The effects of doping ferromagnetic spinel CdCr{sub 2}Se{sub 4} with Sb{sup 3+} ions

Journal Article · Sun Nov 15 00:00:00 EST 2009 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2009.09.002· OSTI ID:21372400

Malicka, E ^[1]; Waskowska, A ^[2]; Skrzypek, D ^[3]; Sitko, R ^[1]; Kaczorowski, D ^[2]

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1. Department of Chemistry, University of Silesia, Szkolna 9, 40-007 Katowice (Poland)
2. Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 WrocLaw (Poland)
3. A. CheLkowski Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice (Poland)

Semiconducting spinel CdCr{sub 2}Se{sub 4} orders ferromagnetically below T{sub C}=130 K. A series of single-crystals of CdCr{sub 2}Se{sub 4} doped with Sb{sup 3+} ions has been synthesized in order to study an effect of the substitution on the cation distribution and the magnetic properties. The compounds of Cd{sub y}Sb{sub x}Cr{sub z}Se{sub 4} have been investigated by means of X-ray diffraction, magnetization measurements and electron spin resonance spectroscopy. Two selected samples of the composition (Cd{sub 1-x}Sb{sub x})[Cr{sub 2}]Se{sub 4} with x=0.13 and 0.44 retained cubic symmetry with space group Fd3-barm. The unit cell parameter appeared to be sensitive to the concentration of Sb{sup 3+} admixture: it increases with x, despite a close similarity in the ionic radii of Cd{sup 2+} and Sb{sup 3+} in tetrahedral coordination. Upon partial substitution of Cd{sup 2+} by Sb{sup 3} no obvious change in the Curie temperature was observed, however, the effective magnetic moment slightly increased, what may result from the appearance of Cr{sup 2+} ions. The characteristic feature of the system studied is an extended range of short-range magnetic order, in which the magnetic properties in the paramagnetic state are governed by the formation of ferromagnetic clusters, as indicated by both the bulk magnetometric and spectroscopic data. - Graphical abstract: Temperature dependent evolution of the ESR spectrum for the (Cd{sub 0.56}Sb{sub 0.44})[Cr{sub 2}]Se{sub 4} single-crystal showing inhomogeneous nature of the ferromagnetic ordered state below T{sub c}=130 K. At temperature 127 K a fraction of the paramagnetic phase can still be observed.

• OSTI ID: 21372400
• Journal Information: Journal of Solid State Chemistry, Vol. 182, Issue 11; Other Information: DOI: 10.1016/j.jssc.2009.09.002; PII: S0022-4596(09)00422-8; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANTIMONY IONS
CADMIUM COMPOUNDS
CADMIUM IONS
CATIONS
CHROMIUM COMPOUNDS
CHROMIUM IONS
CURIE POINT
DISTRIBUTION
DOPED MATERIALS
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
MAGNETIZATION
MONOCRYSTALS
SELENIDES
SPACE GROUPS
SPECTRA
SPINELS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0065-0273 K
X-RAY DIFFRACTION
CHALCOGENIDES
CHARGED PARTICLES
COHERENT SCATTERING
CRYSTALS
DIFFRACTION
IONS
MATERIALS
MINERALS
OXIDE MINERALS
PHYSICAL PROPERTIES
SCATTERING
SELENIUM COMPOUNDS
SYMMETRY GROUPS
TEMPERATURE RANGE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE