Calculation of the static magnetism of metamagnetic La sub 2 CuO sub 4
Conference
·
OSTI ID:6657804
Interactions in La{sub 2}CuO{sub 4} are predominantly antiferromagnetic. However a strong field induced transition is seen in the static magnetic susceptibility which points to the existence of a net ferromagnetic moment in the CuO layers. Here, this net ferromagnetic moment is incorporated into a description of the CuO layers by the inclusion of a modified Dzyaloshinskii-Moriya term in the Hamiltonian. The spin wave spectrum in the presence of an applied field is calculated with this Hamiltonian and the ground state is determined as a function of applied field from the free energy. A calculation of the static magnetization as a function applied field perpendicular to the CuO layers is used to determine the parameters of the model. Comparison is made with experiment. 10 refs., 1 fig.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- Sponsoring Organization:
- DOE/AD
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6657804
- Report Number(s):
- LA-UR-90-2799; CONF-901004--1; ON: DE90016490
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ENERGY LEVELS
GROUND STATES
HAMILTONIANS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIZATION
MATHEMATICAL OPERATORS
OXIDES
OXYGEN COMPOUNDS
QUANTUM OPERATORS
RARE EARTH COMPOUNDS
SPIN WAVES
TRANSITION ELEMENT COMPOUNDS
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ENERGY LEVELS
GROUND STATES
HAMILTONIANS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIZATION
MATHEMATICAL OPERATORS
OXIDES
OXYGEN COMPOUNDS
QUANTUM OPERATORS
RARE EARTH COMPOUNDS
SPIN WAVES
TRANSITION ELEMENT COMPOUNDS