Calculation of the static magnetization of metamagnetic La sub 2 CuO sub 4

Journal Article · Mon Apr 15 04:00:00 EDT 1991 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.348205· OSTI ID:5811298

Coffey, D ^[1]

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1. Center for Materials Research, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (US)

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 of applied field perpendicular to the CuO layers is used to determine the parameters of the model. Comparison is made with experiment.

• OSTI ID: 5811298
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 69:8; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ANTIFERROMAGNETISM
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CUPRATES
ENERGY
ENERGY LEVELS
FERROMAGNETISM
FREE ENERGY
GROUND STATES
HAMILTONIANS
LANTHANUM COMPOUNDS
LAYERS
MAGNETIC FIELDS
MAGNETISM
MAGNETIZATION
MATHEMATICAL MODELS
MATHEMATICAL OPERATORS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUANTUM OPERATORS
RARE EARTH COMPOUNDS
SPIN WAVES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS