| Pr1/3Sr2/3FeO3中电荷有序现象的超声研究 |
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| 引用本文： | 孔辉,刘毅,江亮,苏金瑞,朱长飞.Pr1/3Sr2/3FeO3中电荷有序现象的超声研究[J].低温物理学报,2007,29(1):27-29. |
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| 作者姓名： | 孔辉 刘毅 江亮 苏金瑞 朱长飞 |
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| 作者单位： | 1. 中国科学技术大学材料科学与工程系先进功能材料与器件实验室,合肥,230026
2. 中国科学技术大学材料科学与工程系先进功能材料与器件实验室,合肥,230026;贵州大学理学院,贵阳,550003 |
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| 基金项目： | 国家自然科学基金，高等学校博士学科点专项科研项目 |
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| 摘 要： | 系统研究了Pr1/3Sr2/3FeO3单相多晶样品在低温下的电荷输运性质和超声特性.电阻测量表明,Pr1/3Sr2/3FeO3在162K发生了电荷有序相变.而超声声速从室温开始就出现了明显的软化,在电荷有序温度附近达到最小值,随后又急剧硬化,同时伴随着一个巨大的衰减峰.分析指出这是由于电-声子相互作用导致的结果,该电-声子耦合可能起源于Fe4 的Jahn-Teller效应.
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| 关 键 词： | 电荷有序 超声声速与衰减 |
| 修稿时间： | 11 14 2005 12:00AM |
ULTRASONIC STUDY ON CHARGE ORDERING IN Pr1/3Sr2/3FeO3 |
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| Kong Hui,Liu Yi,Jiang Liang,Su Jin-rui,Zhu Chang-fei.ULTRASONIC STUDY ON CHARGE ORDERING IN Pr1/3Sr2/3FeO3[J].Chinese Journal of Low Temperature Physics,2007,29(1):27-29. |
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| Authors: | Kong Hui Liu Yi Jiang Liang Su Jin-rui Zhu Chang-fei |
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| Institution: | 1.Lab of Advanced functional materials and devices, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026 ; 2School of Science , Cuizhou University, Cuiyang , Cuizhou 550003 |
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| Abstract: | The longitudinal ultrasonic sound velocity,attenuation and resistivity of single phase polycrystalline Pr1/3Sr2/3FeO3 sample were systematically measured in the low temperature. It undergoes charge ordering (CO) transition at about 162K from the resistivity measurement. The longitudinal ultrasonic sound velocity dramatically softens below the room temperature and stiffens near the TCO, accompanied with an attenuation peak. It implies extremely strong electron-phonon interaction, which may originate from the Jahn-Teller effect of Fe4 . |
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| Keywords: | Pr1/3Sr2/3FeO3 |
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