On-surface magnetocaloric effect for a van der Waals Gd(III) 2D MOF grown on Si

Subodh Kumar; Guillem Gabarró Riera; Ana Arauzo; Jakub Hrubý; Stephen Hill; Lapo Bogani; Juan Rubio-Zuazo; Jesús Jover; Elena Bartolomé; E. Carolina Sañudo

doi:10.1039/D3TA06648G

On-surface magnetocaloric effect for a van der Waals Gd(iii) 2D MOF grown on Si†

Subodh Kumar,^ab Guillem Gabarró Riera,

^ab Ana Arauzo,

^c Jakub Hrubý,^d Stephen Hill,

^de Lapo Bogani,

^f Juan Rubio-Zuazo,^gh Jesús Jover,

^ai Elena Bartolomé

*^j and E. Carolina Sañudo

*^ab

Author affiliations

* Corresponding authors

^a Institut de Nanociències i Nanotecnologia, Universitat de Barcelona (IN2UB), 08028 Barcelona, Spain
E-mail: esanudo-at-ub.edu

^b Departament de Química Inorgànica i Orgànica, Secció de Química Inorgànica, C/Martí i Franqués 1-11, Barcelona, Spain

^c Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, Departamento de Física de la Materia Condensada, 50009 Zaragoza, Spain

^d National High Magnetic Field Laboratory, Tallahassee, FL 32310, USA

^e Department of Physics, Florida State University, Tallahassee, FL 32306, USA

^f Department of Materials, University of Oxford, 16 Parks Road, Oxford, UK

^g BM25-SpLine Beamline at the ESRF, 71 Avenue des Martyrs, Grenoble, France

^h Instituto de Ciencia de Materiales de Madrid-CSIC, Sor Juana Inés de la Cruz, 3, Cantoblanco, 28049 Madrid, Spain

ⁱ Institut de Química Teórica i Computacional (IQTC), Department of Inorganic and Organic Chemistry, Faculty of Chemistry, University of Barcelona, Spain

^j Institut de Ciència de Materials de Barcelona (ICMAB), CSIC, Campus UAB, 08193 Barcelona, Spain
E-mail: ebartolome-at-icmab.es

Abstract

Gd complexes have been studied as magnetic coolants due to their large magneto-caloric effect. In this work we present a Gd 2D metal–organic framework (MOF) of formula [Gd(MeCOO)(PhCOO)₂] (1). We characterize the magnetic properties of 1, showing that it displays slow relaxation of the magnetization by ac susceptibility, and single-ion magnetic anisotropy using high-field EPR. By heat capacity and magnetization vs. field at various temperatures we determine the magnetic entropy change of compound 1. We then grow 1 on functionalized silicon, and show that the surface-deposited 2D MOF 1Si can be used as an on-surface magnetic cryogenic coolant.

This article is part of the themed collection: Functional Framework Materials

Journal of Materials Chemistry A

On-surface magnetocaloric effect for a van der Waals Gd(iii) 2D MOF grown on Si†

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On-surface magnetocaloric effect for a van der Waals Gd(III) 2D MOF grown on Si

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