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La_(0.33)Ca_(0.67)Mno_3钙钛矿中的电荷有序
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作者 王仁卉 桂嘉年 朱溢眉 《武汉大学学报(自然科学版)》 CSCD 2000年第1期79-83,共5页
La_(0.33)Ca_(0.67)MnO_3钙钛矿中电荷有序的结构模型是当前凝聚态物理学研究热点之一,前人的工作在这方面有很大的分歧.本文用透射电子显微术证实了横向位移的Wigner晶体模型,否定了纵向位移的双条带(... La_(0.33)Ca_(0.67)MnO_3钙钛矿中电荷有序的结构模型是当前凝聚态物理学研究热点之一,前人的工作在这方面有很大的分歧.本文用透射电子显微术证实了横向位移的Wigner晶体模型,否定了纵向位移的双条带(bi-stripe)模型.在电荷有序的La_(0.33)Ca_(0.67)MnO_3中发现了非公度调制和在电荷有序过程中生成的位移矢量为aco/3的反相畴. 展开更多
关键词 电荷有序 钙钛矿结构 电子显微学 畴结构
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Charge-Ordering in La_(0.33) Ca_(0.67) MnO_3 Perovskite
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作者 WANG Ren-hui GUI Jia-nian +1 位作者 Zhu Yi-mei ( Department of Physics, Wuhan University, Wuhan 430072, China Brookhaven National Laboratory, Upton, NY 11973, USA) 《Wuhan University Journal of Natural Sciences》 CAS 2000年第1期79-79,共1页
Structure model of charge-ordered La_0.33 Ca_0.67 MnO_3, perovskite is one of current focused study in condensed matter physics. There are great discrepancies in previous studies in this field. Our transmission electr... Structure model of charge-ordered La_0.33 Ca_0.67 MnO_3, perovskite is one of current focused study in condensed matter physics. There are great discrepancies in previous studies in this field. Our transmission electron microscopy study confirms Wigner crystal model with transverse displacement and is not consisent with the hi-stripe model with longitudinal displacement. We observed incommensurate modulation and anti-phase domains with a displacement vector a_co/3 in charge--ordered La_0.33 Ca_0.67 MnO_3, perovskite. 展开更多
关键词 CHARGE-ORDERING perovskite structure La_(0.33) ca_(0.67) MnO_3 electron microscopy domain structure transition metal oxides colossal magnetoresistance
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