Searching beyond Gd for magnetocaloric frameworks: magnetic properties and interactions of the Ln(HCO2)3 series

Saines, P.J., Paddison, J.A.M., Thygesen, P.M.M., Tucker, M.G. (2015) Searching beyond Gd for magnetocaloric frameworks: magnetic properties and interactions of the Ln(HCO2)3 series. Materials Horizons, 2 (5). pp. 528-535. ISSN 2051-6347. (doi:10.1039/c5mh00113g) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Official URL
http://dx.doi.org/10.1039/c5mh00113g

Abstract

This study probes the magnetic properties and interactions of the Ln(HCO<inf>2</inf>)<inf>3</inf> (Ln = Tb3+-Er3+) frameworks. We show that the magnetocaloric effect of Tb(HCO<inf>2</inf>)<inf>3</inf> is significantly higher above 4 K in moderate magnetic fields compared to the promising Gd(HCO<inf>2</inf>)<inf>3</inf>. While the peak performance of Tb(HCO<inf>2</inf>)<inf>3</inf> is lower than Gd(HCO<inf>2</inf>)<inf>3</inf>, we also find that the Gd-rich members of the solid solution Gd<inf>1-x</inf>Tb<inf>x</inf>(HCO<inf>2</inf>)<inf>3</inf> blend the advantages of both end-members. Using neutron diffraction experiments, Tb(HCO<inf>2</inf>)<inf>3</inf> is found to be antiferromagnetic below 1.7 K with ferromagnetic face-sharing chains and antiferromagnetic coupling between them. Analysis of magnetic diffuse scattering of the paramagnetic phase indicates that ferromagnetic coupling is retained, and it is likely that this plays a role in improving its magnetocaloric performance in low fields. This journal is © The Royal Society of Chemistry.

Item Type: Article
DOI/Identification number: 10.1039/c5mh00113g
Subjects: Q Science > QC Physics > QC173.45 Condensed Matter
Q Science > QD Chemistry > QD478 Solid State Chemistry
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Paul Saines
Date Deposited: 06 Oct 2015 15:17 UTC
Last Modified: 29 May 2019 16:04 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/50714 (The current URI for this page, for reference purposes)
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