Published July 1990 | Version v1
Journal article Metadata-only

Relaxation effects in Moessbauer spectra of bridged seven-coordinate Fe3+ pairs

Creators

  • 1. Canterbury Univ., Christchurch (New Zealand)
  • 2. Liverpool Univ. (UK). Dept. of Physics

Description

The compound [Fe2L(H2O)4] (ClO4)4.H2O which contains pairs of Fe3+ ions within a binucleating macrocylce derived from Schiff base condensation of 2,6-diacetylpyridine and 1,3-diamino-2-hydroxy-propane has been studied by magnetic susceptibility measurements and 57Fe Moessbauer spectroscopy between 4.2 K and 300 K, and its crystal structure determined. The spectra show relaxation effects at all temperatures. Spectra taken at 4.2 K in applied fields of about 3 T showed that Vzz is positive and η≅0. The spectra were fitted using a stochastic model of a magnetic hyperfine field relaxing parallel to be z axis, giving relaxation times of 10-9-10-10 s. (orig.)

Additional details

Publishing Information

Journal Title
Hyperfine Interactions
Journal Volume
56
Journal Issue
1-4
Series
Hyperfine Interact.
Journal Page Range
1465-1470
ISSN
0304-3843
CODEN
HYIND

Conference

Title
International conference on the applications of the Moessbauer effect (ICAME '89) and exhibit.
Dates
4-8 Sep 1989.
Place
Budapest (Hungary).

INIS

Country of Publication
Netherlands
Country of Input or Organization
Switzerland
INIS RN
22005919
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Resource subtype / Literary indicator
Conference, Numerical Data
Descriptors DEI
ACETYL RADICALS; CRYSTAL STRUCTURE; EXPERIMENTAL DATA; HYDROXY COMPOUNDS; IRON COMPLEXES; LOW TEMPERATURE; MAGNETIC SUSCEPTIBILITY; MEDIUM TEMPERATURE; MOESSBAUER EFFECT; MOLECULAR STRUCTURE; PERCHLORATES; PROPANE; PYRIDINES; RELAXATION TIME; SCHIFF BASES; SPIN-SPIN RELAXATION; TEMPERATURE DEPENDENCE; ULTRALOW TEMPERATURE; VERY LOW TEMPERATURE; X-RAY DIFFRACTION
Descriptors DEC
ACYL RADICALS; ALKANES; AZINES; CHLORINE COMPOUNDS; COHERENT SCATTERING; COMPLEXES; DATA; DIFFRACTION; HALOGEN COMPOUNDS; HETEROCYCLIC COMPOUNDS; HYDROCARBONS; IMINES; INFORMATION; MAGNETIC PROPERTIES; NUMERICAL DATA; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RADICALS; RELAXATION; SCATTERING; TRANSITION ELEMENT COMPLEXES