Vogt, T. ; Cheetham, A. K. ; Mahendiran, R. ; Raychaudhuri, A. K. ; Mahesh, R. ; Rao, C. N. R. (1996) Structural changes and related effects due to charge ordering in Nd0.5Ca0.5MnO3 Physical Review B: Condensed Matter and Materials Physics, 54 (21). pp. 15303-15306. ISSN 1098-0121
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Official URL: http://prb.aps.org/abstract/PRB/v54/i21/p15303_1
Related URL: http://dx.doi.org/10.1103/PhysRevB.54.15303
Abstract
Charge ordering in L1−xAxMnO3 (L=rare earth , A=Ca, Sr)) depends strongly on the width of the eg band or on the average radius of the A-site cations, <rA>. Investigations of Nd0.5Ca0.5MnO3 with a small <rA> show evidence for a first-order transition due to charge ordering around 220 K, accompanied by a large decrease in volume (0.45%). Structural data at different temperatures indicate that the distortions within the structure are a direct result of charge ordering. Valence sum calculations show the presence of two differently charged Mn atoms. Electron transport and magnetic susceptibility measurements have been carried out down to low temperatures to understand the nature of the charge-ordered state. The charge-ordered state melts on the application of a magnetic field.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 39937 |
| Deposited On: | 20 May 2011 07:53 |
| Last Modified: | 05 Jul 2012 04:00 |
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