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| 不同磁场下退火的纳米BiFeO3颗粒的拉曼散射研究 | |
| 引用本文： | 张丽艳,杨洋,马树元,朱恪,罗万居,刘玉龙.不同磁场下退火的纳米BiFeO3颗粒的拉曼散射研究[J].光散射学报,2009,21(4):300-303. |
| 作者姓名： | 张丽艳 杨洋 马树元 朱恪 罗万居 刘玉龙 |
| 作者单位： | 1. 中科院物理研究所,北京,100190 2. 广西大学物理科学与工程技术学院,南宁,530004 3. 中科院电工研究所,北京,100190 |
| 摘 要： | 对不同外磁场强度(B = 0T, 5T和10T)下退火的纳米BiFeO3颗粒进行了室温和液氮温度下的拉曼光谱研究。实验发现, 与0T磁场下退火样品的Raman光谱相比, 同一温度下, 纳米BiFeO3颗粒中的Raman振动模式峰的线宽随着磁场的增加而减小, 表明在外磁场的作用下, 纳米BiFeO3颗粒内部的缺陷在减少,晶格完整性得到改善。经外磁场处理的纳米BiFeO3颗粒位于139 cm-1处的A-1模式峰明显向紫端移动, 说明磁有序的程度可以影响到声子-自旋耦合。5T和10T磁场下退火的样品相比, 该峰峰位没有明显改变, 说明影响样品中磁有序排列的磁场存在一个临界值。三块样品的低温拉曼光谱证实了磁场的作用确实影响样品内磁有序的排列。 |
| 关 键 词： | BiFeO3 纳米颗粒 退火 外加磁场 拉曼光谱 临界值 |
| 收稿时间： | 2009/5/30 |
Raman Scattering Study on BiFeO_3 Nanopariticles Annealed by Different Extra Magnetic Fields |
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| ZHANG Li-yan,YANG Yang,MA Shu-yuan,ZHU Ke,LUO Wan-ju,LIU Yu-long.Raman Scattering Study on BiFeO_3 Nanopariticles Annealed by Different Extra Magnetic Fields[J].Chinese Journal of Light Scattering,2009,21(4):300-303. | |
| Authors: | ZHANG Li-yan YANG Yang MA Shu-yuan ZHU Ke LUO Wan-ju LIU Yu-long |
| Institution: | ZHANG Li-yan1,YANG Yang1,MA Shu-yuan2,ZHU Ke1,LUO Wan-ju3,LIU Yu-long1*(1.Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China,2.College of Physics Science and Technology,Guangxi University,Nanning 530004,3.Institute of Electrical Engineering,China) |
| Abstract: | Raman scattering study of BiFeO3 nanopariticles annealed by different magnetic field was carried out at room temperature and 77K.It is found that,comparing with Raman spectra of sample annealed directly,line widths of Raman vibration mode peaks decrease with extra magnetic field intensity increasing,indicating that inner detects reduce and lattice integrality improve in BiFeO3 nanopariticles affected by extra magnetic field.A-1 mode peak around 139 cm-1 in BiFeO3 nanopariticles annealed by extra magnetic fi... |
| Keywords: | BiFeO_3 BiFe03 nanoparticles anneal extra magnetic field Raman spectra critical value |
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