Singh, Satendra Pal ; Pandey, Dhananjai ; Yoon, Songhak ; Baik, Sunggi ; Shin, Namsoo (2007) Evidence for monoclinic crystal structure and negative thermal expansion below magnetic transition temperature in Pb(Fe1/2Nb1/2)O3 Applied Physics Letters, 90 (24). 242915_1-242915_3. ISSN 0003-6951
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Official URL: http://apl.aip.org/resource/1/applab/v90/i24/p2429...
Related URL: http://dx.doi.org/10.1063/1.2748856
Abstract
The existing controversy about the room temperature structure of multiferroic Pb(Fe1/2Nb1/2)O3 is settled using synchrotron powder x-ray diffraction data. Results of Rietveld refinements in the temperature range of 300-12 K reveal that the structure remains monoclinic in the Cm space group down to 12 K, but the lattice parameters show anomalies at the magnetic transition temperature (TN) due to spin-lattice coupling. The lattice volume exhibits negative thermal expansion behavior, with a=-4.64×10-6K-1, below TN.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Institute of Physics. |
| ID Code: | 27250 |
| Deposited On: | 10 Dec 2010 12:53 |
| Last Modified: | 05 Mar 2011 09:32 |
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