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Title: Spin-phonon coupling in Gd(Co{sub 1/2}Mn{sub 1/2})O{sub 3} perovskite

We have investigated the temperature-dependent Raman-active phonons and the magnetic properties of Gd(Co{sub 1/2}Mn{sub 1/2})O{sub 3} perovskite ceramics in the temperature range from 40 K to 300 K. The samples crystallized in an orthorhombic distorted simple perovskite, whose symmetry belongs to the Pnma space group. The data reveal spin-phonon coupling near the ferromagnetic transition occurring at around 120 K. The correlation of the Raman and magnetization data suggests that the structural order influences the magnitude of the spin-phonon coupling.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [3] ;  [4] ;  [5] ;  [6] ;  [5] ;  [7] ; ;  [8] ;
  1. Curso Ciências Naturais, Universidade Federal do Maranhão, Campus VII, 65400-000 Codó-MA (Brazil)
  2. (Brazil)
  3. Institute of Physics ASCR, v.v.i., Cukrovarnická 10, 162 53 Praha 6 (Czech Republic)
  4. (Czech Republic)
  5. (United States)
  6. Departamento de Física, Universidade Federal do Maranhão, Campus do Bacanga, 65085-580 São Luis-MA (Brazil)
  7. Department of Chemistry, University of North Florida, 1 UNF Drive, Jacksonville, Florida 32224 (United States)
  8. Departamento de Física, Universidade Federal do Ceará, Campus do Pici, P.O. Box 6030, 60455-970 Fortaleza-CE (Brazil)
Publication Date:
OSTI Identifier:
22258781
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 114; Journal Issue: 19; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CERAMICS; COUPLING; MAGNETIC PROPERTIES; MAGNETIZATION; ORTHORHOMBIC LATTICES; OZONE; PEROVSKITE; PHONONS; SPACE GROUPS; SPIN; TEMPERATURE DEPENDENCE