Static and dynamic magnetic properties of an [Fe13] cluster
ROSA, Patrick
Laboratorio di Magnetismo Molecolare [INSTM]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
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Laboratorio di Magnetismo Molecolare [INSTM]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
ROSA, Patrick
Laboratorio di Magnetismo Molecolare [INSTM]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
< Reduce
Laboratorio di Magnetismo Molecolare [INSTM]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Language
en
Article de revue
This item was published in
Physical Review B: Condensed Matter and Materials Physics (1998-2015). 2006, vol. 73, n° 1, p. 014422 (9 p.)
American Physical Society
English Abstract
The static and dynamic magnetic properties of an [Fe13] cluster were investigated using several experimental techniques. The cluster crystallizes in a cubic space group, but careful investigation of the crystallographic ...Read more >
The static and dynamic magnetic properties of an [Fe13] cluster were investigated using several experimental techniques. The cluster crystallizes in a cubic space group, but careful investigation of the crystallographic data revealed that the symmetry is distorted locally. dc magnetic susceptibility measurements showed the presence of competing antiferromagnetic isotropic exchange interactions leading to a high-spin ground state and many low-lying excited spin states, which was confirmed by inelastic neutron scattering measurements. From high-field electron paramagnetic resonance measurements a small zero-field splitting of the spin ground state was inferred, which supports the local symmetry distortion found in the crystallographic studies. The spin dynamics slows down at sub-kelvin temperatures, where ac susceptibility measurements indicated that part of the sample shows superparamagnetic-like behavior and the other part relaxes through magnetization tunneling. The Mössbauer data confirmed the slowing down of the spin dynamics, indicating that this occurs mainly in the peripheral spins.Read less <
English Keywords
Molecular magnets
Dynamic properties
Electron paramagnetic resonance
Relaxation
Moüssbauer effect or Other g-ray spectroscopy
Origin
Hal imported