Geometrical magnetic frustration in rare-earth chalcogenide spinels
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544 (United States)
- Department of Physics and Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16802 (United States)
We have characterized the magnetic and structural properties of the CdLn{sub 2}Se{sub 4} (Ln=Dy,Ho), and CdLn{sub 2}S{sub 4} (Ln=Ho,Er,Tm,Yb), spinels. We observe all compounds to be normal spinels, possessing a geometrically frustrated sublattice of lanthanide atoms with no observable structural disorder. Fits to the high-temperature magnetic susceptibilities indicate these materials to have effective antiferromagnetic interactions, with Curie-Weiss temperatures {theta}{sub W}{approx}-10 K, except CdYb{sub 2}S{sub 4} for which {theta}{sub W}{approx}-40 K. The absence of magnetic long-range order or glassiness above T=1.8 K strongly suggests that these materials are a different venue in which to study the effects of strong geometrical frustration, potentially as rich in interesting physical phenomena as that of the pyrochlore oxides.
- OSTI ID:
- 20719294
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 72, Issue 5; Other Information: DOI: 10.1103/PhysRevB.72.054411; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETIC MATERIALS
ANTIFERROMAGNETISM
CADMIUM COMPOUNDS
CURIE POINT
DYSPROSIUM COMPOUNDS
ERBIUM COMPOUNDS
HOLMIUM COMPOUNDS
MAGNETIC SUSCEPTIBILITY
OXIDES
PYROCHLORE
SELENIDES
SPINELS
SULFIDES
TEMPERATURE DEPENDENCE
THULIUM COMPOUNDS
YTTERBIUM COMPOUNDS