Magnetocaloric Properties of R3Ga5 O12 (R=Tb, Gd, Nd, Dy)

M. Kleinhans; K. Eibensteiner; J. C. Leiner; C. Resch; L. Worch; M. A. Wilde; J. Spallek; A. Regnat; C. Pfleiderer

doi:10.1103/PhysRevApplied.19.014038

Magnetocaloric Properties of R3Ga5 O12 (R=Tb, Gd, Nd, Dy)

M. Kleinhans, K. Eibensteiner, J. C. Leiner, C. Resch, L. Worch, M. A. Wilde, J. Spallek, A. Regnat, C. Pfleiderer

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

15 Scopus citations

Abstract

We report the characteristic magnetic properties of several members of the family of rare-earth garnets, Gd3Ga5O12 (GGG), Dy3Ga5O12, Tb3Ga5O12, and Nd3Ga5O12, and compare their relative potential utility for magnetocaloric cooling, including their minimal adiabatic demagnetization refrigeration (ADR) temperatures and relative cooling parameters. A main objective of this work concerns the identification of potential improvements over the magnetocaloric properties of GGG for use in low-temperature ADR cryostats. Using Tb+3 and Dy+3 at the rare-earth site offers, in principle, a higher saturation magnetization and Nd+3 gives a lower de Gennes factor and therefore potentially reduced magnetic transition temperatures, limiting the useful temperature range. Our results show that Dy3Ga5O12 yields an optimal relative cooling parameter at low applied fields and low limiting temperatures, which would allow for the design of more efficient ADR cryostats.

Original language	English
Article number	014038
Journal	Physical Review Applied
Volume	19
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevApplied.19.014038
State	Published - Jan 2023
Externally published	Yes

Funding

We thank A. Bauer and S. Mayr for assistance with the experiments and fruitful discussions. This study has been funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under TRR80 (from Electronic Correlations to Functionality, Project No. 107745057, Projects E1 and F2), SPP2137 (Skyrmionics, Project No. 403191981, Grant No. PF393/19), and the excellence cluster MCQST under Germany’s Excellence Strategy EXC-2111 (Project No. 390814868). Financial support by the German Bundesministerium für Bildung und Forschung (BMBF, Federal Ministry for Education and Research) through the Project No. 13N15021 (“MARQUAND - Magnetische Dauerkühlung für Quantendetektoren”), Project No. 05K19W05 (“Resonante Longitudinale MIASANS Spin-Echo Spektroskopie an RESEDA”), and the European Research Council (ERC) through Advanced Grants No. 291079 (TOPFIT) and No. 788031 (ExQuiSid) is gratefully acknowledged.

Funders	Funder number
Magnetische Dauerkühlung für Quantendetektoren	05K19W05
European Research Council	291079, 788031
Deutsche Forschungsgemeinschaft	SPP2137, 403191981, PF393/19, 107745057, TRR80
Bundesministerium für Bildung und Forschung	13N15021
Munich Center for Quantum Science and Technology	390814868, EXC-2111

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10.1103/PhysRevApplied.19.014038

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title = "Magnetocaloric Properties of R3Ga5 O12 (R=Tb, Gd, Nd, Dy)",

abstract = "We report the characteristic magnetic properties of several members of the family of rare-earth garnets, Gd3Ga5O12 (GGG), Dy3Ga5O12, Tb3Ga5O12, and Nd3Ga5O12, and compare their relative potential utility for magnetocaloric cooling, including their minimal adiabatic demagnetization refrigeration (ADR) temperatures and relative cooling parameters. A main objective of this work concerns the identification of potential improvements over the magnetocaloric properties of GGG for use in low-temperature ADR cryostats. Using Tb+3 and Dy+3 at the rare-earth site offers, in principle, a higher saturation magnetization and Nd+3 gives a lower de Gennes factor and therefore potentially reduced magnetic transition temperatures, limiting the useful temperature range. Our results show that Dy3Ga5O12 yields an optimal relative cooling parameter at low applied fields and low limiting temperatures, which would allow for the design of more efficient ADR cryostats.",

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AU - Kleinhans, M.

AU - Eibensteiner, K.

AU - Leiner, J. C.

AU - Resch, C.

AU - Worch, L.

AU - Wilde, M. A.

AU - Spallek, J.

AU - Regnat, A.

AU - Pfleiderer, C.

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AB - We report the characteristic magnetic properties of several members of the family of rare-earth garnets, Gd3Ga5O12 (GGG), Dy3Ga5O12, Tb3Ga5O12, and Nd3Ga5O12, and compare their relative potential utility for magnetocaloric cooling, including their minimal adiabatic demagnetization refrigeration (ADR) temperatures and relative cooling parameters. A main objective of this work concerns the identification of potential improvements over the magnetocaloric properties of GGG for use in low-temperature ADR cryostats. Using Tb+3 and Dy+3 at the rare-earth site offers, in principle, a higher saturation magnetization and Nd+3 gives a lower de Gennes factor and therefore potentially reduced magnetic transition temperatures, limiting the useful temperature range. Our results show that Dy3Ga5O12 yields an optimal relative cooling parameter at low applied fields and low limiting temperatures, which would allow for the design of more efficient ADR cryostats.

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Magnetocaloric Properties of R3Ga5 O12 (R=Tb, Gd, Nd, Dy)

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