Antiferromagnetism in La/sub 2/CuO/sub 4-//sub y/

Journal Article · Mon Jun 29 04:00:00 EDT 1987 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.58.2802· OSTI ID:6511833

Vaknin, D; Sinha, S K; Moncton, D E; Johnston, D C; Newsam, J M; Safinya, C R; King, Jr, H E

Powder neutron diffraction studies of undoped La/sub 2/CuO/sub 4-//sub y/ have revealed new superlattice peaks below --220 K. The absence of corresponding x-ray superlattice lines and an observed susceptibility anomaly near 220 K suggest the occurrence of antiferromagnetism. From the magnetic peak intensities we deduce a structure consisting of ferromagnetic sheets of Cu spins alternating along the (100) orthorhombic axis, with the spins aligned along the (001) orthorhombic axis, The low-temperature magnetic moment is approximately 0.5..mu../sub B//(Cu atom). The tetragonal-orthorhombic transition at 505 K has also been studied.

• Research Organization: Corporate Research Laboratories, Exxon Research and Engineering Company, Annandale, New Jersey 08801
• OSTI ID: 6511833
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 58:26; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALIGNMENT
ANGULAR MOMENTUM
ANTIFERROMAGNETIC MATERIALS
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIC MATERIALS
MATERIALS
NEUTRON DIFFRACTION
OXIDES
OXYGEN COMPOUNDS
PARTICLE PROPERTIES
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SCATTERING
SPIN
SUPERCONDUCTIVITY
SUPERLATTICES
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION