Type I antiferromagnetic order in Ba2LuReO6: Exploring the role of structural distortions in double perovskites containing 5d2 ions

Jie Xiong; Jiaqiang Yan; Adam A. Aczel; Patrick M. Woodward

doi:10.1016/j.jssc.2017.11.040

Type I antiferromagnetic order in Ba₂LuReO₆: Exploring the role of structural distortions in double perovskites containing 5d² ions

Jie Xiong, Jiaqiang Yan, Adam A. Aczel, Patrick M. Woodward

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

The structural, electrical, and magnetic properties of the double perovskite Ba₂LuReO₆ have been examined. 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 5d² ions in other antiferromagnetically ordered cubic double perovskites. Comparisons with related double perovskites containing 5d² ions, such as Os⁶⁺ and Re⁵⁺, 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.

Original language	English
Pages (from-to)	762-767
Number of pages	6
Journal	Journal of Solid State Chemistry
Volume	258
DOIs	https://doi.org/10.1016/j.jssc.2017.11.040
State	Published - Feb 2018

Funding

Support for this research was provided by the Center for Emergent Materials, an NSF Materials Research Science and Engineering Center (DMR-1420451). A portion of this research used resources at the High Flux Isotope Reactor and the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. Additional work at ORNL was supported by the US Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. Use of the Advanced Photon Source at Argonne National Laboratory was supported by the U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.

Keywords

5d transition metal oxide
Antiferromagnetism
Double perovskite
Magnetic material

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10.1016/j.jssc.2017.11.040

Cite this

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title = "Type I antiferromagnetic order in Ba2LuReO6: Exploring the role of structural distortions in double perovskites containing 5d2 ions",

abstract = "The structural, electrical, and magnetic properties of the double perovskite Ba2LuReO6 have been examined. 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 TN = 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)μB per Re is comparable to estimates of moments on 5d2 ions in other antiferromagnetically ordered cubic double perovskites. Comparisons with related double perovskites containing 5d2 ions, such as Os6+ and Re5+, 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 N{\'e}el temperature.",

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T2 - Exploring the role of structural distortions in double perovskites containing 5d2 ions

AU - Xiong, Jie

AU - Yan, Jiaqiang

AU - Aczel, Adam A.

AU - Woodward, Patrick M.

PY - 2018/2

Y1 - 2018/2

N2 - The structural, electrical, and magnetic properties of the double perovskite Ba2LuReO6 have been examined. 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 TN = 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)μB per Re is comparable to estimates of moments on 5d2 ions in other antiferromagnetically ordered cubic double perovskites. Comparisons with related double perovskites containing 5d2 ions, such as Os6+ and Re5+, 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.

AB - The structural, electrical, and magnetic properties of the double perovskite Ba2LuReO6 have been examined. 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 TN = 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)μB per Re is comparable to estimates of moments on 5d2 ions in other antiferromagnetically ordered cubic double perovskites. Comparisons with related double perovskites containing 5d2 ions, such as Os6+ and Re5+, 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.

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