Large in-plane deformation of RuO6 octahedron and ferromagnetism of bulk SrRuO3

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Title
Large in-plane deformation of RuO6 octahedron and ferromagnetism of bulk SrRuO3
Author(s)
Sanghyun Lee; J R Zhang; S Torii; Seongil Choi; Deok-Yong Cho; T Kamiyama; Jaejun Yu; K A McEwen; Je Geun Park
Publication Date
2013-11
Journal
JOURNAL OF PHYSICS-CONDENSED MATTER, v.25, no.46, pp.465601 -
Publisher
IOP PUBLISHING LTD
Abstract
SrRuO3 is a ferromagnetic metal with several unusual physical properties such as zero thermal expansion below T-c, so-called Invar behavior. Another anomalous feature is that the a-axis lattice constant is larger than the b-axis lattice constant, a clear deviation from the predictions of the Glazer structural description with rigid RuO6 octahedron motion. Using high resolution neutron diffraction techniques, we show how these two structural anomalies arise from the irregular in-plane deformation, i.e. plastic behavior of the RuO6 octahedron, a weak band Jahn-Teller distortion. We further demonstrate that the ferromagnetic instability of SrRuO3 is related to the temperature-induced localization of Ru 4d bands.
URI
https://pr.ibs.re.kr/handle/8788114/1224
ISSN
0953-8984
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
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