Itinerant G-type antiferromagnetic order in SrCr2As2

Itinerant G-type antiferromagnetic order in SrCr2As2 Neutron-diffraction and magnetic susceptibility studies of polycrystalline SrCr2As2 reveal that this compound is an itinerant G-type antiferromagnet below the Néel temperature TN = 590(5) K with the Cr magnetic moments aligned along the tetragonal c axis. The system remains tetragonal to the lowest measured temperature (∼12 K). The lattice parameter ratio c/a and the magnetic moment saturate at about the same temperature below ∼200 K, indicating a possible magnetoelastic coupling. The ordered moment μ=1.9(1)μB/Cr, measured at T=12 K, is significantly reduced compared to its localized value (4μB/Cr) due to the itinerant character brought about by hybridization between the Cr 3d and As 4p orbitals. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review B American Physical Society (APS)
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Itinerant G-type antiferromagnetic order in SrCr2As2

Abstract

Neutron-diffraction and magnetic susceptibility studies of polycrystalline SrCr2As2 reveal that this compound is an itinerant G-type antiferromagnet below the Néel temperature TN = 590(5) K with the Cr magnetic moments aligned along the tetragonal c axis. The system remains tetragonal to the lowest measured temperature (∼12 K). The lattice parameter ratio c/a and the magnetic moment saturate at about the same temperature below ∼200 K, indicating a possible magnetoelastic coupling. The ordered moment μ=1.9(1)μB/Cr, measured at T=12 K, is significantly reduced compared to its localized value (4μB/Cr) due to the itinerant character brought about by hybridization between the Cr 3d and As 4p orbitals.
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Publisher
American Physical Society (APS)
Copyright
Copyright © ©2017 American Physical Society
ISSN
1098-0121
eISSN
1550-235X
D.O.I.
10.1103/PhysRevB.96.014411
Publisher site
See Article on Publisher Site

Abstract

Neutron-diffraction and magnetic susceptibility studies of polycrystalline SrCr2As2 reveal that this compound is an itinerant G-type antiferromagnet below the Néel temperature TN = 590(5) K with the Cr magnetic moments aligned along the tetragonal c axis. The system remains tetragonal to the lowest measured temperature (∼12 K). The lattice parameter ratio c/a and the magnetic moment saturate at about the same temperature below ∼200 K, indicating a possible magnetoelastic coupling. The ordered moment μ=1.9(1)μB/Cr, measured at T=12 K, is significantly reduced compared to its localized value (4μB/Cr) due to the itinerant character brought about by hybridization between the Cr 3d and As 4p orbitals.

Journal

Physical Review BAmerican Physical Society (APS)

Published: Jul 7, 2017

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