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

Journal Article · Thu Nov 21 00:00:00 EST 2013 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4829902· OSTI ID:22258781

Silva, R. X. ^[1]; Reichlova, H. ^[2]; Marti, X. ^[2]; Barbosa, D. A. B. ^[3]; Lufaso, M. W. ^[4]; Araujo, B. S.; Ayala, A. P. ^[5]; others, and

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1. Curso Ciências Naturais, Universidade Federal do Maranhão, Campus VII, 65400-000 Codó-MA (Brazil)
2. Institute of Physics ASCR, v.v.i., Cukrovarnická 10, 162 53 Praha 6 (Czech Republic)
3. Departamento de Física, Universidade Federal do Maranhão, Campus do Bacanga, 65085-580 São Luis-MA (Brazil)
4. Department of Chemistry, University of North Florida, 1 UNF Drive, Jacksonville, Florida 32224 (United States)
5. Departamento de Física, Universidade Federal do Ceará, Campus do Pici, P.O. Box 6030, 60455-970 Fortaleza-CE (Brazil)

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.

• OSTI ID: 22258781
• Journal Information: Journal of Applied Physics, Vol. 114, Issue 19; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERAMICS
COUPLING
MAGNETIC PROPERTIES
MAGNETIZATION
ORTHORHOMBIC LATTICES
OZONE
PEROVSKITE
PHONONS
SPACE GROUPS
SPIN
TEMPERATURE DEPENDENCE