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Cryogenic Magnetocaloric Effect in a Ferromagnetic Molecular Dimer
Author(s) -
Evangelisti Marco,
Roubeau Olivier,
Palacios Elias,
Camón Agustín,
Hooper Thomas N.,
Brechin Euan K.,
Alonso Juan J.
Publication year - 2011
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201102640
Subject(s) - magnetic refrigeration , tetrahydrate , ferromagnetism , dimer , condensed matter physics , magnetization , entropy (arrow of time) , materials science , chemistry , crystallography , thermodynamics , physics , nuclear magnetic resonance , crystal structure , quantum mechanics , magnetic field
Molecoolers : An unprecedentedly large cryogenic magnetocaloric effect is observed in gadolinium acetate tetrahydrate (see picture, Gd pink, O red, C gray). The change in its magnetic entropy is ascribed to the high magnetic density combined with dominant ferromagnetism. For the first time in a molecular complex, direct measurements of the magnetocaloric effect corroborate indirect estimates based on heat capacity and magnetization.