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Magnetocaloric Effect in a Mn 2 ‐Pyridazine‐[Nb(CN) 8 ] Molecular Magnetic Sponge
Author(s) -
Fitta Magdalena,
Pełka Robert,
Bałanda Maria,
Czapla Mariusz,
Mihalik Marian,
Pinkowicz Dawid,
Sieklucka Barbara,
Wasiutyński Tadeusz,
Zentkova Maria
Publication year - 2012
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201200374
Subject(s) - magnetic refrigeration , chemistry , condensed matter physics , magnetization , pyridazine , isotropy , crystallography , magnet , magnetic field , stereochemistry , physics , quantum mechanics
A comprehensive study of the magnetocaloric effect (MCE) in the Mn 2 ‐[Nb(CN) 8 ] molecular magnet with a two‐step magnetic sponge behavior is reported. The structural transformations provoked by dehydration bring about an increase in the magnetic ordering temperature ( T c ) from 43 K through to 68 K and up to 98 K. All three phases are soft isotropic ferrimagnets. The change in magnetic entropy in the partially and fully dehydrated phases is smaller than that in the “as synthesized” form by a factor of 0.6. The field dependence of MCE at T c is consistent with the values of the critical exponents derived from the magnetization data.