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Title: Type I antiferromagnetic order in Ba 2LuReO 6: Exploring the role of structural distortions in double perovskites containing 5d 2 ions

The structural, electrical, and magnetic properties of the double perovskite Ba 2LuReO 6 have been examined in this paper. It is an insulator whose temperature dependent conductivity is consistent with variable range hopping electrical transport. A transition to an antiferromagnet state with type I order occurs below T N = 31 K. High resolution time-of-flight neutron powder diffraction measurements show that it retains the cubic double perovskite structure down to 10 K. High intensity, low resolution neutron powder diffraction measurements confirm the antiferromagnetic order and indicate that cubic symmetry is still observed at 1.5 K. The small ordered moment of 0.34(4)μ B per Re is comparable to estimates of moments on 5d 2 ions in other antiferromagnetically ordered cubic double perovskites. Finally, comparisons with related double perovskites containing 5d 2 ions, such as Os 6+ and Re 5+, reveal that subtle changes in structure or electron configuration of the diamagnetic octahedral cations can have a large impact on the magnetic ground state, the size of the ordered moment, and the Néel temperature.
Authors:
 [1] ;  [2] ;  [3] ;  [1]
  1. The Ohio State Univ., Columbus, OH (United States). Dept. of Chemistry and Biochemistry
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Scattering Division
Publication Date:
Grant/Contract Number:
AC05-00OR22725; AC02-06CH11357; DMR-1420451
Type:
Accepted Manuscript
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 258; Journal ID: ISSN 0022-4596
Publisher:
Elsevier
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); The Ohio State Univ., Columbus, OH (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; double perovskite; 5d transition metal oxide; antiferromagnetism; magnetic material
OSTI Identifier:
1423055