Crystal and magnetic structure of Ca3Ru2O7
Creators
- 1. Advanced Science Research Center, Japan Atomic Energy Research Institute (JAERI), Tokai, Ibaraki 319-1195 (Japan)
- 2. Energy Technology Research Institute, National Institute of Advanced Industrial and Technology (AIST), Tsukuba, 305-8568 (Japan)
- 3. Nanoelectronics Research Institute, National Institute of Advanced Industrial and Technology (AIST), Tsukuba, 305-8568 (Japan)
- 4. 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)
Description
The crystal structure of the double-layered Ca3Ru2O7 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 Bb21m. 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
Additional details
Identifiers
Publishing Information
- Journal Title
- Physical Review. B, Condensed Matter and Materials Physics
- Journal Volume
- 72
- Journal Issue
- 5
- Journal Page Range
- p. 054412-054412.7
- ISSN
- 1098-0121
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 37031558
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE;
- Descriptors DEI
- 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
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BEAMS; CHALCOGENIDES; COHERENT SCATTERING; DIFFRACTION; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; ELEMENTS; LEPTON BEAMS; MAGNETIC MATERIALS; MAGNETISM; MATERIALS; OXIDES; OXYGEN COMPOUNDS; PARTICLE BEAMS; PHYSICAL PROPERTIES; REFRACTORY METAL COMPOUNDS; RUTHENIUM COMPOUNDS; SCATTERING; SYMMETRY GROUPS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS; TRANSITION TEMPERATURE
Optional Information
- Notes
- (c) 2005 The American Physical Society