Crystal and magnetic structure of Ca{sub 3}Ru{sub 2}O{sub 7}

Journal Article · Mon Aug 01 00:00:00 EDT 2005 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.72.054412· OSTI ID:20719295

Yoshida, Yoshiyuki; Ikeda, Shin-Ichi; Matsuhata, Hirofumi; Shirakawa, Naoki; Lee, C H; Katano, Susumu ^[1]

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1. Japan Society for the Promotion of Science, Chiyoda, Tokyo 102-8471, Japan and Nanoelectronics Research Institute, National Institute of Advanced Industrial and Technology (AIST), Tsukuba, 305-8568 (Japan)

The crystal structure of the double-layered Ca{sub 3}Ru{sub 2}O{sub 7} has been studied by convergent beam electron diffraction and powder neutron diffraction. The temperature dependence of the diffraction pattern reveals that all the lattice constants jump at the first-order metal-nonmetal transition at 48 K without a change of the space group symmetry of Bb2{sub 1}m. In the neutron diffraction experiment, an additional magnetic reflection emerges below the Neel temperature, 56 K. A possible model for this antiferromagnetic ordering is proposed, in which model magnetic moments align ferromagnetically within the double layer and antiferromagnetically between the double layers. This model reasonably explains the characteristic field dependence of the magnetoresistance observed at around 6 T.

• OSTI ID: 20719295
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 72, Issue 5; Other Information: DOI: 10.1103/PhysRevB.72.054412; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETIC MATERIALS
ANTIFERROMAGNETISM
CALCIUM COMPOUNDS
CRYSTAL STRUCTURE
CRYSTALS
ELECTRON BEAMS
ELECTRON DIFFRACTION
FERROMAGNETIC MATERIALS
LATTICE PARAMETERS
LAYERS
MAGNETIC MOMENTS
MAGNETORESISTANCE
METALS
NEEL TEMPERATURE
NEUTRON DIFFRACTION
NONMETALS
PHASE TRANSFORMATIONS
REFLECTION
RUTHENIUM OXIDES
SPACE GROUPS
SYMMETRY
TEMPERATURE DEPENDENCE