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

Peng, Yan 1,2; Mereacre, Valeriu 1; Anson, Christopher E. 1; Powell, Annie K. 1,2
1 Institut für Anorganische Chemie (AOC), Karlsruher Institut für Technologie (KIT)
2 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)

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.

Verlagsausgabe §
DOI: 10.5445/IR/1000059886
DOI: 10.1039/c6cp02942f
Zitationen: 20
Web of Science
Zitationen: 18
Zitationen: 22
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Anorganische Chemie (AOC)
Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2016
Sprache Englisch
Identifikator ISSN: 1463-9076, 1463-9084
KITopen-ID: 1000059886
HGF-Programm 43.21.04 (POF III, LK 01) Molecular Engineering
Erschienen in Physical chemistry, chemical physics
Verlag Royal Society of Chemistry (RSC)
Band 18
Heft 31
Seiten 21469-21480
Bemerkung zur Veröffentlichung Creative Commons Attribution 3.0 Unported Licence
RSC geförderter Open Access-Artikel
Nachgewiesen in Dimensions
Web of Science
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