Cooperative formation of high-spin species in a photoexcited spin-crossover complex | Zendy

Yutaka Moritomo | Zendy; Muneaki Kamiya | Zendy; Arao Nakamura | Zendy; Akio Nakamoto | Zendy; Nobuhiko Kojima | Zendy

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Cooperative formation of high-spin species in a photoexcited spin-crossover complex

Author(s) -

Yutaka Moritomo,

Muneaki Kamiya,

Arao Nakamura,

Akio Nakamoto,

Nobuhiko Kojima

Publication year - 2006

Publication title -

physical review b

Language(s) - English

Resource type - Journals

eISSN - 1538-4489

pISSN - 1098-0121

DOI - 10.1103/physrevb.73.012103

Subject(s) - photoexcitation , physics , spin (aerodynamics) , condensed matter physics , excitation , radius , phase transition , spin crossover , ionic radius , atomic physics , excited state , ion , thermodynamics , quantum mechanics , computer science , computer security

The dynamics of the photoinduced phase transition was investigated in a prototypical spin crossover complex, [Fe(ptz)6](BF4)2 (ptz=1-propyltetrazole), under photoexcitation at 77 K near the transition temperature (Tc=130 K). When the excitation power I exceeds [approximate]1 mW/mm2, we observed an "acceleration" of the creation rate of the density nHS of the high-spin (HS) species after a characteristic incubation period. The "acceleration" is interpreted in terms of the negative pressure effect; the photocreated HS species with a larger ionic radius expands the volume to cause the structural phase transition

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