Experimental observation of charge ordering in nanocrystallinePr0.65Ca0.35MnO3
Experimental observation of charge ordering in nanocrystallinePr0.65Ca0.35MnO3
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DOI：
10.1103/physrevb.74.172405
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发表时间：
2006-05
影响因子：
3.7
通讯作者：
A. Biswas;I. Das
中科院分区：
文献类型：
--
作者：
A. Biswas;I. Das
在各种稀土锰氧化物的单晶和大块多晶系统中观察到的电荷有序性是有据可查的。然而，当晶粒尺寸减小到纳米级时，几乎没有任何相同的表现。在平均粒径为40 nm的纳米晶Pr${0.65}$Ca${0.35}$MnO${3}$中观察到了电荷有序。这种现象归因于材料中电荷有序转变的马氏体特征所起的主要作用。
Observation of charge ordering in single crystalline and bulk polycrystalline systems of various rare-earth based manganites is well documented. However, there is hardly any manifestation of the same when the grain size is reduced to nanoscale. We have observed charge ordering in case of nanocrystalline Pr$_{0.65}$Ca$_{0.35}$MnO$_{3}$ of average particle size 40 nm. This phenomenon is attributed to the primary role played by the martensitic character of the charge order transition in the material.