Rao, S. S. ; Tripathi, S. ; Pandey, D. ; Bhat, S. V. (2006) Suppression of charge order, disappearance of antiferromagnetism, and emergence of ferromagnetism in Nd0.5Ca0.5MnO3 nanoparticles Physical Review B: Condensed Matter, 74 (14). 144416_1-144420_5. ISSN 0163-1829
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Official URL: http://prb.aps.org/abstract/PRB/v74/i14/e144416
Related URL: http://dx.doi.org/10.1103/PhysRevB.74.144416
Abstract
Nd0.5Ca0.5MnO3 nanoparticles (average diameter ~20 and 40 nm) are synthesized by the polymeric precursor sol-gel method and characterized by various physico-chemical techniques. Quite strikingly, in the 20 nm particles, the charge-ordered (CO) and the antiferromagnetic phases observed in the bulk below 250 K and 160 K, respectively, are completely absent. Instead, a ferromagnetic (FM) transition is observed at 95 K followed by an insulator-to-metal transition at 75 K. The 40 nm particles show a residual CO phase but a transition to the FM state also occurs, at a slightly higher temperature of 110 K.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 88728 |
| Deposited On: | 29 Mar 2012 14:44 |
| Last Modified: | 13 Jul 2012 12:01 |
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