Magnetic coupling in CaCu sub 5 -type rare-earth cobalt compounds

Journal Article · Mon Apr 15 00:00:00 EDT 1991 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.347968· OSTI ID:5493282

Liu, J P; Zhong, X P; de Boer, F R ^[1]; Buschow, K H.J. ^[2]

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1. Natuurkundig Laboratorium, University of Amsterdam, Valckenierstraat 65, 1018 XE Amsterdam, The Netherlands (NL)
2. Philips Research Laboratories, P.O. Box 80.000, 5600 JA Eindhoven, (The Netherlands)

The composition of rare-earth cobalt compounds of the hexagonal CaCu{sub 5}-structure type varies from RCo{sub 5} to approximately RCo{sub 6} when passing through the lanthanide series. We have studied the field dependence (up to 35 T) at 4.2 K of the magnetization of several compounds of this series, including various pseudobinary compounds of the type R{sub 1{minus}{ital x}}Y{sub {ital x}}Co{sub 5+{delta}} and GdCo{sub 5{minus}{ital r}}Ni{sub {ital r}}. The magnetic isotherms at 4.2 K were analyzed with a mean-field model. The magnetic coupling constant {ital J}{sub RT} between the moments of the rare-earth (R) and 3{ital d} (T) element in the Hamiltonian {ital H} = {minus}{Sigma}2{ital J}{sub RT}{ital S}{sub R}{center dot}{ital S}{sub T} derived from these measurements was found to have a tendency to decrease with increasing atomic number of the lanthanide involved.

• OSTI ID: 5493282
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 69:8; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
COBALT COMPOUNDS
EXCHANGE INTERACTIONS
INTERACTIONS
MAGNETIC FIELDS
MAGNETIC PROPERTIES
MAGNETIZATION
MEAN-FIELD THEORY
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ULTRALOW TEMPERATURE
YTTRIUM COMPOUNDS