Journal Article

PreJuSER-51542

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png High-pressure diffraction studies on Ca2RuO4

Stephens, P. ; Friedt, O. ; Marshall, W. G. ; Schmidt, W.FZJ* ; Nakamura, F. ; Nakatsuji, S. ; Maeno, Y. ; Lengssdorf, R. ; Abd-Elmeguid, M. M. ; Braden, M.

2005
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/1153  doi:10.1103/PhysRevB.72.094104

Abstract: We studied the crystal and magnetic structure of Ca2RuO4 as function of pressure with different diffraction techniques. The first-order phase transition observed at a moderate pressure of P=0.5 GPa between the insulating and the metallic high-pressure phase is characterized by a broad region of phase coexistence. The following structural changes are observed as function of pressure: (a) A discontinuous change of both the tilt and rotational angle of the RuO6-octahedra at this transition, (b) a gradual decrease of the tilt angle in the high-pressure phase (P>0.5 GPa), and (c) the disappearance of the tilt above 5.5 GPa leading to a higher symmetry structure. The magnetism was studied by single-crystal neutron diffraction: The ferromagnetic component of the high-pressure phase and a rearrangement of antiferromagnetic order in the low-pressure phase have been observed.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Neutronenstreuung (IFF-INS)

Research Program(s):

1. Betrieb und Weiterentwicklung der Neutronenquelle FRJ- 2 (M05)
2. Kondensierte Materie (M02)

Appears in the scientific report 2005
Notes: Nachtrag
Notes: This version is available at the following Publisher URL: http://prb.aps.org

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