BLUNDELL, Stephen J.; PRATT, Francis L.; STEER, C. A.; MARSHALL, Ishbel M.; LÉTARD, Jean-François

doi:10.1016/j.jpcs.2003.08.017

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BLUNDELL, Stephen J.
Clarendon Laboratory

PRATT, Francis L.
ISIS Neutron and Muon Source [ISIS]

STEER, C. A.
Clarendon Laboratory

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Journal of Physics and Chemistry of Solids. 2004, vol. 65, n° 1, p. 25-28

Elsevier

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The spin-crossover phenomenon is a cooperative low-spin to high-spin transition which can be initiated using temperature or light-irradiation. We have used muon-spin relaxation (μSR) to study this effect in Fe(PM-PEA)2(NCS)2 and Fe(PMAzA)2(NCS)2. We find Gaussian or exponential muon relaxation in the high-spin phase for the two compounds, reflecting differences in their intermolecular interactions. For both compounds, the low-spin phase gives rise to root-exponential relaxation which we associate with a dilute distribution of fluctuating moments resulting from incomplete spin crossover.< Leer menos

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Spin

High spin

Light irradiation

Chemical compounds

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A μSR study of the spin-crossover

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