Among different carbon nanomaterial foam-filled polymer composites, graphene-based foam gives superior specific shielding effectiveness when compared to typical metals.

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.

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