TY  - JOUR
AB  - A [DyFeDy(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, (57)Fe 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 Dy(III) ions.
AU  - Peng, Yan
AU  - Mereacre, Valeriu
AU  - Anson, Christopher E
AU  - Powell, Annie K
DA  - 20160803
DO  - 10.1039/c6cp02942f
KW  - Hyperfine Structure ; Physical Chemistry ; Magnetic Properties ; Clusters ; Mossbauer Effect ; Magnetic Permeability ; Mossbauer Spectroscopy ; Iron ; Miscellaneous Sciences (So) ; Chemical and Electrochemical Properties (MD) ; Chemical and Electrochemical Properties (Ep) ; Chemical and Electrochemical Properties (Ed) ; Chemical and Electrochemical Properties (EC);
LA  - eng
PY  - 20160803
SN  - 1463-9084
SN  - 1463-9076
SP  - 21469
T2  - Physical chemistry chemical physics : PCCP
TI  - Multiple superhyperfine fields in a {DyFe2Dy} coordination cluster revealed using bulk susceptibility and (57)Fe Mössbauer studies
Y2  - 2021-03-04T11:23:18+01:00
ER  -