| La_(0.3)Ca_(0.7)Mn_(1-x)V_xO_3体系的有序相研究 |
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| 引用本文： | 郭焕银,刘宁,彭振生,蔡之让,皮雳.La_(0.3)Ca_(0.7)Mn_(1-x)V_xO_3体系的有序相研究[J].宿州学院学报,2010,25(11). |
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| 作者姓名： | 郭焕银 刘宁 彭振生 蔡之让 皮雳 |
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| 作者单位： | 宿州学院自旋电子和纳米材料安徽省高校重点实验室培育基地 中国科学技术大学结构分析开放实验室 |
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| 基金项目： | 国家自然科学基金重点项目，国家重点基础研究发展规划项目，安徽省高等学校自然科学研究重点项目，安教省教育厅自然科学研究重大项目 |
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| 摘 要： | 通过对La0.3Ca0.7Mn1-xVxO3(x=0.05,0.10,0.134,0.20)体系的磁化强度-温度曲线(M-T)曲线、电阻率-温度曲线(ρ-T)的测量,研究了Mn位掺V对La0.3Ca0.7MnO3体系电荷序和自旋序的影响。结果表明:当0.05≤x≤0.134时,体系存在电荷有序(CO)相,其自旋序随温度降低发生顺磁(PM)-电荷有序(CO)-反铁磁(AFM)变化。当x=0.20时,CO相逐步融化,在40K发生自旋玻璃转变,表现出再入型的自旋玻璃行为,低温下的基态存在着多种复杂的磁相互作用之间的竞争机制。
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| 关 键 词： | 电荷有序 自旋序 再入型自旋玻璃行为 |
Research on Ordering Phase of La0.3 Ca0.7 Mn1-x VxO3 System |
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| GUO Huan-yin,LIU Ning,PENG Zhen-sheng,CAI Zhi-rang,PI Li.Research on Ordering Phase of La0.3 Ca0.7 Mn1-x VxO3 System[J].Journal of Shuzhou College,2010,25(11). |
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| Authors: | GUO Huan-yin LIU Ning PENG Zhen-sheng CAI Zhi-rang PI Li |
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| Institution: | GUO Huan-yin; LIU Ning; PENG Zhen-sheng; CAI Zhi-rang; PI Li(1.Nurture Base of Anhui Colleges and Universities Key Laboratory of Spintronics and Nanomaterials; Suzhou University; Suzhou; Anhui 234000; 2.Structure Research Laboratory; University of Science and Technology; Hefei; Anhui; 230026; China); |
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| Abstract: | The magnetization-temperature(M-T) and resistivity-temperature(ρ-T) curves of the La0.3Ca0.7Mn1-xVxO3(x=0.05,0.10,0.134,0.20)system were measured to research the effect of substituting V in the Mn-site of La0.3Ca0.7MnO3 system on charge order and spin order.The result shows: when 0.05≤x≤0.134,the charge ordering(CO) phase exists in the system,the spin order shows paramagnetism(PM)-charge ordering(CO)-antiferromagnetism(AFM) transition with temperature decreasing.When x=0.20,CO phase melts gradually,the spin... |
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| Keywords: | charge ordering spin order reentrant spin glass behavior appears |
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