Magnetism and magnetocaloric effect in S=7/2 Heisenberg antiferromagnet Gd2(fum)3(H2O)4·3H2O

Magnetic functionalities in MOFs: from the framework to the pore

“…There have been numerous examples in the literature of the use of magnetic coordination polymers for MCE since the initial reports on Prussian blue analogues, [85][86][87][88] for DB = 5 T), 90 but the sorption of gases has not been demonstrated. However, the combination of porosity and MCE is very scarce, and has only been successfully combined in a couple of examples presented below.…”

A Dense Metal–Organic Framework for Enhanced Magnetic Refrigeration

“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] Refrigeration proceeds adiabatically via the magnetocaloric effect (MCE), which describes the changes of magnetic entropy ( Δ S m ) and adiabatic temperature ( Δ T ad ), following a change in the applied magnetic fi eld ( Δ B ). As in the fi rst paramagnetic salt that permitted sub-Kelvin temperatures to be reached in 1933, [ 16 ] gadolinium is often present because its orbital angular momentum is zero and it has the largest entropy per single ion.…”

“…[11][12][13][14][15] Indeed, the dimensionality of Gd-MOFs has no effect in itself on the MCE, bar its intrinsic density. Light and short bridging ligands, such as the formate ion, are clearly advantageous in this regard.…”

A Metal–Organic Framework as Attractive Cryogenic Magnetorefrigerant

“…Hence, it is still important to identify new materials with large MCE near liquid He temperature. Different kinds of materials have attracted interest for their MCE in this temperature region, including simple paramagnetic salts,3, 7 molecular nanomagnets,8–11 extended porous networks,12 garnets,13 or intermetallic alloys 14. Gadolinium‐based compounds have been largely studied because Gd has a large spin‐only magnetic moment ( S =7/2) which favors a large entropy change (the maximum magnetic entropy amounts to R ln(2 S +1)), together with a negligible hysteresis during the magnetization/demagnetization process.…”