Pressure-Induced Magnetic Order in Golden SmS

A. Barla, J. P. Sanchez, Y. Haga, G. Lapertot, B. P. Doyle, O. Leupold, R. Rüffer, M. M. Abd-Elmeguid, R. Lengsdorf, and J. Flouquet
Phys. Rev. Lett. 92, 066401 – Published 13 February 2004

Abstract

High pressure Sm149 nuclear forward scattering experiments have been performed on the nonmagnetic semiconductor SmS. We present the first clear evidence that the closure of the insulating gap at pΔ2GPa coincides with the appearance of magnetic order. The pressure-induced magnetic phase transition has some first order character and suggests that the Sm ions are nearly trivalent at pΔ. A Γ8 quartet crystal field ground state with a value of 0.5μB for the samarium magnetic moment is inferred from our results. Considerable magnetic short range order is observed above the ordering temperature inferred from macroscopic measurements.

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  • Received 27 September 2003

DOI:https://doi.org/10.1103/PhysRevLett.92.066401

©2004 American Physical Society

Authors & Affiliations

A. Barla1, J. P. Sanchez2, Y. Haga2,3, G. Lapertot2, B. P. Doyle1,*, O. Leupold1, R. Rüffer1, M. M. Abd-Elmeguid4, R. Lengsdorf4, and J. Flouquet2

  • 1European Synchrotron Radiation Facility, B.P. 220, F-38043 Grenoble Cedex 9, France
  • 2Département de Recherche Fondamentale sur la Matière Condensée, CEA Grenoble, 17 rue des Martyrs, F-38054 Grenoble Cedex 9, France
  • 3Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan
  • 4II. Physikalisches Institut, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany

  • *Now at INFM, TASC Laboratory, S.S. 14 Km 163.5,I-34012 Trieste, Italy.

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Issue

Vol. 92, Iss. 6 — 13 February 2004

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