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Multiple superhyperfine fields in a {DyFe2Dy} coordination cluster revealed using bulk susceptibility and Fe-57 Mossbauer studies

Peng, Yan; Mereacre, Valeriu; Anson, Christopher E.; Powell, Annie K.

Abstract (englisch): A [DyFeIII2Dy(μ3-OH)2(pmide)2(p-Me-PhCO2)6] coordination cluster, where pmideH2 = N-(2-pyridylmethyl)iminodiethanol, has been synthesized and the magnetic properties studied. The dc magnetic measurements reveal dominant antiferromagnetic interactions between the metal centres. The ac measurements reveal zero-field quantum tunnelling of the magnetisation (QTM) which can be understood, but not adequately modelled, in terms of at least three relaxation processes when appropriate static (dc) fields are applied. To investigate this further, 57Fe Mössbauer spectroscopy was used and well-resolved nuclear hyperfine structures could be observed, showing that on the Mössbauer time scale, without applied field or else with very small applied fields, the iron nuclei experience three or more superhyperfine fields arising from the slow magnetisation reversal of the strongly polarized fields of the DyIII ions.

Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Institut für Anorganische Chemie (AOC)
Publikationstyp Zeitschriftenaufsatz
Jahr 2016
Sprache Englisch
Identifikator DOI: 10.1039/c6cp02942f
ISSN: 1463-9076, 1463-9084
URN: urn:nbn:de:swb:90-598861
KITopen ID: 1000059886
HGF-Programm 43.21.04; LK 01
Erschienen in Physical chemistry, chemical physics
Band 18
Heft 31
Seiten 21469-21480
Bemerkung zur Veröffentlichung Creative Commons Attribution 3.0 Unported Licence
RSC geförderter Open Access-Artikel
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