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Title: Origin of magnetic excitation gap in double perovskite Sr 2 FeOsO 6

Abstract

Sr 2FeOsO 6 is an insulating double perovskite compound which undergoes antiferromagnetic transitions at 140 ( T N1) and 67 K ( T N2). To study the underlying electronic and magnetic interactions giving rise to this behavior we have performed inelastic neutron scattering (INS) and resonant inelastic x-ray scattering (RIXS) experiments on polycrystalline samples of Sr 2FeOsO 6. The INS data reveal that the spectrum of spin excitations remains ungapped below T N1, however below T N2 a gap of 6.8 meV develops. The RIXS data reveals splitting of the T 2g multiplet consistent with that seen in other 5d 3 osmium based double perovskites. Altogether these results suggest that spin-orbit coupling is important for ground state selection in 3d–5d 3 double perovskite materials.

Authors:
 [1];  [2];  [1];  [1];  [3];  [1];  [1];  [1];  [4];  [5];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. The Ohio State Univ., Columbus, OH (United States); Leibniz Institute for Solid State and Materials Research Dresden IFW, Dresden (Germany)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Univ. of Toronto, Toronto, ON (Canada); Canadian Institute for Advanced Research, Toronto, ON (Canada)
  5. The Ohio State Univ., Columbus, OH (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
Alexander von Humboldt Foundation; National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1489595
Alternate Identifier(s):
OSTI ID: 1485528; OSTI ID: 1488380
Grant/Contract Number:  
AC02-06CH11357; AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 98; Journal Issue: 21; 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

Taylor, A. E., Morrow, R., Lumsden, M. D., Calder, S., Upton, M. H., Kolesnikov, A. I., Stone, M. B., Fishman, R. S., Paramekanti, A., Woodward, P. M., and Christianson, A. D. Origin of magnetic excitation gap in double perovskite Sr2FeOsO6. United States: N. p., 2018. Web. doi:10.1103/PhysRevB.98.214422.
Taylor, A. E., Morrow, R., Lumsden, M. D., Calder, S., Upton, M. H., Kolesnikov, A. I., Stone, M. B., Fishman, R. S., Paramekanti, A., Woodward, P. M., & Christianson, A. D. Origin of magnetic excitation gap in double perovskite Sr2FeOsO6. United States. doi:10.1103/PhysRevB.98.214422.
Taylor, A. E., Morrow, R., Lumsden, M. D., Calder, S., Upton, M. H., Kolesnikov, A. I., Stone, M. B., Fishman, R. S., Paramekanti, A., Woodward, P. M., and Christianson, A. D. Wed . "Origin of magnetic excitation gap in double perovskite Sr2FeOsO6". United States. doi:10.1103/PhysRevB.98.214422. https://www.osti.gov/servlets/purl/1489595.
@article{osti_1489595,
title = {Origin of magnetic excitation gap in double perovskite Sr2FeOsO6},
author = {Taylor, A. E. and Morrow, R. and Lumsden, M. D. and Calder, S. and Upton, M. H. and Kolesnikov, A. I. and Stone, M. B. and Fishman, R. S. and Paramekanti, A. and Woodward, P. M. and Christianson, A. D.},
abstractNote = {Sr2FeOsO6 is an insulating double perovskite compound which undergoes antiferromagnetic transitions at 140 (TN1) and 67 K (TN2). To study the underlying electronic and magnetic interactions giving rise to this behavior we have performed inelastic neutron scattering (INS) and resonant inelastic x-ray scattering (RIXS) experiments on polycrystalline samples of Sr2FeOsO6. The INS data reveal that the spectrum of spin excitations remains ungapped below TN1, however below TN2 a gap of 6.8 meV develops. The RIXS data reveals splitting of the T2g multiplet consistent with that seen in other 5d3 osmium based double perovskites. Altogether these results suggest that spin-orbit coupling is important for ground state selection in 3d–5d3 double perovskite materials.},
doi = {10.1103/PhysRevB.98.214422},
journal = {Physical Review B},
number = 21,
volume = 98,
place = {United States},
year = {2018},
month = {12}
}

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