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Growth and superconductivity of FeSex crystals

Appl. Phys. Lett. 94, 082508 (2009); doi:10.1063/1.3093838

Published 25 February 2009

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U. Patel,1 J. Hua,1 S. H. Yu,1 S. Avci,1 Z. L. Xiao,1 H. Claus,2 J. Schlueter,2 V. V. Vlasko-Vlasov,2 U. Welp,2 and W. K. Kwok2
1Department of Physics, Northern Illinois University, DeKalb, Illinois 60115, USA
2Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
Iron selenide (FeSex) crystals with lateral dimensions up to millimeters were grown via a vapor self-transport method. The crystals consist of the dominant alpha-phase with trace amounts of beta-phase as identified by powder x-ray diffraction. With four-probe resistance measurements, we obtained a zero resistance critical temperature of 7.5 K and a superconducting onset transition temperature of up to 11.8 K in zero magnetic field as well as an anisotropy of 1.5±0.1 for the critical field. Magnetization measurements on individual crystals reveal the coexistence of superconductivity and ferromagnetism. ©2009 American Institute of Physics
History: Received 13 January 2009; accepted 11 February 2009; published 25 February 2009
Permalink: http://link.aip.org/link/?APPLAB/94/082508/1
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KEYWORDS and PACS

Keywords
PACS
  • 81.10.Bk
    Crystal growth from vapor
  • 74.10.+v
    Occurrence of superconductivity
  • 74.62.-c
    Transition temperature variations (superconductivity)
  • 74.25.Op
    Mixed state, critical fields, and surface sheath
  • 75.30.Gw
    Magnetic anisotropy
  • 74.25.Ha
    Magnetic properties of superconductors
  • 74.70.Ad
    Superconducting metals, alloys and binary compounds
  • YEAR: 2009

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
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