Dynamic Low-Spin—High-Spin Transition of ${Fe}^{2 +}$ in $1 T - {Fe}_{x} {Ta}_{1 - x} S_{2} (x <~ \frac{1}{3})$

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12 January 1976

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 36 (2) , 104-107
https://doi.org/10.1103/physrevlett.36.104

Abstract

1 T - {Fe}_{x} {Ta}_{1 - x} S_{2}

shows unusual behavior in the temperature dependence of the magnetic susceptibility and

{}^{57}{Fe}

Mössbauer isomer shift, as a result of a low spin (

{}^{1}A_{1 g}

) to high spin (

{}^{5}T_{2 g}

) transition of

{Fe}^{2 +}

. The fluctuation rate

{}^{1}A_{1 g} \leftrightarrow {}^{5}T_{2 g}

is faster than

10^{7}

\sec^{- 1}

.

Keywords

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