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Temporal decoupling of spin and crystallographic phase transitions in Fe(ptz)_6(BF_4)_2

机译:Fe(ptz)_6(BF_4)_2中自旋和晶体相变的时间解耦

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摘要

We have studied relaxation dynamics of the thermally and photoinduced metastable states in [Fe(ptz)_6](BF_4)_2 near the spin transition temperature using magnetic-susceptibility measurements and optical-absorption spectroscopy as function of the time. We observed two-step relaxations from the photoinduced high-spin to the ground low-spin state. The time-resolved measurements of the spin-relaxation processes allow us to decouple the spin transition and the crystallographic phase transition and evaluate their intrinsic transition temperatures as 122 and 132 K, respectively.
机译:我们使用磁化率测量和光吸收光谱法研究了自旋转变温度附近[Fe(ptz)_6](BF_4)_2中热和光诱导的亚稳态的弛豫动力学。我们观察到了从光诱导高自旋态到基态低自旋态的两步弛豫。自旋弛豫过程的时间分辨测量值使我们能够解耦自旋跃迁和晶体学相变,并将它们的固有转变温度分别评估为122 K和132K。

著录项

  • 来源
    《Physical review》 |2009年第18期|180405.1-180405.4|共4页
  • 作者单位

    Department of Physics, Graduate School of Science, Kvoto University, Sakyo-ku, Kyoto 606-8502, Japan;

    Institute for Integrated Cell-Material Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan;

    UPS, INPT, LCC, Universite de Toulouse, F-31077 Toulouse, France Laboratoire de Chimie de Coordination, CNRS, 205 Route de Narbonne, 31077 Toulouse, France;

    UPS, INPT, LCC, Universite de Toulouse, F-31077 Toulouse, France Laboratoire de Chimie de Coordination, CNRS, 205 Route de Narbonne, 31077 Toulouse, France;

    Department of Physics, Graduate School of Science, Kvoto University, Sakyo-ku, Kyoto 606-8502, Japan Institute for Integrated Cell-Material Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    spin crossover; general studies of phase transitions;

    机译:旋转分频器相变的一般研究;

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