| Cr3+或V3+替代Mn3+对La0.4Ca0.6MnO3电荷有序相的影响 |
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| 引用本文： | 彭振生,宋启祥,杨刚,王桂英,唐永刚,毛强.Cr3+或V3+替代Mn3+对La0.4Ca0.6MnO3电荷有序相的影响[J].稀有金属,2012(1):74-79. |
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| 作者姓名： | 彭振生 宋启祥 杨刚 王桂英 唐永刚 毛强 |
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| 作者单位： | 1. 自旋电子与纳米材料安徽省重点实验室(培育基地),安徽宿州234000;中国科学技术大学合肥微尺度物质科学国家实验室,安徽合肥230026
2. 自旋电子与纳米材料安徽省重点实验室(培育基地),安徽宿州234000;宿州学院电子与电气工程系,安徽宿州234000 |
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| 基金项目： | 国家自然科学基金，安徽省教育厅自然科学研究项目，安徽省教育厅自然科学研究项目 |
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| 摘 要： | 用固相反应法制备了La0.4 Ca0.6 Mn1 -xCrxO3(LCMCO)和La0.4Ca0.6Mn1-yVyO3 (LCMVO)(x,y=0.00,006,0.08)多晶样品.通过XRD、M-T曲线、ESR谱线,研究了Cr3+或V3+替代Mn3+对La0.4Ca0.6MnO3电荷有序相的影响.实验结果表明:电荷有序相随着Cr掺杂浓度的增加而被破坏,在LCMCO体系中电荷有序相几乎完全消失；而当V掺杂时,虽然电荷有序相随着V成分的增加会逐渐变弱,但电荷有序相依然存在于LCMVO体系中.用V3+替代Mn3+只是对于长程的电荷有序仅仅起了隔断的作用；用Cr3+替代Mn3+破坏了CE型反铁磁的自旋序从而引起电荷序的融化.从实验上证明了电荷序CE型反铁磁体系中,电荷序和自旋序存在强耦合相互作用.
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| 关 键 词： | 钙钛矿锰氧化物 电荷有序 V掺杂 Cr掺杂 |
Influence of Low Cr3+ or V3+ Substitute Mn3+ on Charge Ordering Phase in La0.4Ca0.6MnO3 |
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| Peng Zhensheng
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Song Qixiang
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Yang Gang
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Wang Guiying
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Tang Yonggang
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Mao Qiang.Influence of Low Cr3+ or V3+ Substitute Mn3+ on Charge Ordering Phase in La0.4Ca0.6MnO3[J].Chinese Journal of Rare Metals,2012(1):74-79. |
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| Authors: | Peng Zhensheng Song Qixiang Yang Gang Wang Guiying Tang Yonggang Mao Qiang |
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| Affiliation: | 1,2,(1.Cultivating Base of Anhui Key Laboratory of Spintronic and Nanometric Materials,Suzhou 234000,China;2.Department of Electronics and Electric Engineering,Suzhou University,Suzhou 234000,China;3.Hefei National Laboratory of Micro-Scale Matter Science,University of Science and Technology of China,Hefei 230026,China) |
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| Abstract: | Polycrystalline samples of La0.4Ca0.6Mn1-yCryO3(LCMCO) and La0.4Ca0.6Mn1-xVxO3(LCMVO)(x,y=0.00,0.06,0.08) were prepared by the solid state reaction method.The influence of Cr3+ or V3+ substitution for Mn3+ on the magnetic property and charge ordering phase of La0.4Ca0.6MnO3 were studied through the measurements of X-ray diffraction(XRD),magnetization-temperature(M-T) curves and ESR spectra.With the increase of the amount of Cr,the charge ordering phase of La0.4Ca0.6MnO3 was destroyed,and the charge ordering phase in the LCMCO system disappeared almost.On the other hand,when the V was doped,the charge ordering phase was gradually weakened with the increase of V.However,the charge ordering phase still existed in the LCMVO system.That was because that the V3+ substitution for Mn3+ only played a role in the partition of the long-range charge ordering.In addition,the Cr3+ substitution for Mn3+ destroyed the spin order of CE-type antiferromagnetism,which led to the melting of charge ordering.The results confirmed that a strong coupling interaction between charge order and spin order existed in the charge order CE-type antiferromagnetic system. |
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| Keywords: | perovskite manganite charge ordering V doping Cr doping |
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