Weak ferromagnetism in antiferromagnets: alpha-Fe2O3 and La2CuO4 / Mazurenko VV,Anisimov VI // PHYSICAL REVIEW B. - 2005. - V. 71, l. 18.

ISSN/EISSN:

2469-9950 / 2469-9969

Type:

Article

Abstract:

The problem of weak ferromagnetism in antiferromagnets due to canting of magnetic moments is treated using Green's function technique. At first the eigenvalues and eigenfunctions of the electronic Hamiltonian corresponding to collinear magnetic configuration are calculated which are then used to determine the first and the second variations of the total energy as a function of the magnetic moments canting angle. Spin-orbit coupling is taken into account via perturbation theory. The results of calculations are used to determine an effective spin Hamiltonian. This Hamiltonian can be mapped on the conventional spin Hamiltonian that allows one to determine parameters of isotropic and anisotropic (Dzyaloshinskii-Moriya) exchange interactions. The method is applied to the typical antiferromagnets with weak ferromagnetism alpha-Fe2O3 and La2CuO4. The obtained values of the magnetic moments canting angles are in good agreement with previous theoretical results and are in reasonable agreement with experimental data.

Author keywords:

ANISOTROPIC SUPEREXCHANGE INTERACTION; MAGNETIC-PROPERTIES; EXCHANGE INTERACTIONS; 1ST-PRINCIPLES CALCULATIONS; ELECTRONIC-STRUCTURE; CORRELATED SYSTEMS; NEUTRON-SCATTERING; VANADATES CAV2O5; SINGLE-CRYSTALS; BAND THEORY

DOI:

10.1103/PhysRevB.71.184434

Web of Science ID:

ISI:000230124100090

Соавторы в МНС:

Другие поля

Поле	Значение
Month	MAY
Publisher	AMER PHYSICAL SOC
Address	ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Language	English
Article-Number	184434
EISSN	2469-9969
Keywords-Plus	ANISOTROPIC SUPEREXCHANGE INTERACTION; MAGNETIC-PROPERTIES; EXCHANGE INTERACTIONS; 1ST-PRINCIPLES CALCULATIONS; ELECTRONIC-STRUCTURE; CORRELATED SYSTEMS; NEUTRON-SCATTERING; VANADATES CAV2O5; SINGLE-CRYSTALS; BAND THEORY
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
ResearcherID-Numbers	Anisimov, Vladimir/K-1235-2013 Mazurenko, Vladimir/E-7694-2011 Mazurenko, Vladimir/P-9241-2017
ORCID-Numbers	Anisimov, Vladimir/0000-0002-1087-1956
Number-of-Cited-References	49
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	23
Journal-ISO	Phys. Rev. B
Doc-Delivery-Number	940DO