| 双层稀土锰氧化物La2-2xSr1+2xMn2O7的ESR研究 |
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| 引用本文： | 樊宝元,郑丽萍,赵建军.双层稀土锰氧化物La2-2xSr1+2xMn2O7的ESR研究[J].阴山学刊,2011,25(1). |
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| 作者姓名： | 樊宝元 郑丽萍 赵建军 |
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| 作者单位： | 包头师范学院,物理科学与技术学院,内蒙古,包头,014030 |
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| 基金项目： | 内蒙自然科学基金资助项目 |
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| 摘 要： | 电子自旋共振(简称ESR)是一种研究磁性关联的很有效的的实验手段.通过测量样品的变温ESR谱线,分析谱线参数随温度的变化关系,能够获得很多关于静态和动态磁耦合的信息.本文采用光学浮区炉制备锰氧化物La2-2x Sr+2x Mn2 O7(x=0.38)单晶样品,利用电子自旋共振研究层状锰氧化物单晶的MnO2双层问(interlayer)的耦合能.谱线中出现了代表层间反铁磁关联的高场光学模和低场声学模.通过分析声学模与光学模的共振场与积分强度随温度的变化,发现这些层间的反铁磁随着温度的变化逐渐发展,这表明利用铁磁共振方法能够研究层状锰氧化物La2-2x Sr+2x Mn2 O7的层间耦合,研究结果为这个体系内磁性关联的研究提供了一种新的方法.
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| 关 键 词： | 磁性关联 电子自旋共振 层状锰氧化物 层间耦合 |
Electron Spin Resonance (ESR) of Bilayered Manganite La2-2xSr1+2xMn2O7 |
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| FAN Bao-yuan,ZHENG Li-ping,ZHAO Jian-jun.Electron Spin Resonance (ESR) of Bilayered Manganite La2-2xSr1+2xMn2O7[J].Yin Shan Academic Journal,2011,25(1). |
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| Authors: | FAN Bao-yuan ZHENG Li-ping ZHAO Jian-jun |
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| Institution: | FAN Bao-yuan,ZHENG Li-ping,ZHAO Jian-jun (Department of Physics,Baotou teachers College,Baotou 014030) |
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| Abstract: | Electron spin resonance(ESR) has proved to be a powerful tool in the study of both static and dynamic magnetic correlation in manganites.Valuable information can be obtained regarding the interplay of different interactions in the system through a study of the temperature dependence of various ESR parameters.In this thesis,single crystals of La2-2xSr1+2xMn2O7(x=0.38) were melt-grown in flowing air in a floating-zone optical image furnace,the interlayer coupling of bilayered manganite single crystal has been... |
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| Keywords: | magnetic properties correlation electron spin resonance bilayered manganite interlayer coupling |
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