Mössbauer spectroscopy of 57Fe in semimagnetic semiconducting Hg1-xFexSe

I. Nowik; E. R. Bauminger; A. Mycielski; H. Szymczak

doi:10.1016/0921-4526(88)90049-X

Mössbauer spectroscopy of ⁵⁷Fe in semimagnetic semiconducting Hg_1-xFe_xSe

I. Nowik^*, E. R. Bauminger, A. Mycielski, H. Szymczak

^*Corresponding author for this work

Racah Institute of Physics

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Abstract

Mössbauer spectroscopy studies of ⁵⁷Fe in Hg_1-xFe_xSe, x=0.002, 0.007 and 0.015, at temperatures between 4.2 and 300 K have been performed. The spectra consist of two absorption lines. The separation between the lines, their shapes and widths are strongly temperature-dependent. The separation between the lines can be interpreted as quadrupole splittings due to static axial distortions which split the Fe²⁺ ground cubic orbital doublet into two singlets separated by 46 K. Yet, this interpretation is not completely consistent with changes in shape and line widths. Those are characteristic features of the dynamic Jahn-Teller effect. In the 0.2% and 0.7% samples a Fe³⁺ subspectrum, corresponding to (6±1) x 10¹⁸ cm^-3 Fe³⁺, could be observed.

Original language	English
Pages (from-to)	215-219
Number of pages	5
Journal	Physica B: Condensed Matter
Volume	153
Issue number	1-3
DOIs	https://doi.org/10.1016/0921-4526(88)90049-X
State	Published - Oct 1988

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title = "M{\"o}ssbauer spectroscopy of 57Fe in semimagnetic semiconducting Hg1-xFexSe",

abstract = "M{\"o}ssbauer spectroscopy studies of 57Fe in Hg1-xFexSe, x=0.002, 0.007 and 0.015, at temperatures between 4.2 and 300 K have been performed. The spectra consist of two absorption lines. The separation between the lines, their shapes and widths are strongly temperature-dependent. The separation between the lines can be interpreted as quadrupole splittings due to static axial distortions which split the Fe2+ ground cubic orbital doublet into two singlets separated by 46 K. Yet, this interpretation is not completely consistent with changes in shape and line widths. Those are characteristic features of the dynamic Jahn-Teller effect. In the 0.2% and 0.7% samples a Fe3+ subspectrum, corresponding to (6±1) x 1018 cm-3 Fe3+, could be observed.",

author = "I. Nowik and Bauminger, {E. R.} and A. Mycielski and H. Szymczak",

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T1 - Mössbauer spectroscopy of 57Fe in semimagnetic semiconducting Hg1-xFexSe

AU - Nowik, I.

AU - Bauminger, E. R.

AU - Mycielski, A.

AU - Szymczak, H.

PY - 1988/10

Y1 - 1988/10

N2 - Mössbauer spectroscopy studies of 57Fe in Hg1-xFexSe, x=0.002, 0.007 and 0.015, at temperatures between 4.2 and 300 K have been performed. The spectra consist of two absorption lines. The separation between the lines, their shapes and widths are strongly temperature-dependent. The separation between the lines can be interpreted as quadrupole splittings due to static axial distortions which split the Fe2+ ground cubic orbital doublet into two singlets separated by 46 K. Yet, this interpretation is not completely consistent with changes in shape and line widths. Those are characteristic features of the dynamic Jahn-Teller effect. In the 0.2% and 0.7% samples a Fe3+ subspectrum, corresponding to (6±1) x 1018 cm-3 Fe3+, could be observed.

AB - Mössbauer spectroscopy studies of 57Fe in Hg1-xFexSe, x=0.002, 0.007 and 0.015, at temperatures between 4.2 and 300 K have been performed. The spectra consist of two absorption lines. The separation between the lines, their shapes and widths are strongly temperature-dependent. The separation between the lines can be interpreted as quadrupole splittings due to static axial distortions which split the Fe2+ ground cubic orbital doublet into two singlets separated by 46 K. Yet, this interpretation is not completely consistent with changes in shape and line widths. Those are characteristic features of the dynamic Jahn-Teller effect. In the 0.2% and 0.7% samples a Fe3+ subspectrum, corresponding to (6±1) x 1018 cm-3 Fe3+, could be observed.

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Mössbauer spectroscopy of ⁵⁷Fe in semimagnetic semiconducting Hg_1-xFe_xSe

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