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Title: Evidence for a low-temperature magnetic ground state in double-perovskite iridates with I r 5 + ( 5 d 4 ) ions

Abstract

Here, we report an unusual magnetic ground state in single-crystal, double-perovskite Ba 2YIrO 6 and Sr-doped Ba 2YIrO 6 with Ir 5+ (5d 4) ions. Long-range magnetic order below 1.7 K is confirmed by dc magnetization, ac magnetic susceptibility, and heat-capacity measurements. The observed magnetic order is extraordinarily delicate and cannot be explained in terms of either a low-spin S=1 state, or a singlet J eff=0 state imposed by the spin-orbit interactions (SOI). Alternatively, the magnetic ground state appears consistent with a SOI that competes with comparable Hund's rule coupling and inherently large electron hopping, which cannot stabilize the singlet J eff=0 ground state. However, this picture is controversial, and conflicting magnetic behavior for these materials is reported in both experimental and theoretical studies, which highlights the intricate interplay of interactions that determine the ground state of materials with strong SOI.

Authors:
 [1];  [1]; ORCiD logo [2];  [1];  [3];  [4];  [4];  [1]
  1. Univ. of Colorado, Boulder, CO (United States). Dept. of Physics
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division; Univ. of Kentucky, Lexington, KY (United States). Dept. of Physics and Astronomy and Center for Advanced Materials
  3. Florida State Univ., Tallahassee, FL (United States). Dept. of Physics
  4. Univ. of Kentucky, Lexington, KY (United States). Dept. of Physics and Astronomy and Center for Advanced Materials
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
OSTI Identifier:
1471893
Alternate Identifier(s):
OSTI ID: 1377642
Grant/Contract Number:  
AC05-00OR22725; FG02-98ER45707; DMR-1265162; DMR-1712101; DMR- 1506979
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 96; Journal Issue: 6; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE

Citation Formats

Terzic, Jasminka, Zheng, Hao, Ye, Feng, Zhao, H. D., Schlottmann, P., De Long, L. E., Yuan, S. J., and Cao, Gang. Evidence for a low-temperature magnetic ground state in double-perovskite iridates with Ir5+(5d4) ions. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.96.064436.
Terzic, Jasminka, Zheng, Hao, Ye, Feng, Zhao, H. D., Schlottmann, P., De Long, L. E., Yuan, S. J., & Cao, Gang. Evidence for a low-temperature magnetic ground state in double-perovskite iridates with Ir5+(5d4) ions. United States. doi:10.1103/PhysRevB.96.064436.
Terzic, Jasminka, Zheng, Hao, Ye, Feng, Zhao, H. D., Schlottmann, P., De Long, L. E., Yuan, S. J., and Cao, Gang. Tue . "Evidence for a low-temperature magnetic ground state in double-perovskite iridates with Ir5+(5d4) ions". United States. doi:10.1103/PhysRevB.96.064436. https://www.osti.gov/servlets/purl/1471893.
@article{osti_1471893,
title = {Evidence for a low-temperature magnetic ground state in double-perovskite iridates with Ir5+(5d4) ions},
author = {Terzic, Jasminka and Zheng, Hao and Ye, Feng and Zhao, H. D. and Schlottmann, P. and De Long, L. E. and Yuan, S. J. and Cao, Gang},
abstractNote = {Here, we report an unusual magnetic ground state in single-crystal, double-perovskite Ba2YIrO6 and Sr-doped Ba2YIrO6 with Ir5+ (5d4) ions. Long-range magnetic order below 1.7 K is confirmed by dc magnetization, ac magnetic susceptibility, and heat-capacity measurements. The observed magnetic order is extraordinarily delicate and cannot be explained in terms of either a low-spin S=1 state, or a singlet Jeff=0 state imposed by the spin-orbit interactions (SOI). Alternatively, the magnetic ground state appears consistent with a SOI that competes with comparable Hund's rule coupling and inherently large electron hopping, which cannot stabilize the singlet Jeff=0 ground state. However, this picture is controversial, and conflicting magnetic behavior for these materials is reported in both experimental and theoretical studies, which highlights the intricate interplay of interactions that determine the ground state of materials with strong SOI.},
doi = {10.1103/PhysRevB.96.064436},
journal = {Physical Review B},
number = 6,
volume = 96,
place = {United States},
year = {Tue Aug 29 00:00:00 EDT 2017},
month = {Tue Aug 29 00:00:00 EDT 2017}
}

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Works referenced in this record:

A short history of SHELX
journal, December 2007

  • Sheldrick, George M.
  • Acta Crystallographica Section A Foundations of Crystallography, Vol. 64, Issue 1, p. 112-122
  • DOI: 10.1107/S0108767307043930