Coexistence of Magnetism and Superconductivity in the Iron-Based Compound Cs0.8(FeSe0.98)2

Z. Shermadini, A. Krzton-Maziopa, M. Bendele, R. Khasanov, H. Luetkens, K. Conder, E. Pomjakushina, S. Weyeneth, V. Pomjakushin, O. Bossen, and A. Amato
Phys. Rev. Lett. 106, 117602 – Published 16 March 2011

Abstract

We report on muon-spin rotation and relaxation (μSR), electrical resistivity, magnetization and differential scanning calorimetry measurements performed on a high-quality single crystal of Cs0.8(FeSe0.98)2. Whereas our transport and magnetization data confirm the bulk character of the superconducting state below Tc=29.6(2)K, the μSR data indicate that the system is magnetic below TN=478.5(3)K, where a first-order transition occurs. The first-order character of the magnetic transition is confirmed by differential scanning calorimetry data. Taken all together, these data indicate in Cs0.8(FeSe0.98)2 a microscopic coexistence between the superconducting phase and a strong magnetic phase. The observed TN is the highest reported to date for a magnetic superconductor.

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  • Received 10 January 2011

DOI:https://doi.org/10.1103/PhysRevLett.106.117602

© 2011 American Physical Society

Authors & Affiliations

Z. Shermadini1, A. Krzton-Maziopa2, M. Bendele1,3, R. Khasanov1, H. Luetkens1, K. Conder2, E. Pomjakushina2, S. Weyeneth3, V. Pomjakushin4, O. Bossen3, and A. Amato1,*

  • 1Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
  • 2Laboratory for Developments and Methods, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
  • 3Physik-Institut der Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
  • 4Laboratory for Neutron Scattering, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland

  • *Corresponding author. alex.amato@psi.ch

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Vol. 106, Iss. 11 — 18 March 2011

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