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Phys. Rev. Lett. 84, 3181–3184 (2000)

Dynamical Aspects of the Photoinduced Phase Transition in Spin-Crossover Complexes

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Y. Ogawa1,2, S. Koshihara1,2, K. Koshino3,4, T. Ogawa3,5, C. Urano6, and H. Takagi6
1Department of Condensed Matter Physics, Tokyo Institute of Technology, Oh-okayama, Meguro-ku, Tokyo 152-8551, Japan
2Kanagawa Academy of Science and Technology (KAST), Sakado, Takatsu-ku, Kawasaki 213-0012, Japan
3Department of Physics, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
4Institute of Physics, University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8902, Japan
5“Structure and Transformation,” PRESTO, Japan Science and Technology Corporation (JST), Sendai, 980-8578, Japan
6School of Frontier Science and Institute for Solid State Physics, University of Tokyo, Hongo, Tokyo 113-0033, Japan

Received 14 July 1999; published in the issue dated 3 April 2000

We report a dynamical study on the photoinduced cooperative changes of the spin configurations in single crystals of the organometal spin-crossover complex. In the photoswitching process between low- and high-spin states, nonlinear characteristics such as thresholdlike behavior, incubation period, and phase separation have been observed. These results demonstrate that the cooperative intersystem crossing mediated by spin-lattice interaction plays a key role in the driving process of a new class of nonequilibrium phenomena so called photoinduced phase transition.

© 2000 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.84.3181
DOI:
10.1103/PhysRevLett.84.3181
PACS:
78.90.+t, 75.90.+w, 78.20.Bh
 
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