Evidence for monoclinic crystal structure and negative thermal expansion below magnetic transition temperature in Pb(Fe1/2Nb1/2)O-3
SCIE
SCOPUS
- Title
- Evidence for monoclinic crystal structure and negative thermal expansion below magnetic transition temperature in Pb(Fe1/2Nb1/2)O-3
- Authors
- Singh, SP; P; ey, D; Yoon, S; Baik, S; Shin, N
- Date Issued
- 2007-06-11
- Publisher
- AMER INST PHYSICS
- Abstract
- The existing controversy about the room temperature structure of multiferroic Pb(Fe1/2Nb1/2)O-3 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 (T-N) due to spin-lattice coupling. The lattice volume exhibits negative thermal expansion behavior, with alpha=-4.64x10(-6)K(-1), below T-N. (c) 2007 American Institute of Physics.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/9592
- DOI
- 10.1063/1.2748856
- ISSN
- 0003-6951
- Article Type
- Article
- Citation
- APPLIED PHYSICS LETTERS, vol. 90, no. 24, 2007-06-11
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