Magnetism in some layer molecular magnets as revealed by Mössbauer spectroscopy
Abstract
57Fe Mössbauer spectroscopy was used to explore magnetic properties of two 2D molecular ferrimagnets. In NPn4[FeIIFeIII(ox)3] (Pn = n-C5H11, (ox) =(C2O4)2-), the previously reported negative magnetization is shown here by external field studies to be due to a cross-over between FeIII and FeII- magnetizations. The form and parameters of the magnetic Hamiltonian describing the temperature dependence of both the FeIII hf-field and net magnetizations has been determined. In NBu4[MnIIFeIII(ox)3] (Bu = n-C4H9) soft XY-magnet the low temperature relaxation spectra are interpreted in terms of slowly varying classical magnetization-evolution at low temperature.
- Publication:
-
Hyperfine Interactions
- Pub Date:
- July 2000
- DOI:
- 10.1023/A:1012657115015
- Bibcode:
- 2000HyInt.126..149B