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Pressure-induced structural change in orthorhombic perovskite GdMnO(3).
MedLine Citation:
PMID:  22353622     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Structural stability of the perovskite-type GdMnO(3) has been investigated by the synchrotron angle-dispersive x-ray diffraction technique up to 63 GPa in a diamond anvil cell. GdMnO(3) stays in an orthorhombic structure but undergoes an isostructural phase transition with ∼5% volume reduction at 50 GPa. In the parent orthorhombic phase, the compressions along a, b and c axes exhibit a large anisotropic behavior. With increasing pressure, our results show that the distortion and tilts of the MnO(6) octahedra are reduced continuously and the orthorhombic structure evolves towards higher symmetry. By fitting the observed pressure-volume data using the third-order Birch-Murnaghan equation of state, we obtain the bulk modulus B(0) = 156(3) GPa with B(0)' = 6.5(3) for the starting orthorhombic phase. Upon decompression, the starting orthorhombic phase is recovered.
Authors:
Chuanlong Lin; Yufeng Zhang; Jing Liu; Xiaodong Li; Yanchun Li; Linyun Tang; Lun Xiong
Publication Detail:
Type:  Journal Article     Date:  2012-02-21
Journal Detail:
Title:  Journal of physics. Condensed matter : an Institute of Physics journal     Volume:  24     ISSN:  1361-648X     ISO Abbreviation:  J Phys Condens Matter     Publication Date:  2012 Mar 
Date Detail:
Created Date:  2012-03-02     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101165248     Medline TA:  J Phys Condens Matter     Country:  England    
Other Details:
Languages:  eng     Pagination:  115402     Citation Subset:  IM    
Affiliation:
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
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