Saraf, L. V. ; Ogale, S. B. ; Chen, Z. ; Godfrey, R. P. ; Venkatesan, T. ; Ramesh, R. (2000) Correlation of large dielectric response with the ordering transitions in Pr0.67Ca0.33MnO3 Physical Review B, 62 (18). R11961-R11964. ISSN 0163-1829
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Official URL: http://prb.aps.org/abstract/PRB/v62/i18/pR11961_1
Related URL: http://dx.doi.org/10.1103/PhysRevB.62.R11961
Abstract
Frequency-dependent capacitance measurements and transport measurements tuned to reveal system impedance have been performed on epitaxial thin films of Pr0.67Ca0.33MnO3. These reflect strong dielectric response features correlated to the various ordering transition temperatures in the system, namely, ~220 K (charge ordering), ~130 K (antiferromagnetic ordering), and ~117 K (spin canting). An equally strong feature is also seen at ~125 K, which does not correspond to any reported transition. The enhanced dielectric response at the transitions is attributed to the nonequilibrium transport and slow carrier reorganization dynamics defined by polaronic hopping and magnetic frustration.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Physical Society. |
| ID Code: | 26869 |
| Deposited On: | 08 Dec 2010 13:03 |
| Last Modified: | 11 Jun 2011 11:23 |
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