| Fe3O4的高压电学性质 |
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| 引用本文： | 杨洁,苏宁宁,彭刚.Fe3O4的高压电学性质[J].吉林大学学报(理学版),2013,51(1):124-127. |
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| 作者姓名： | 杨洁 苏宁宁 彭刚 |
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| 作者单位： | 1. 空军航空大学 ,基础部, ,长春130022;2. 吉林大学 超硬材料国家重点实验室, 长春 130012 |
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| 基金项目： | 国家自然科学基金(批准号:10574055;50802033);国家重点基础研究发展计划973项目基金(批准号:2010CB808204);吉林省自然科学基金(批准号:201201106) |
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| 摘 要： | 基于金刚石对顶砧（DAC）上的原位电阻率测量技术, 测量Fe3O4粉末在高压下的电阻率及磁阻率, 得到了样品电阻率随压力的变化关系. 当压力大于或小于6 GPa时, 电阻率随压力的增加均呈下降趋势, 但减小的速率不同; 当压力小于6 GPa时, 样品呈正的磁阻效应; JP2]当压力大于6 GPa时, 样品呈负的磁阻效应. 结果表明Fe3O4的微观结构在6 GPa发生变化.
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| 关 键 词： | 高压 Fe3O4 磁电阻率 |
| 收稿时间： | 2012-05-16 |
Electrical Property of Fe3O4 at a High Pressure |
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| YANG Jie,SU Ning-ning,PENG Gang.Electrical Property of Fe3O4 at a High Pressure[J].Journal of Jilin University: Sci Ed,2013,51(1):124-127. |
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| Authors: | YANG Jie SU Ning-ning PENG Gang |
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| Institution: | 1. Department of Foundation, Aviation University of Air Force, Changchun 130022, China;
2. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China |
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| Abstract: | The resistivity and magnetoresistance of Fe3O4 were investigated at a high pressure by means of in\|situ electrical resistivity measurement with diamond anvil cell. We obtained the relationship of resistivity as a function of pressure. When p＞6 GPa or p＜6 GPa, the resistivity of Fe3O4 decreases with increasing pressure. Its dropdown speed at pressure p＜6 GPa is faster than that at pressure higher than 6 GPa. When p＜6 GPa, the sample shows a normal magnetic resistance effect. When p＞6 GPa, the sample shows a negative magnetic resistance effect. This phenomenon indicates that an electronic phase related to electron spin happens at 6 GPa. |
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| Keywords: | high pressure Fe3O4 magnetic resistance |
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