Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

3-1-2011

Journal or Book Title

Physical Review B

Volume

83

Issue

10

First Page

104526

DOI

10.1103/PhysRevB.83.104526

Abstract

The magnetic ordering of superconducting single crystals of K0.80Fe1.76Se2.00 has been studied between 10 and 550 K using 57Fe Mössbauer spectroscopy. Despite being superconducting below Tsc~30 K, the iron sublattice in K0.80Fe1.76Se2.00 clearly exhibits magnetic order from well below Tsc to its Néel temperature of TN=532±2 K. The iron moments are ordered almost parallel to the crystal c axis. The order collapses rapidly above 500 K and the accompanying growth of a paramagnetic component suggests that the magnetic transition may be first order, which may explain the unusual temperature dependence reported in recent neutron diffraction studies.

Comments

This article is published as Ryan, D. H., W. N. Rowan-Weetaluktuk, J. M. Cadogan, R. Hu, W. E. Straszheim, S. L. Bud’ko, and P. C. Canfield. "57 Fe Mössbauer study of magnetic ordering in superconducting K0.80Fe1.76Se2.00 single crystals." Physical Review B 83, no. 10 (2011): 104526. DOI: 10.1103/PhysRevB.83.104526. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

Share

COinS