The first-order phase transition and colossal magnetoresistance effects in bulk Gd-doped La0.67Sr0.33MnO3
The first-order phase transition and colossal magnetoresistance effects in bulk Gd-doped La0.67Sr0.33MnO3
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DOI：
10.1007/s10853-005-1602-y
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发表时间：
2005-09
影响因子：
4.5
通讯作者：
X. Cui;Xiukun Hu;H. Xia;Jiangying Yu;Dunhui Wang;Shiyuan Zhang
中科院分区：
文献类型：
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作者：
X. Cui;Xiukun Hu;H. Xia;Jiangying Yu;Dunhui Wang;Shiyuan Zhang
类钙钛矿锰氧化物R1− xAxMnO 3（其中R= La、Pr、Y等，A= Ca、Sr、Ba等）受到了相当大的关注。由于它们的巨磁阻（CMR）和其他新颖的性质[1-4]。在这些ABO 3类钙钛矿型锰氧化物中，A位的平均离子半径λ rA λ起着非常重要的作用[5]。这些化合物中Mn-O-Mn键角（偏离180 °）随Mn ~（3+）的变化而变化，从而影响了Mn ~（3+）处的eg传导电子（空穴）与t3
Considerable attention has been paid to perovskite-like manganites R1− xAxMnO3 (where R= La, Pr, Y, etc. and A= Ca, Sr, Ba, etc.) owing to their colossal magnetoresistance (CMR) and other novel properties [1–4]. In these ABO3 perovskite-like mangnites, the average ionic radius of the A site〈 rA〉 plays a very important role [5]. The Mn–O–Mn bond angle (deviation from 180◦) in these compounds changes with the variation of〈 rA〉, which affects the transfer interaction of the eg conduction electrons (holes) at Mn3+ with t3