Large magnetocaloric effect in RE8Pd24Ga (RE = Gd, Tb and Dy) series of compounds

J. J. Mboukam; M. B. Tchoula Tchokonté; A. K.H. Bashir; B. M. Sondezi; B. N. Sahu; A. M. Strydom; D. Kaczorowski

doi:10.1016/j.jallcom.2019.152228

Large magnetocaloric effect in RE₈Pd₂₄Ga (RE = Gd, Tb and Dy) series of compounds

J. J. Mboukam, M. B. Tchoula Tchokonté, A. K.H. Bashir, B. M. Sondezi, B. N. Sahu, A. M. Strydom, D. Kaczorowski

Physics

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

4 Citations (Scopus)

Abstract

We report on the low-temperature physical properties of RE₈Pd₂₄Ga (RE = Gd, Tb and Dy) compounds studied by means of thermodynamic and electronic transport measurements. The three compounds exhibit a putative antiferromagnetic ordering. In the paramagnetic region, their magnetic susceptibility follows the Curie-Weiss relation with effective magnetic moments close to those expected for the respective RE³⁺ ions. Gd₈Pd₂₄Ga and Dy₈Pd₂₄Ga undergo another magnetic phase transitions in the ordered state. In fairly small magnetic fields, the magnetization of Tb₈Pd₂₄Ga and Dy₈Pd₂₄Ga reveals a metamagnetic-like transition that bears a first-order character. All three compounds studied exhibit magnetocaloric effect of the magnitude similar to those reported for materials applicable as magnetic refrigerants.

Original language	English
Article number	152228
Journal	Journal of Alloys and Compounds
Volume	814
DOIs	https://doi.org/10.1016/j.jallcom.2019.152228
Publication status	Published - 25 Jan 2020

Keywords

65.40Gr
72.15Qm
75.30Ds
75.30Sg
75.40Cx
75.50Ee
Antiferromagnetism
Electrical resistivity
Heat capacity numbers: 71.20Lp
Magnetocaloric effect
Metamagnetism
Spin-wave

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2019.152228

Cite this

@article{92a9c852fee24a8fb0519a4a7569b8f4,

title = "Large magnetocaloric effect in RE8Pd24Ga (RE = Gd, Tb and Dy) series of compounds",

abstract = "We report on the low-temperature physical properties of RE8Pd24Ga (RE = Gd, Tb and Dy) compounds studied by means of thermodynamic and electronic transport measurements. The three compounds exhibit a putative antiferromagnetic ordering. In the paramagnetic region, their magnetic susceptibility follows the Curie-Weiss relation with effective magnetic moments close to those expected for the respective RE3+ ions. Gd8Pd24Ga and Dy8Pd24Ga undergo another magnetic phase transitions in the ordered state. In fairly small magnetic fields, the magnetization of Tb8Pd24Ga and Dy8Pd24Ga reveals a metamagnetic-like transition that bears a first-order character. All three compounds studied exhibit magnetocaloric effect of the magnitude similar to those reported for materials applicable as magnetic refrigerants.",

keywords = "65.40Gr, 72.15Qm, 75.30Ds, 75.30Sg, 75.40Cx, 75.50Ee, Antiferromagnetism, Electrical resistivity, Heat capacity numbers: 71.20Lp, Magnetocaloric effect, Metamagnetism, Spin-wave",

author = "Mboukam, {J. J.} and {Tchoula Tchokont{\'e}}, {M. B.} and Bashir, {A. K.H.} and Sondezi, {B. M.} and Sahu, {B. N.} and Strydom, {A. M.} and D. Kaczorowski",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2020",

month = jan,

day = "25",

doi = "10.1016/j.jallcom.2019.152228",

language = "English",

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journal = "Journal of Alloys and Compounds",

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TY - JOUR

T1 - Large magnetocaloric effect in RE8Pd24Ga (RE = Gd, Tb and Dy) series of compounds

AU - Mboukam, J. J.

AU - Tchoula Tchokonté, M. B.

AU - Bashir, A. K.H.

AU - Sondezi, B. M.

AU - Sahu, B. N.

AU - Strydom, A. M.

AU - Kaczorowski, D.

PY - 2020/1/25

Y1 - 2020/1/25

N2 - We report on the low-temperature physical properties of RE8Pd24Ga (RE = Gd, Tb and Dy) compounds studied by means of thermodynamic and electronic transport measurements. The three compounds exhibit a putative antiferromagnetic ordering. In the paramagnetic region, their magnetic susceptibility follows the Curie-Weiss relation with effective magnetic moments close to those expected for the respective RE3+ ions. Gd8Pd24Ga and Dy8Pd24Ga undergo another magnetic phase transitions in the ordered state. In fairly small magnetic fields, the magnetization of Tb8Pd24Ga and Dy8Pd24Ga reveals a metamagnetic-like transition that bears a first-order character. All three compounds studied exhibit magnetocaloric effect of the magnitude similar to those reported for materials applicable as magnetic refrigerants.

AB - We report on the low-temperature physical properties of RE8Pd24Ga (RE = Gd, Tb and Dy) compounds studied by means of thermodynamic and electronic transport measurements. The three compounds exhibit a putative antiferromagnetic ordering. In the paramagnetic region, their magnetic susceptibility follows the Curie-Weiss relation with effective magnetic moments close to those expected for the respective RE3+ ions. Gd8Pd24Ga and Dy8Pd24Ga undergo another magnetic phase transitions in the ordered state. In fairly small magnetic fields, the magnetization of Tb8Pd24Ga and Dy8Pd24Ga reveals a metamagnetic-like transition that bears a first-order character. All three compounds studied exhibit magnetocaloric effect of the magnitude similar to those reported for materials applicable as magnetic refrigerants.

KW - 65.40Gr

KW - 72.15Qm

KW - 75.30Ds

KW - 75.30Sg

KW - 75.40Cx

KW - 75.50Ee

KW - Antiferromagnetism

KW - Electrical resistivity

KW - Heat capacity numbers: 71.20Lp

KW - Magnetocaloric effect

KW - Metamagnetism

KW - Spin-wave

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U2 - 10.1016/j.jallcom.2019.152228

DO - 10.1016/j.jallcom.2019.152228

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SN - 0925-8388

VL - 814

JO - Journal of Alloys and Compounds

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