Centers and Institutes
Published December 19, 2023 | Version v1
Journal article Open

Strong enhancement of magnetic ordering temperature and structural/valence transitions in EuPd3S4 under high pressure

Creators

  • 1. Iowa State University
  • 2. McGill University
  • 3. University of Chicago
  • 4. University of Alabama at Birmingham
  • 5. Michigan State University
  • 6. Argonne National Laboratory

Description

We present a comprehensive study of the inhomogeneous mixed-valence compound, EuPd3S4, by electrical transport, X-ray diffraction, time-domain 151Eu synchrotron Mössbauer spectroscopy, and X-ray absorption spectroscopy measurements under high pressure. Electrical transport measurements show that the antiferromagnetic ordering temperature, TN, increases rapidly from 2.8 K at ambient pressure to 23.5 K at ~19 GPa and plateaus between ~19 and ~29 GPa after which no anomaly associated with TN is detected. A pressure-induced first-order structural transition from cubic to tetragonal is observed, with a rather broad coexistence region (~20 GPa to ~30 GPa) that corresponds to the TN plateau. Mössbauer spectroscopy measurements show a clear valence transition from approximately 50:50 Eu2+:Eu3+ to fully Eu3+ at ~28 GPa, consistent with the vanishing of the magnetic order at the same pressure. X-ray absorption data show a transition to a fully trivalent state at a similar pressure. Our results show that pressure first greatly enhances TN, most likely via enhanced hybridization between the Eu 4f states and the conduction band, and then, second, causes a structural phase transition that coincides with the conversion of the europium to a fully trivalent state.

Data availability

All study data are included in the article and/or SI Appendix.

Files

huyan-et-al-2023-strong-enhancement-of-magnetic-ordering-temperature-and-structural-valence-transitions-in-eupd3s4.pdf

Files (5.9 MB)

Additional details

Identifiers

DOI
10.1073/pnas.2310779120
Other
oai:uchicago.tind.io:10418

Funding

US Department of Energy
DE-AC02-07CH11358
Center for Advancement of Topological Semimetals
Fonds Québécois de la Recherche sur la Nature et les Technologies and the Natural Sciences and Engineering Research Council Canada
US Department of Energy
DE-AC-02-06CH11357
National Science Foundation
EAR-1634415
US Department of Energy
DE-AC02-06CH11357
COMPRES
EAR-1606856
HPCAT
National Science Foundation
CAREER award
US Department of Energy
DE-SC0023648

UChicago Information

Division(s)
Institutes & Centers
Center(s) or Institute(s)
Center for Advanced Radiation Sources