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Magnetic phase diagram of Fe1.1Te1-xSex: A comparative study with the stoichiometric superconducting FeTe1-xSex system

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arxiv 0907.3513 v2 pith:6KFWFYFW submitted 2009-07-20 cond-mat.supr-con cond-mat.str-el

Magnetic phase diagram of Fe1.1Te1-xSex: A comparative study with the stoichiometric superconducting FeTe1-xSex system

P. L. Paulose , C. S. Yadav , K. M. Subhedar This is my paper
classification cond-mat.supr-con cond-mat.str-el
keywords magneticte1-xsexseriescomparativediagramelectronicfete1-xsexmoessbauer
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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 Moessbauer 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 Moessbauer spectroscopy clearly brings out the electronic differences in these two series.

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