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Influence of hydrostatic pressure on the bulk magnetic properties of Eu2Ir2O7

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Prando G., Dally R., Schottenhamel W., Guguchia Z., Baek S. -H., Aeschlimann R., Wolter A. U. B., Wilson S. D., Buechner B., Graf M. J.,
Project Interplay between the superconductivity and magnetism in cuprate and Fe-based superconductors
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Original article (peer-reviewed)

Journal PHYSICAL REVIEW B
Volume (Issue) 93(10)
Page(s) 104422
Title of proceedings PHYSICAL REVIEW B
DOI 10.1103/physrevb.93.104422

Abstract

We report on the magnetic properties of Eu2Ir2O7 upon the application of hydrostatic pressure P by means of macroscopic and local-probe techniques. In contrast to previously reported resistivity measurements, our dc magnetization data unambiguously demonstrate a nonmonotonic dependence of T-N, i.e., the critical transition temperature to the magnetic phase, on P. Strikingly, the recently calculated behavior for T-N closely reproduces our results under the assumption that P lowers the U/W ratio (i.e., Coulomb repulsion energy over electronic bandwidth). Zero-field muon-spin spectroscopy measurements confirm that the Ir4+ magnetic moment and/or the local magnetic configuration are only weakly perturbed by low P values. Accordingly, our current experimental findings strongly support the preservation of a 4-in/4-out ground state across the accessed region of the phase diagram.
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