Volume 90, Number 2, April 2010
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||20 May 2010|
Magnetic phase diagram of Fe1.1Te1-xSex: A comparative study with the stoichiometric superconducting FeTe1-xSex system
Department of Condensed Matter Physics and Material Science, Tata Institute of Fundamental Research Mumbai 400005, India
Corresponding author: firstname.lastname@example.org
Accepted: 19 April 2010
We report a comparative study of the series Fe1.1Te1-xSex and the stoichiometric FeTe1-xSex to bring out the difference in their magnetic, superconducting and electronic properties. The Fe1.1Te1-xSex series is found to be magnetic and its microscopic properties are elucidated through Mössbauer spectroscopy. The magnetic phase diagram of Fe1.1Te1-xSex is traced out and it shows the emergence of spin-glass state when the antiferromagnetic state is destabilized by the Se substitution. The isomer shift and quadrupolar splitting obtained from the Mössbauer spectroscopy clearly brings out the electronic differences in these two series.
PACS: 74.70.-b – Superconducting materials other than cuprates / 74.25.F- – Transport properties / 74.25.Ha – Magnetic properties including vortex structures and related phenomena
© EPLA, 2010
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