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Electronic Structure of Iron Substituted Lithium Intercalated TaS2

Published online by Cambridge University Press:  15 February 2011

M. Eibschütz ,
D. W. Murphy  and
F. J. DiSalvo
M. Eibschütz
Affiliation:
Bell Laboratories, Murray Hill, New Jersey 07974
D. W. Murphy
Affiliation:
Bell Laboratories, Murray Hill, New Jersey 07974
F. J. DiSalvo
Affiliation:
Bell Laboratories, Murray Hill, New Jersey 07974
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Abstract

We have used the 57Fe Mössbauer effect to study the electronic spin configuration of Fe substituted in the layer compound LixTal-yFeyS2(0≤x≤l;0≤y≤0.1). The Mössbauer effect results show that the Fe is localized and in Fe2+ valence state but the electronic configuration depends on the lithium concentration. At room temperature the isomer shift of Fe2+ increases from 0.56 mm/s for x = 0 (no Li) to 0.77 mm/s for x = .86 (at y = 0.05). The isomer shift results reflect the changes in the electronic configuration of the host from Ta4+(5d1) to Ta3+(5d2) and an increase in ionicity as the lithium content increases from 0 to 1.

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References

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