Antiferromagnetism in Fe1+y Te and Superconductivity in K (x) Fe2Se2

Cherian, Dona and Elizabeth, Suja (2015) Antiferromagnetism in Fe1+y Te and Superconductivity in K (x) Fe2Se2. In: JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, 28 (3, SI). pp. 1139-1142.

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Abstract

Iron-based layered chalcogenides are interesting because of their structural magnetic and superconducting properties. Single crystals of the parent binary chalcogenides, Fe1+y Te, and intercalated ternary chalcogenides, K0.8Fe2Se2, are grown and investigated in detail. Single crystals are grown by modified horizontal Bridgman method. Fe1+y Te demonstrates an antiferromagnetic (AFM) transition at T (N) =67 K which is identified as a magnetostructural transition. By varying the concentration of excess Fe, we have tuned T (N) over a range of temperature from 67 to 57 K. The superconducting properties of K0.8Fe2Se2 crystals are explored by magnetization measurements. A superconducting transition is observed at T (C) =31 K. The lower critical field of K0.8Fe2Se2 is estimated from field variation of magnetization measurements.

Item Type:	Journal Article
Publication:	JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
Publisher:	SPRINGER
Additional Information:	Copy right for this article belongs to the SPRINGER, 233 SPRING ST, NEW YORK, NY 10013 USA
Keywords:	Fe superconductors; Crystal growth; Antiferromagnetism
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	20 Apr 2015 11:24
Last Modified:	20 Apr 2015 11:24
URI:	http://eprints.iisc.ac.in/id/eprint/51297

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