Magnetovolume effects and effect of pressure on the temperature dependence of sublattice magnetization in Ho(Co{sub 0.9}Ga{sub 0.1}){sub 2} compounds

The temperature dependence of the magnetic moments of cobalt and holmium ions in the temperature range of 5–300 K at pressures of P = 0 and 5 kbar was determined based on neutron diffraction data on Ho(Co{sub 0.9}Ga{sub 0.1}){sub 2} intermetallide. The temperature dependence of the lattice parameter...

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Bibliographic Details
Published in:Crystallography reports 2016-01, Vol.61 (1)
Main Authors: Valiev, E. Z., Teplykh, A. E.
Format: Article
Language:English
Subjects:
COBALT
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
COUPLING CONSTANTS
EXCHANGE INTERACTIONS
GALLIUM
HOLMIUM
HOLMIUM IONS
INTERMETALLIC COMPOUNDS
LATTICE PARAMETERS
MAGNETIC MOMENTS
MAGNETIZATION
MAGNETOSTRICTION
NEUTRON DIFFRACTION
PHASE TRANSFORMATIONS
TEMPERATURE DEPENDENCE
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Summary:The temperature dependence of the magnetic moments of cobalt and holmium ions in the temperature range of 5–300 K at pressures of P = 0 and 5 kbar was determined based on neutron diffraction data on Ho(Co{sub 0.9}Ga{sub 0.1}){sub 2} intermetallide. The temperature dependence of the lattice parameter was established, and the spontaneous bulk magnetostriction was determined. These quantities were calculated using the exchange striction model of a ferrimagnet, and good agreement with the experiment was obtained. The parameters of the exchange interaction between pairs of atoms of this compound and the magnetoelastic coupling constant were estimated. An original interpretation of the nature of the first-order magnetic phase transition in HoCo{sub 2} is proposed.
ISSN:1063-7745
1562-689X
DOI:10.1134/S1063774516010259