The Influence of Hydrogenation on the Structure, Magnetic and Magnetocaloric Properties of Tb–Dy–Co Alloys with a Laves Phase Structure

Journal Article · Mon Jul 15 04:00:00 EDT 2019 · Physics of the Solid State

DOI:https://doi.org/10.1134/S1063783419070278· OSTI ID:22925215

Kaminskaya, T. P.; Chzhan, V. B.; Ovchenkova, Yu. A.; Trusheva, A. S. ^[1]; Viryus, A. A. ^[2]

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1. Moscow State University (Russian Federation)
2. Institute of Experimental Mineralogy, Russian Academy of Sciences (Russian Federation)

A complex study of structure, phase composition, surface topology, magnetic, and magnetocaloric properties was performed for TbCo{sub 2} and Tb{sub 0.3}Dy{sub 0.7}Co{sub 2} compounds and for a Tb{sub 0.3}Dy{sub 0.7}Co{sub 2}H{sub 0.5} hydride with a low hydrogen content. The hydrogenation was established to impact the structural features at the micro- and nanolevels, as well as the fundamental and functional properties. Introducing even a small amount of hydrogen in the crystal lattice of Tb{sub 0.3}Dy{sub 0.7}Co{sub 2} compound is found to cause an increase in both the Curie temperature and the magnetic moment at the cobalt atoms. The magnetic phase transition from the paramagnetic to the magnetically ordered state changes from the first (in Tb{sub 0.3}Dy{sub 0.7}Co{sub 2}) to the second (in TbCo{sub 2} and Tb{sub 0.3}Dy{sub 0.7}Co{sub 2}H{sub 0.5}) order, leading to a noticeable decrease in the magnetocaloric effect.

• OSTI ID: 22925215
• Journal Information: Physics of the Solid State, Journal Name: Physics of the Solid State Journal Issue: 7 Vol. 61; ISSN 1063-7834
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COBALT
CRYSTAL LATTICES
CURIE POINT
HYDRIDES
HYDROGENATION
LAVES PHASES
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
PARAMAGNETISM
PHASE TRANSFORMATIONS
TERBIUM COMPOUNDS
TOPOLOGY
YTTERBIUM COMPLEXES