Bindu, R. ; Maiti, Kalobaran ; Khalid, S. ; Sampathkumaran, E. V. (2009) Structural link to precursor effects Physical Review B: Condensed Matter and Materials Physics, 79 (9). 094103_1-094103_6. ISSN 1098-0121
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Official URL: http://prb.aps.org/abstract/PRB/v79/i9/e094103
Related URL: http://dx.doi.org/10.1103/PhysRevB.79.094103
Abstract
We investigate the origin of precursor effect associated to magnetic phase transitions in a quasi-one-dimensional system Ca3Co2O6, employing extended X-ray absorption fine structure technique. Experimental results reveal unusual changes in the Co-O bond lengths in CoO6 units nucleating at a temperature T∗, where the precursor effect occurs. The corresponding Debye-Waller factors representing disorder effect exhibit anomalous evolution across T∗. These results reveal a unique link between the local structural changes and the precursor effect that needs to be considered in the understanding of various phase transitions.
Item Type: | Article |
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Source: | Copyright of this article belongs to The American Physical Society. |
ID Code: | 45743 |
Deposited On: | 29 Jun 2011 03:33 |
Last Modified: | 17 Jul 2012 16:14 |
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