Polarised neutrons and axial-vector interactions in magnetic materials

Autor:	S.V. Maleyev
Rok vydání:	2001
Předmět:	Physics Condensed matter physics Scattering Torsion (mechanics) Neutron scattering Inelastic scattering Condensed Matter Physics Electronic Optical and Magnetic Materials Magnetic field Dipole Condensed Matter::Strongly Correlated Electrons Neutron Electrical and Electronic Engineering Pseudovector
Zdroj:	Physica B: Condensed Matter. 297:67-74
ISSN:	0921-4526
DOI:	10.1016/s0921-4526(00)00838-3
Popis:	Inelastic polarised neutron scattering is analysed when the magnetic interaction includes a part characterised by an axial vector. In this case the dynamical chiral (DC) scattering and inelastic nuclear-magnetic interference (INMI) may appear. As examples we consider magnetic field and antiferromagnets with k AF =0 . Possibilities of other axial-vector interactions such as the Dzialoshinskii–Moriya interaction and elastic torsion are mentioned too. The DC scattering in magnetic field is determined by the three-spin correlations. Their experimental investigation in iron above Tc allows to confirm predictions of the Polyakov–Kadanoff–Wilson operator algebra and demonstrate crossover to the dipolar critical dynamics. The INMI in the antiferromagnets with k AF =0 is considered theoretically and appearance of the infra-red divergence in the case of quasi-2D compound BaNi2(PO4)2 was demonstrated.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::be2f2dcbb08d5ecf16b7038f6b060257 https://doi.org/10.1016/s0921-4526(00)00838-3 Zobrazit plný text záznamu Full Text from ScienceDirect