Magnetic properties and magnetocaloric effect of Tb2Rh3Ge

Baidyanath Sahu; André M. Strydom

doi:10.1016/j.jmmm.2021.168444

Magnetic properties and magnetocaloric effect of Tb₂Rh₃Ge

Baidyanath Sahu, André M. Strydom

Physics

University of Johannesburg

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

We report the structural, and magnetic properties as well as magnetocaloric effect of a polycrystalline compound of Tb₂Rh₃Ge. This compound crystallizes with Mg₂Ni₃Si-type of rhombohedral Laves phases (space group R3‾m, hR18). The magnetic properties and magnetocaloric effect of Tb₂Rh₃Ge are explored through dc-magnetization measurements. Temperature dependence of magnetization revealed that the compound exhibits ferromagnetic behavior with T_C=56 K. The field dependence of magnetization indicates that Tb₂Rh₃Ge is a soft ferromagnet. The obtained isothermal magnetic entropy changes (ΔS_m) and refrigeration capacity (relative cooling power) for a change of magnetic field 0–9 T are 12.74 J kg⁻¹K⁻¹ and 497(680) J/kg respectively. The Arrott plots and universal curve of normalized ΔS_m indicate that this compound undergoes a second order ferromagnetic phase transition.

Original language	English
Article number	168444
Journal	Journal of Magnetism and Magnetic Materials
Volume	541
DOIs	https://doi.org/10.1016/j.jmmm.2021.168444
Publication status	Published - 1 Jan 2022

Keywords

Entropy
Ferromagnet
Magnetocaloric effect
Universal scaling plot

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1016/j.jmmm.2021.168444

Cite this

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title = "Magnetic properties and magnetocaloric effect of Tb2Rh3Ge",

abstract = "We report the structural, and magnetic properties as well as magnetocaloric effect of a polycrystalline compound of Tb2Rh3Ge. This compound crystallizes with Mg2Ni3Si-type of rhombohedral Laves phases (space group R3‾m, hR18). The magnetic properties and magnetocaloric effect of Tb2Rh3Ge are explored through dc-magnetization measurements. Temperature dependence of magnetization revealed that the compound exhibits ferromagnetic behavior with TC=56 K. The field dependence of magnetization indicates that Tb2Rh3Ge is a soft ferromagnet. The obtained isothermal magnetic entropy changes (ΔSm) and refrigeration capacity (relative cooling power) for a change of magnetic field 0–9 T are 12.74 J kg−1K−1 and 497(680) J/kg respectively. The Arrott plots and universal curve of normalized ΔSm indicate that this compound undergoes a second order ferromagnetic phase transition.",

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T1 - Magnetic properties and magnetocaloric effect of Tb2Rh3Ge

AU - Sahu, Baidyanath

AU - Strydom, André M.

PY - 2022/1/1

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N2 - We report the structural, and magnetic properties as well as magnetocaloric effect of a polycrystalline compound of Tb2Rh3Ge. This compound crystallizes with Mg2Ni3Si-type of rhombohedral Laves phases (space group R3‾m, hR18). The magnetic properties and magnetocaloric effect of Tb2Rh3Ge are explored through dc-magnetization measurements. Temperature dependence of magnetization revealed that the compound exhibits ferromagnetic behavior with TC=56 K. The field dependence of magnetization indicates that Tb2Rh3Ge is a soft ferromagnet. The obtained isothermal magnetic entropy changes (ΔSm) and refrigeration capacity (relative cooling power) for a change of magnetic field 0–9 T are 12.74 J kg−1K−1 and 497(680) J/kg respectively. The Arrott plots and universal curve of normalized ΔSm indicate that this compound undergoes a second order ferromagnetic phase transition.

AB - We report the structural, and magnetic properties as well as magnetocaloric effect of a polycrystalline compound of Tb2Rh3Ge. This compound crystallizes with Mg2Ni3Si-type of rhombohedral Laves phases (space group R3‾m, hR18). The magnetic properties and magnetocaloric effect of Tb2Rh3Ge are explored through dc-magnetization measurements. Temperature dependence of magnetization revealed that the compound exhibits ferromagnetic behavior with TC=56 K. The field dependence of magnetization indicates that Tb2Rh3Ge is a soft ferromagnet. The obtained isothermal magnetic entropy changes (ΔSm) and refrigeration capacity (relative cooling power) for a change of magnetic field 0–9 T are 12.74 J kg−1K−1 and 497(680) J/kg respectively. The Arrott plots and universal curve of normalized ΔSm indicate that this compound undergoes a second order ferromagnetic phase transition.

KW - Entropy

KW - Ferromagnet

KW - Magnetocaloric effect

KW - Universal scaling plot

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