78b4 - 82a7

Kirchmayr, H.; Burzo, E.

doi:10.1007/10333633_44

Cited by 2 publications

(3 citation statements)

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“…Several excellent materials for application as permanent magnets and magnetostrictors have been discovered [6][7][8], thus making Laves phases very interesting research objects from both the scientific and applications viewpoints. For compounds with Ni, on the other hand, no magnetic moment at the nickel atoms is observed, and the magnetic interaction involves only the R sublattice [9,10]. Hence, these compounds are magnetically ordered at relatively low temperatures that reach even below 40 K with the exception of GdNi 2 , where the Curie temperature is equal to 75 K [9].…”

Section: Introductionmentioning

confidence: 99%

“…For compounds with Ni, on the other hand, no magnetic moment at the nickel atoms is observed, and the magnetic interaction involves only the R sublattice [9,10]. Hence, these compounds are magnetically ordered at relatively low temperatures that reach even below 40 K with the exception of GdNi 2 , where the Curie temperature is equal to 75 K [9].…”

Section: Introductionmentioning

confidence: 99%

“…Among the large group of binary RNi 2 compounds, TbNi 2 and ErNi 2 have garnered a significant interest. Their magnetic and magnetocaloric properties have been extensively explored [9][10][11][12]. These compounds are characterized by large heat capacity anomalies observed around the ordering temperatures.…”

Section: Introductionmentioning

confidence: 99%

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Low-Temperature Magnetothermodynamics Performance of Tb1-xErxNi2 Laves-Phases Compounds for Designing Composite Refrigerants

et al. 2022

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In this paper, the results of heat capacity measurements performed on the polycrystalline Tb1-xErxNi2 intermetallic compounds with x = 0.25, 0.5 and 0.75 are presented. The Debye temperatures and lattice contributions as well as the magnetic part of the heat capacity were determined and analyzed. The heat capacity measurements reveal that the substitution of Tb atoms for Er atoms leads to a linear reduction of the Curie temperatures in the investigated compounds. The ordering temperatures decrease from 28.3 K for Tb0.25Er0.75Ni2 to 12.9 K for Tb0.75Er0.25Ni2. Heat capacity measurements enabled us to calculate with good approximation the isothermal magnetic entropy ΔSmag and adiabatic temperature changes ΔTad for Tb1-xErxNi2, for the magnetic field value equal to 1 T and 2 T. The optimal molar ratios of individual Tb0.75Er0.25Ni2, Tb0.5Er0.5Ni2 and Tb0.25Er0.75Ni2 components in the final composite were theoretically determined. According to the obtained results, the investigated composites make promising candidates that can find their application as an active body in a magnetic refrigerator performing an Ericsson cycle at low temperatures. Moreover, for the Tb0.5Er0.5Ni2 compound, direct measurements of adiabatic temperature change in the vicinity of the Curie temperature in the magnetic field up to 14 T were performed. The obtained high-field results are compared to the data for the parent TbNi2 and ErNi2 compounds, and their magnetocaloric properties near the Curie temperature are analyzed in the framework of the Landau theory for the second-order phase transitions.

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