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- W2044446966 abstract "The dynamics of the photoinduced phase transition (PIPT) has been investigated for the Co-Fe cyanides film, ${mathrm{Na}}_{0.6}{mathrm{Co}}_{1.3}[mathrm{Fe}{(mathrm{CN})}_{6}]∙4{mathrm{H}}_{2}mathrm{O}$, by means of the transient absorption spectroscopy. At low temperatures $(ensuremath{lesssim}150phantom{rule{0.3em}{0ex}}mathrm{K})$, the compound shows the permanent PIPT from the low-spin phase [LS phase: LS ${mathrm{Co}}^{3+}$ $({t}_{2mathrm{g}ensuremath{uparrow}}^{3}{t}_{2mathrm{g}ensuremath{downarrow}}^{3})--mathrm{LS}$ ${mathrm{Fe}}^{2+}$ $({t}_{2mathrm{g}ensuremath{uparrow}}^{3}{t}_{2mathrm{g}ensuremath{downarrow}}^{3})$] to the high-spin phase [HS phase; HS ${mathrm{Co}}^{2+}$ $({t}_{2mathrm{g}ensuremath{uparrow}}^{3}{t}_{2mathrm{g}ensuremath{downarrow}}^{2}{e}_{mathrm{g}ensuremath{uparrow}}^{2})--mathrm{LS}$ ${mathrm{Fe}}^{3+}$ $({t}_{2mathrm{g}ensuremath{uparrow}}^{3}{t}_{2mathrm{g}ensuremath{downarrow}}^{2})$]. We have found that the film shows the transient PIPT into the HS phase above $ensuremath{sim}170phantom{rule{0.3em}{0ex}}mathrm{K}$, and the lifetime ${ensuremath{tau}}_{mathrm{PI}}$ of the photoinduced phase exponentially decreased from $10phantom{rule{0.3em}{0ex}}mathrm{ms}$ at $170phantom{rule{0.3em}{0ex}}mathrm{K}$ to $ensuremath{sim}100phantom{rule{0.3em}{0ex}}ensuremath{mu}mathrm{s}$ at $260phantom{rule{0.3em}{0ex}}mathrm{K}$. In the early stage $(ensuremath{Delta}tensuremath{leqslant}200phantom{rule{0.3em}{0ex}}mathrm{ns})$ of the PIPT, we further have observed a characteristic photoinduced absorption band ($Y$ band) and ascribed the band to the LS ${mathrm{Co}}^{2+}$ $({t}_{2mathrm{g}ensuremath{uparrow}}^{3}{t}_{2mathrm{g}ensuremath{downarrow}}^{3}{e}_{mathrm{g}ensuremath{uparrow}}^{1})$ state." @default.
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- W2044446966 date "2005-12-14" @default.
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- W2044446966 title "Spectroscopic investigation of the dynamical behavior of the photoinduced phase transition ofNa0.6Co1.3[Fe(CN)6]∙4H2O" @default.
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- W2044446966 doi "https://doi.org/10.1103/physrevb.72.214425" @default.
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