MnO3物性的影响。探讨了Cr掺杂对晶体结构的影响、Cr掺杂对磁场的影响、Cr掺杂导致的反常电阻和磁电阻行为，以及Cr掺杂对La0.67Ca0.33MnO3极化子输运的影响。有新的发现：实验结果显示了特殊的双峰CMR行为，而且CMR效应的温区被极大地拓宽，从低温区直至室温以上，说明Mn位的Cr掺杂是调节CMR效应的有效方法。
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| 关 键 词： | La0.67Ca0.33MnO3 物性 Cr掺杂 反常电阻 磁电阻 双峰CMR行为 宽温区CMR效应 晶体结构 磁性材料 |
| 文章编号： | 1001-2443(2003)01-0022-04 |
| 修稿时间： | 2002-08-28 |
The Influence of Cr Doping on Physicd Characters of La0.67Ca0.33MnO3 |
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| PENG Zhen sheng ,SUN Yang. The Influence of Cr Doping on Physicd Characters of La0.67Ca0.33MnO3[J]. Journal of Anhui Normal University(Natural Science Edition), 2003, 26(1): 22-25 |
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| Authors: | PENG Zhen sheng SUN Yang |
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| Affiliation: | PENG Zhen sheng 1,SUN Yang 2 |
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| Abstract: | In this anticle we have studied the influence of Cr doping on physical characters of La 0.67 Ca 0.33 MnO 3,The in fluence of Cr doping on Crystal structure, on magnetic field, and on polaron transition of La 0.67 Ca 0.33 MnO 3,and the abnormal resistance and magnetic resistance action carsed by Crdoping have been researched There are new discoveries: the experimental results show special double-peak CMR action;moreouer, the temperature range of CMR effect has been extremely expanded, it is between the low temperature range and above the room temperature. So we can conclude that Cr doping at mu site is an effective way of adjusting CMR effect. |
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| Keywords: | Cr doping abnormal resistonce magnetic resistance double peak CMR action wide temperatwre range CMR effect |
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