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An exploration of some magnetic fundamentals in EuSe using muSR

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Terry I., Adams P. W., Bykovetz N., Giblin S. R., Guguchia Z., Khasanov R., Klein J., Lin C. L., Liu T. J.,
Project Interplay between the superconductivity and magnetism in cuprate and Fe-based superconductors
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Original article (peer-reviewed)

Journal AIP ADVANCES
Volume (Issue) 6(5)
Page(s) 055705
Title of proceedings AIP ADVANCES
DOI 10.1063/1.4943235

Abstract

EuSe is a simple magnetic system that appears to show many complicated features. Under applied pressure it undergoes a transition from an antiferromagnet (AF) to a ferromagnet (FM). This transition provides a means of testing certain basic fundamentals of magnetic theory and an opportunity to explore the complexities of EuSe. Using the muon-spin rotation and relaxation technique (mu SR), EuSe was measured at pressures ranging from ambient to 11 kbar. In ambient-pressure EuSe, muon data reveal two local fields, but show only a single field in the FM state formed under pressure. The mu SR measurements appear to show a continuous transition at Tc, contrary to previous Mossbauer results that were interpreted as being evidence of a first-order transition. Values determined for the critical exponent, beta, in AF and FM EuSe, differ and therefore appear to be a clear counterexample to the Universality Hypothesis. The values of beta also are indicative of EuSe's being a 2D magnet for pressures up to 11 kbar. The nature and values of the local fields seen by the muons is discussed and analyzed. (C) 2016 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
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