Layered gadolinium hydroxides for low-temperature magnetic cooling

Abellán, Gonzalo; Espallargas, Guillermo Mı́nguez; Lorusso, Giulia; Evangelisti, Marco; Coronado, Eugenio

doi:10.1039/c5cc05150a

Cited by 39 publications

(19 citation statements)

References 37 publications

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“…To sum up, although some MOFs presenting MCE have been reported, the values are still far from those of other current state-ofthe-art molecule-based materials. For example, the dense layered material Gd 2 (OH) 5 Cl 1.5 H 2 O has ÀDS m of 51.9 J kg À1 K À1 for DB = 7 T. 93 The low values found in MOFs is a consequence of the intrinsic characteristics of these materials, in particular their low magnetic density. Thus, despite their high chemical stability, which is the major advantage of using MOFs for magnetic refrigeration, their real use is not very promising.…”

Section: Mofs For Magnetic Refrigerationmentioning

confidence: 99%

Magnetic functionalities in MOFs: from the framework to the pore

2018

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In this review, we show the different approaches developed so far to prepare metal-organic frameworks (MOFs) presenting electronic functionalities, with particular attention to magnetic properties. We will cover the chemical design of frameworks necessary for the incorporation of different magnetic phenomena, as well as the encapsulation of functional species in their pores leading to hybrid multifunctional MOFs combining an extended lattice with a molecular lattice.

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Section: Mofs For Magnetic Refrigerationmentioning

confidence: 99%

Magnetic functionalities in MOFs: from the framework to the pore

2018

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“…Maxima of both relevant quantities of interest for MCE can be found approximately at 2 K for Ga-based dimeric system [ 87 ]. Layered Ga hydroxides [ 88 ], GaF

[ 89 ], or Fe

[ 90 ] cluster also exhibit good cooling properties at few K. For the temperatures below 1 K, Ga-containing polyoxometalates can be mentioned [ 91 ]. Last, but not least, experimental studies of V15 polyoxovanadate revealed a maximum isothermal entropy change of about 12.5 J·mol

approximately at 1.5 K for the field variation of 8 T [ 61 ].…”

Section: Final Remarksmentioning

confidence: 99%

Low-Temperature Magnetocaloric Properties of V12 Polyoxovanadate Molecular Magnet: A Theoretical Study

Szałowski

2020

Materials

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The paper presents a computational study of the magnetocaloric properties of the V12 polyoxovanadate molecular magnet. The description is restricted to low-temperature range (below approximately 100 K), where the magnetic properties of the system in question can be sufficiently modelled by considering a tetramer that consists of four vanadium ions with spins S=1/2. The discussion is focused on the magnetocaloric effect in the cryogenic range. The exact and numerical diagonalization of the corresponding Hamiltonian is used in order to construct the thermodynamic description within a version of the canonical ensemble. The thermodynamic quantities of interest, such as magnetic entropy, specific heat, entropy change under isothermal magnetization/demagnetization, temperature change under adiabatic magnetization/demagnetization, refrigerant capacity, and magnetic Grüneisen ratio, are calculated and discussed extensively. The importance of two quantum level crossings for the described properties is emphasized. The significant ranges of direct and inverse magnetocaloric effect are predicted. In particular, the maximized inverse magnetocaloric response is found for cryogenic temperatures.

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“…Recently, Coronado et al studied the MCE of two Gd III ‐based layered hydroxides, 55 and 56 55. Both CPs exhibit significant MCE with maximum –Δ S m values of 51.9 and 42.0 J kg −1 K −1 , respectively, for an applied field of 70 kOe at 2.2 K.…”

Section: Recent Advances In Coordination‐cluster‐based Molecular Magnmentioning

confidence: 99%

“…Among Ln ions, the Gd III ion is usually chosen to construct molecular magnetic refrigerants; this may be attributes to the Gd III ion having a large single‐ion spin ( S =7/2) and negligible anisotropy, resulting from the lack of orbital contribution. Furthermore, the coupled interactions between Gd III ions are always weak, which is fit for acquiring a large MCE to work as an ideal molecular magnetic refrigerant (Tables and ) 25,27,39–57…”

Section: Recent Advances In Coordination‐cluster‐based Molecular Magnmentioning

confidence: 99%

Coordination‐Cluster‐Based Molecular Magnetic Refrigerants

Zhang

Cheng

2016

The Chemical Record

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Coordination polymers serving as molecular magnetic refrigerants have been attracting great interest. In particular, coordination cluster compounds that demonstrate their apparent advantages on cryogenic magnetic refrigerants have attracted more attention in the last five years. Herein, we mainly focus on depicting aspects of syntheses, structures, and magnetothermal properties of coordination clusters that serve as magnetic refrigerants on account of the magnetocaloric effect. The documented molecular magnetic refrigerants are classified into two primary categories according to the types of metal centers, namely, homo- and heterometallic clusters. Every section is further divided into several subgroups based on the metal nuclearity and their dimensionalities, including discrete molecular clusters and those with extended structures constructed from molecular clusters. The objective is to present a rough overview of recent progress in coordination-cluster-based molecular magnetic refrigerants and provide a tutorial for researchers who are interested in the field.

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Layered gadolinium hydroxides for low-temperature magnetic cooling

Abstract: A 2D gadolinium hydroxide with a large magnetocaloric effect is an excellent candidate for cryogenic magnetic refrigeration.

Cited by 39 publications

References 37 publications

Magnetic functionalities in MOFs: from the framework to the pore

Magnetic functionalities in MOFs: from the framework to the pore

Low-Temperature Magnetocaloric Properties of V12 Polyoxovanadate Molecular Magnet: A Theoretical Study

Coordination‐Cluster‐Based Molecular Magnetic Refrigerants

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