Large magnetocaloric effect in Ho2Pd2Pb

Baidyanath Sahu; R. Djoumessi Fobasso; Buyisiwe M. Sondezi; André M. Strydom

doi:10.1016/j.mtcomm.2022.103327

Large magnetocaloric effect in Ho₂Pd₂Pb

Baidyanath Sahu, R. Djoumessi Fobasso, Buyisiwe M. Sondezi, André M. Strydom

Physics

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

3 Citations (Scopus)

Abstract

We report the magnetocaloric effect (MCE) in a polycrystalline plumbide sample of Ho₂Pd₂Pb. Arc-melted Ho₂Pd₂Pb crystallizes in Mo₂B₂Fe type of tetragonal crystal structure and shows an antiferromagnetic behaviour with Néel temperature of 4.5 K. The Arrott plots indicate that Ho₂Pd₂Pb undergoes a second order antiferromagnetic phase transition. The calculated isothermal magnetic entropy change (ΔS_m), and relative power cooling (refrigeration capacity) for a change of field 0–8 T are 17.8 J kg⁻¹ K⁻¹, and 680(497) J kg⁻¹ respectively. The obtained results revealed that Ho₂Pd₂Pb belongs to a family of large MCE magnetic materials.

Original language	English
Article number	103327
Journal	Materials Today Communications
Volume	31
DOIs	https://doi.org/10.1016/j.mtcomm.2022.103327
Publication status	Published - Jun 2022

Keywords

Antiferromagnet
Entropy change
Second order
Tetragonal

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Materials Chemistry

Access to Document

10.1016/j.mtcomm.2022.103327

Cite this

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title = "Large magnetocaloric effect in Ho2Pd2Pb",

abstract = "We report the magnetocaloric effect (MCE) in a polycrystalline plumbide sample of Ho2Pd2Pb. Arc-melted Ho2Pd2Pb crystallizes in Mo2B2Fe type of tetragonal crystal structure and shows an antiferromagnetic behaviour with N{\'e}el temperature of 4.5 K. The Arrott plots indicate that Ho2Pd2Pb undergoes a second order antiferromagnetic phase transition. The calculated isothermal magnetic entropy change (ΔSm), and relative power cooling (refrigeration capacity) for a change of field 0–8 T are 17.8 J kg−1 K−1, and 680(497) J kg−1 respectively. The obtained results revealed that Ho2Pd2Pb belongs to a family of large MCE magnetic materials.",

keywords = "Antiferromagnet, Entropy change, Second order, Tetragonal",

author = "Baidyanath Sahu and Fobasso, {R. Djoumessi} and Sondezi, {Buyisiwe M.} and Strydom, {Andr{\'e} M.}",

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year = "2022",

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doi = "10.1016/j.mtcomm.2022.103327",

language = "English",

volume = "31",

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TY - JOUR

T1 - Large magnetocaloric effect in Ho2Pd2Pb

AU - Sahu, Baidyanath

AU - Fobasso, R. Djoumessi

AU - Sondezi, Buyisiwe M.

AU - Strydom, André M.

PY - 2022/6

Y1 - 2022/6

N2 - We report the magnetocaloric effect (MCE) in a polycrystalline plumbide sample of Ho2Pd2Pb. Arc-melted Ho2Pd2Pb crystallizes in Mo2B2Fe type of tetragonal crystal structure and shows an antiferromagnetic behaviour with Néel temperature of 4.5 K. The Arrott plots indicate that Ho2Pd2Pb undergoes a second order antiferromagnetic phase transition. The calculated isothermal magnetic entropy change (ΔSm), and relative power cooling (refrigeration capacity) for a change of field 0–8 T are 17.8 J kg−1 K−1, and 680(497) J kg−1 respectively. The obtained results revealed that Ho2Pd2Pb belongs to a family of large MCE magnetic materials.

AB - We report the magnetocaloric effect (MCE) in a polycrystalline plumbide sample of Ho2Pd2Pb. Arc-melted Ho2Pd2Pb crystallizes in Mo2B2Fe type of tetragonal crystal structure and shows an antiferromagnetic behaviour with Néel temperature of 4.5 K. The Arrott plots indicate that Ho2Pd2Pb undergoes a second order antiferromagnetic phase transition. The calculated isothermal magnetic entropy change (ΔSm), and relative power cooling (refrigeration capacity) for a change of field 0–8 T are 17.8 J kg−1 K−1, and 680(497) J kg−1 respectively. The obtained results revealed that Ho2Pd2Pb belongs to a family of large MCE magnetic materials.

KW - Antiferromagnet

KW - Entropy change

KW - Second order

KW - Tetragonal

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