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Author Behera, P. Suchismita ♦ Bhobe, P. A. ♦ Sathe, V. G. ♦ Nigam, A. K.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ ABSORPTION SPECTROSCOPY ♦ CADMIUM SELENIDES ♦ CHROMIUM SELENIDES ♦ COUPLING ♦ CRYSTAL STRUCTURE ♦ CRYSTALS ♦ EXCHANGE INTERACTIONS ♦ FINE STRUCTURE ♦ MAGNETIC PROPERTIES ♦ PHASE TRANSFORMATIONS ♦ PHONONS ♦ RAMAN SPECTROSCOPY ♦ SPIN ♦ SYMMETRY ♦ TEMPERATURE RANGE 0065-0273 K ♦ TEMPERATURE RANGE 0273-0400 K ♦ X-RAY SPECTROSCOPY
Abstract Interplay between structural disorder and magnetic interaction is investigated here for a multiferroic candidate material, CdCr{sub 2}Se{sub 4}. Ferromagnetic order in CdCr{sub 2}Se{sub 4} sets in below T{sub C} ∼ 130 K as a result of competition between the direct Cr-Cr spin coupling and the near neighbour Cr-Se-Cr exchange interactions. Hence, a small change in the crystal structure is expected to drastically affect its magnetic order. In this report, local lattice distortions within the overall cubic symmetry were brought about by replacing a small percentage of Se by isovalent S. Detailed crystal structure study using EXAFS and Raman Spectroscopy reflects the presence of local distortions within the overall cubic symmetry. Contrary to the expectation, magnetic properties of the substituted compositions do not show any drastic changes. Though, a signature of spin-phonon coupling is present across the magnetic ordering temperature. No structural phase transition occurs within the investigated temperature range of 80–300 K.
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-07-28
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 120
Issue Number 4


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