Publication

Temperature dependence of antiferromagnetic resonance mode in two-dimensional system Ni-5(TeO3)(4)Br-2

Helmuth Berger
2008
Conference Papers

Abstract

Antiferromangentic resonance (AFMR) in layered Ni-5(TeO3)(4)Br-2 system with a geometrically frustrated Ni2+ (S =1) spin arrangement has been investigated. Temperature dependence of the lowest mode resonant field could be described with a simple two sublattice model, considering different magnetic susceptibilities. The AFMR linewidth follows a power law T-2.8, due to the magnon-magnon scattering processes. (c) 2007 Elsevier B.V. All rights reserved.

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https://infoscience.epfl.ch/entities/publication/6aa3bd91-8409-4ed5-bc0c-62945115b2a3

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Helmuth Berger
2008
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/6aa3bd91-8409-4ed5-bc0c-62945115b2a3

About this result

Related concepts (19)

Magnetic susceptibility

In electromagnetism, the magnetic susceptibility (; denoted χ, chi) is a measure of how much a material will become magnetized in an applied magnetic field. It is the ratio of magnetization M (magnetic moment per unit volume) to the applied magnetizing field intensity H. This allows a simple classification, into two categories, of most materials' responses to an applied magnetic field: an alignment with the magnetic field, χ > 0, called paramagnetism, or an alignment against the field, χ < 0, called diamagnetism.

Spin wave

In condensed matter physics, a spin wave is a propagating disturbance in the ordering of a magnetic material. These low-lying collective excitations occur in magnetic lattices with continuous symmetry. From the equivalent quasiparticle point of view, spin waves are known as magnons, which are bosonic modes of the spin lattice that correspond roughly to the phonon excitations of the nuclear lattice. As temperature is increased, the thermal excitation of spin waves reduces a ferromagnet's spontaneous magnetization.

Diamagnetism

Diamagnetism is the property of materials that are repelled by a magnetic field; an applied magnetic field creates an induced magnetic field in them in the opposite direction, causing a repulsive force. In contrast, paramagnetic and ferromagnetic materials are attracted by a magnetic field. Diamagnetism is a quantum mechanical effect that occurs in all materials; when it is the only contribution to the magnetism, the material is called diamagnetic.

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