节点文献
La0.33Ca0.67Mno3钙钛矿中的电荷有序
tranCharge-Ordering in La0.33Ca0.67MnO3 Perovskite
【摘要】 La0.33Ca0.67MnO3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La0.33Ca0.67MnO3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.
【Abstract】 Structure model of charge-ordered La0.33Ca0.67MnO3 perovskite is one of current focusedstudy in condensed matter physics. There are great discrepancies in previous studies in this field. Ourtransmission electron microscopy study confirms Wigner crystal model with transverse displacement and isnot consisent with the bi-stripe model with longitudinal displacement. We observed incommensurate modulation and anti-phase domains with a displacement vector aco/3 in charge-ordered La0.33Ca0.67MnO3 perovskite.
【关键词】 电荷有序;
钙钛矿结构;
La0.33Ca0.67MnO3;
电子显微学;
畴结构;
过渡金属氧化物;
特大磁阻性;
【Key words】 charge-ordering; perovskite structure; La0.33Ca(0. 67 MnO3; electron microscopy; domain structuresition metal oxides; colossal magnetoresistance;
【Key words】 charge-ordering; perovskite structure; La0.33Ca(0. 67 MnO3; electron microscopy; domain structuresition metal oxides; colossal magnetoresistance;
【基金】 国家自然科学基金!(19974031)
- 【文献出处】 武汉大学学报(自然科学版) ,WUHAN UNIVERSITY JOURNAL(NATURAL SCIENCE EDITION) , 编辑部邮箱 ,2000年01期
- 【分类号】O469
- 【下载频次】70