Gaudefroyite: a mineral with excellent magnetocaloric effect suitable for liquefying hydrogen

Rukang Li; Guangjing Li; Colin Greaves

doi:10.1039/C7TA06883B

Gaudefroyite: a mineral with excellent magnetocaloric effect suitable for liquefying hydrogen

Rukang Li
, Guangjing Li
, Colin Greaves

Chemistry

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

9 Citations (Scopus)

169 Downloads (Pure)

Abstract

Gaudefroyite contains chains of edge-linked MnO6 octahedra on a Kagomé lattice which results in magnetic frustration between the chains and overall spin-liquid behaviour below 9 K. Magnetization and specific heat measurements indicate very large entropy increases for temperatures of 10–30 K on removal of applied magnetic fields as low as 2 T. This is attributed to the degenerate magnetic ground states originating from the frustrated Kagomé lattice. Direct temperature change measurements confirm that the mineral has excellent low-field magnetocaloric properties suitable for refrigeration to produce liquid hydrogen.

Original language	English
Journal	Journal of Materials Chemistry A
Early online date	13 Sept 2017
DOIs	https://doi.org/10.1039/C7TA06883B
Publication status	E-pub ahead of print - 13 Sept 2017

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title = "Gaudefroyite: a mineral with excellent magnetocaloric effect suitable for liquefying hydrogen",

abstract = "Gaudefroyite contains chains of edge-linked MnO6 octahedra on a Kagom{\'e} lattice which results in magnetic frustration between the chains and overall spin-liquid behaviour below 9 K. Magnetization and specific heat measurements indicate very large entropy increases for temperatures of 10–30 K on removal of applied magnetic fields as low as 2 T. This is attributed to the degenerate magnetic ground states originating from the frustrated Kagom{\'e} lattice. Direct temperature change measurements confirm that the mineral has excellent low-field magnetocaloric properties suitable for refrigeration to produce liquid hydrogen.",

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year = "2017",

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AU - Li, Rukang

AU - Li, Guangjing

AU - Greaves, Colin

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Y1 - 2017/9/13

N2 - Gaudefroyite contains chains of edge-linked MnO6 octahedra on a Kagomé lattice which results in magnetic frustration between the chains and overall spin-liquid behaviour below 9 K. Magnetization and specific heat measurements indicate very large entropy increases for temperatures of 10–30 K on removal of applied magnetic fields as low as 2 T. This is attributed to the degenerate magnetic ground states originating from the frustrated Kagomé lattice. Direct temperature change measurements confirm that the mineral has excellent low-field magnetocaloric properties suitable for refrigeration to produce liquid hydrogen.

AB - Gaudefroyite contains chains of edge-linked MnO6 octahedra on a Kagomé lattice which results in magnetic frustration between the chains and overall spin-liquid behaviour below 9 K. Magnetization and specific heat measurements indicate very large entropy increases for temperatures of 10–30 K on removal of applied magnetic fields as low as 2 T. This is attributed to the degenerate magnetic ground states originating from the frustrated Kagomé lattice. Direct temperature change measurements confirm that the mineral has excellent low-field magnetocaloric properties suitable for refrigeration to produce liquid hydrogen.

UR - https://www.scopus.com/pages/publications/85044757311

U2 - 10.1039/C7TA06883B

DO - 10.1039/C7TA06883B

M3 - Article

SN - 2050-7488

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

ER -

Gaudefroyite: a mineral with excellent magnetocaloric effect suitable for liquefying hydrogen

Abstract

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