Magnetic Properties and Specific Heat of Laves Phase Tb_{1-x}Sc_{x}Ni_2 (x = 0.1, 0.2) Solid Solutions

• Authors: J. Ćwik , T. Palewski , K. Nenkov , J. Lyubina , J. Warchulska , O. Gutfleisch , J. Klamut
• Languages of publication: EN

Abstracts

EN

Magnetic and specific heat measurements have been performed on polycrystalline TbNi_2, ScNi_2 and their solid solutions Tb_{1-x}Sc_{x}Ni_2 (x = 0.1, 0.2). These compounds were synthesized using high-purity rare-earth metals. It has been found that the magnetic susceptibility of the nonmagnetic ScNi_2 compound exhibits a very weak temperature dependence characteristic of the Pauli paramagnets. TbNi_2, Tb_{0.9}Sc_{0.1}Ni_2 and Tb_{0.8}Sc_{0.2}Ni_2 are typical Curie-Weiss paramagnets and are ferromagnetically ordered below 36 K. As revealed by room-temperature X-ray powder diffraction all the Tb_{1-x}Sc_{x}Ni_2 solid solutions have the cubic Laves C15-type superstructure. The Debye temperature, phonon and conduction electron contributions as well as the magnetic part of heat capacity were determined. The magnetocaloric effect has been studied by means of specific heat measurements in magnetic fields of 0.42 and 1 T. The effect of rare-earth substitution in ScNi_2 on the magnetic and magnetocaloric properties will be discussed.

Keywords

EN

75.30.-m; 75.30.Cr; 75.40.-s; 75.85.+t

Discipline

• 75.30.Cr: Saturation moments and magnetic susceptibilities
• 75.85.+t: Magnetoelectric effects, multiferroics(for multiferroics and magnetoelectric films, see 77.55.Nv)
• 75.40.-s: Critical-point effects, specific heats, short-range order(for equilibrium properties near critical points, see 64.60.F-; for dynamical critical phenomena, see 64.60.Ht)
• 75.30.-m: Intrinsic properties of magnetically ordered materials(for critical point effects, see 75.40.-s; for magnetotransport phenomena, see 75.47.-m)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 118
• Issue: 5
• Pages: 877-878

Dates

published

2010-11

Contributors

author

J. Ćwik

• International Laboratory of High Magnetic Fields and Low Temperatures, Gajowicka 95, 53-421 Wrocław, Poland

author

T. Palewski

• International Laboratory of High Magnetic Fields and Low Temperatures, Gajowicka 95, 53-421 Wrocław, Poland

author

K. Nenkov

• International Laboratory of High Magnetic Fields and Low Temperatures, Gajowicka 95, 53-421 Wrocław, Poland
• IFW Dresden, Postfach 270016, 01171 Dresden, Germany

author

J. Lyubina

• IFW Dresden, Postfach 270016, 01171 Dresden, Germany

author

J. Warchulska

• International Laboratory of High Magnetic Fields and Low Temperatures, Gajowicka 95, 53-421 Wrocław, Poland

author

O. Gutfleisch

• IFW Dresden, Postfach 270016, 01171 Dresden, Germany

author

J. Klamut

• International Laboratory of High Magnetic Fields and Low Temperatures, Gajowicka 95, 53-421 Wrocław, Poland
• Institute of Low Temperature and Structure Research, PAS, Okólna 2, 50-422 Wrocław, Poland

References

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• 5. J. Ćwik, Ph.D. Thesis, International Laboratory of High Magnetic Fields and Low Temperatures of PAS, Wrocław 2006
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Identifiers

DOI

10.12693/APhysPolA.118.877