Vallone, SP, Tantillo, AN, Dos Santos, AM et al. (6 more authors) (2019) Giant Barocaloric Effect at the Spin Crossover Transition of a Molecular Crystal. Advanced Materials, 31 (23). 1807334. ISSN 0935-9648
Abstract
The first experimental evidence for a giant, conventional barocaloric effect (BCE) associated with a pressure‐driven spin crossover transition near room temperature is provided. Magnetometry, neutron scattering, and calorimetry are used to explore the pressure dependence of the SCO phase transition in polycrystalline samples of protonated and partially deuterated [FeL2][BF4]2 [L = 2,6‐di(pyrazol‐1‐yl)pyridine] at applied pressures of up to 120 MPa (1200 bar). The data indicate that, for a pressure change of only 0–300 bar (0–30 MPa), an adiabatic temperature change of 3 K is observed at 262 K or 257 K in the protonated and deuterated materials, respectively. This BCE is equivalent to the magnetocaloric effect (MCE) observed in gadolinium in a magnetic field change of 0–1 Tesla. The work confirms recent predictions that giant, conventional BCEs will be found in a wide range of SCO compounds.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim. This is the peer reviewed version of the following article: Vallone, S. P., Tantillo, A. N., dos Santos, A. M., Molaison, J. J., Kulmaczewski, R., Chapoy, A., Ahmadi, P., Halcrow, M. A., Sandeman, K. G., Giant Barocaloric Effect at the Spin Crossover Transition of a Molecular Crystal. Adv. Mater. 2019, 31, 1807334, which has been published in final form at https://doi.org/10.1002/adma.201807334. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | barocaloric effect; deuteration; solid‐state cooling; spin crossover |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemistry (Leeds) > Inorganic Chemistry (Leeds) |
Funding Information: | Funder Grant number EPSRC EP/K012568/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 21 Mar 2019 14:37 |
Last Modified: | 15 Apr 2020 00:38 |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1002/adma.201807334 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:143940 |