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

被引：21

作者：

Moritomo, Y ^{[1
]}

Kamiya, M

Nakamura, A

Nakamoto, A

Kojima, N

机构：

[1] Univ Tsukuba, Dept Phys, Tsukuba, Ibaraki 3058571, Japan

[2] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 4648603, Japan

[3] Univ Tokyo, Grad Sch Arts & Sci, Tokyo 1588902, Japan

来源：

PHYSICAL REVIEW B | 2006年 / 73卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.73.012103

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 (T-c=130 K). When the excitation power I exceeds approximate to 1 mW/mm(2), we observed an "acceleration" of the creation rate of the density n(HS) 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.

引用

页数：4

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