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26 April 2024 |
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Ba2YIrO6: A cubic double perovskite material with Ir5+ ions | | T. Dey
; A. Maljuk
; D. V. Efremov
; O. Kataeva
; S. Gass
; C. G. F. Blum
; F. Steckel
; D. Gruner
; T. Ritschel
; A. U. B. Wolter
; J. Geck
; C. Hess
; K. Koepernik
; J. van den Brink
; S. Wurmehl
; B. Büchner
; | | Date: |
4 Feb 2016 | | Abstract: | Materials with a 5d4 electronic configuration are generally considered to
have a nonmagnetic ground state (J=0). Interestingly, Sr2YIrO6 (Ir5+ having 5d4
electronic configuration) was recently reported to exhibit long-range magnetic
order at low temperature and the distorted IrO6 octahedra were discussed to
cause the magnetism in this material. Hence, a comparison of structurally
distorted Sr2YIrO6 with cubic Ba2YIrO6 may shed light on the source of
magnetism in such Ir5+ materials with 5d4 configuration. Besides, Ir5+
materials having 5d4 are also interesting in the context of recently predicted
excitonic types of magnetism. Here we report a single-crystal-based analysis of
the structural, magnetic, and thermodynamic properties of Ba2YIrO6. We observe
that in Ba2YIrO6 for temperatures down to 0.4 K, long-range magnetic order is
absent but at the same time correlated magnetic moments are present. We show
that these moments are absent in fully relativistic ab initio band-structure
calculations; hence, their origin is presently unclear. | | Source: | arXiv, 1602.1670 | | Services: | Forum | Review | PDF | Favorites | |
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