Relaxation in the 3D ordered CoTAC spin chain by quantum nucleation of 0D domain walls

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dc.creatorLhotel, E.
dc.creatorKhatsko, E. N.
dc.creatorPaulsen, C.
dc.date2009-04-20
dc.date.accessioned2026-07-07T13:05:56Z
dc.date.available2026-07-07T13:05:56Z
dc.descriptionWe have shown that resonant quantum tunnelling of the magnetisation (QTM), until now observed only in 0D cluster systems (SMMs), occurs in the molecular Ising spin chain, CoTAC ([(CH_3)_3NH]CoCl_3 - 2H_2O) which orders as a canted 3D-antiferromagnet at T_C=4.15 K. This effect was observed around a resonant like field value of 1025 Oe. We present here measurements of the relaxation of the magnetisation as a function of time, from the zero field cooled (ZFC) antiferromagnet state and from the saturated ferromagnet state. We show that, at the resonant field, the relaxation from the saturated state occurs in a complicated process, whereas, surprisingly, in the case of the ZFC state, the relaxation is exponential.
dc.description4 pages, 5 figures, LT25 proceedings
dc.identifierhttps://arxiv.org/abs/0904.2984
dc.identifierhttp://arxiv.org/abs/0904.2984
dc.identifierJPCS 150 (2009) 042111
dc.identifierdoi:10.1088/1742-6596/150/4/042111
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/227651
dc.subjectMaterials Science
dc.subjectMesoscale and Nanoscale Physics
dc.titleRelaxation in the 3D ordered CoTAC spin chain by quantum nucleation of 0D domain walls
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