Thermal observables in coupled Cr7Ni molecular rings: Role and quantification of spin-entanglement

Abstract

Large reversible magnetocaloric effect due to a rather unstable antiferromagnetic ground state in Er 4 NiCd

Magnetic entropy change plateau in a geometrically frustrated layered system: FeCrAs-like iron-pnictide structure as a magnetocaloric prototype

“…So far several systems have been found to exhibit MCE at room temperature [1][2][3][4][5][6], generating tremendous expectations for refrigeration and other applications [1][2][3][4][5][6]. There is a wide range of further applications for MCE, for instance, gas liquefaction [1,3], space technologies [7] or tumor-targeting magnetic materials [8], and recently molecular materials have proved to be systems where the understanding of the MO would have a very profound impact [9][10][11][12].…”

“…Although this last approach has been extensively exploited in the last few years the fact that the transitions are usually of first order and that those which are second order occur only within very narrow temperature regimes, gives a strong MCE over only a small temperature range. To locate the maximum value of a MO at a certain working temperature, the peak singularity or the continuous-derivative peak of the observable has to be temperature-shifted, and this has been accomplished only for some families of compounds [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”