Abstract
The results important for the understanding of the superconducting pairing mechanism obtained with the help of the magnetic inelastic scattering of nonpolarized and polarized neutrons as well as with the magnetic inelastic scattering on 4 f-crystal field excitations are discussed. Measurements of the transition linewidth between 4 f levels of Tm split by crystal fields in (Y, Tm) Ba Cu O compounds are analyzed in the frame of the spin-wave approximation and the phenomenological theory of an antiferromagnetic Fermi liquid. It is shown that in the insulating state the main contribution to the linewidth arises from the one-magnon processes and the gap in the spectrum of magnetic excitations is rather small ({Delta}<100 K). In the superconducting state the main contribution to the linewidth arises from the zone center magnetic fluctuations and the temperature dependence of the linewidth is determined by the static spin susceptibility. (author). 16 refs.; 8 figs.
Aksenov, V L;
[1]
Kabanov, V V
[2]
- Joint Inst. for Nuclear Research, Dubna (Russian Federation). Lab. of Neutron Physics
- Paris-13 Univ., 93 - Villetaneuse (France)
Citation Formats
Aksenov, V L, and Kabanov, V V.
Inelastic neutron scattering and antiferromagnetic fluctuations in high temperature superconductors.
JINR: N. p.,
1993.
Web.
Aksenov, V L, & Kabanov, V V.
Inelastic neutron scattering and antiferromagnetic fluctuations in high temperature superconductors.
JINR.
Aksenov, V L, and Kabanov, V V.
1993.
"Inelastic neutron scattering and antiferromagnetic fluctuations in high temperature superconductors."
JINR.
@misc{etde_10145055,
title = {Inelastic neutron scattering and antiferromagnetic fluctuations in high temperature superconductors}
author = {Aksenov, V L, and Kabanov, V V}
abstractNote = {The results important for the understanding of the superconducting pairing mechanism obtained with the help of the magnetic inelastic scattering of nonpolarized and polarized neutrons as well as with the magnetic inelastic scattering on 4 f-crystal field excitations are discussed. Measurements of the transition linewidth between 4 f levels of Tm split by crystal fields in (Y, Tm) Ba Cu O compounds are analyzed in the frame of the spin-wave approximation and the phenomenological theory of an antiferromagnetic Fermi liquid. It is shown that in the insulating state the main contribution to the linewidth arises from the one-magnon processes and the gap in the spectrum of magnetic excitations is rather small ({Delta}<100 K). In the superconducting state the main contribution to the linewidth arises from the zone center magnetic fluctuations and the temperature dependence of the linewidth is determined by the static spin susceptibility. (author). 16 refs.; 8 figs.}
place = {JINR}
year = {1993}
month = {Dec}
}
title = {Inelastic neutron scattering and antiferromagnetic fluctuations in high temperature superconductors}
author = {Aksenov, V L, and Kabanov, V V}
abstractNote = {The results important for the understanding of the superconducting pairing mechanism obtained with the help of the magnetic inelastic scattering of nonpolarized and polarized neutrons as well as with the magnetic inelastic scattering on 4 f-crystal field excitations are discussed. Measurements of the transition linewidth between 4 f levels of Tm split by crystal fields in (Y, Tm) Ba Cu O compounds are analyzed in the frame of the spin-wave approximation and the phenomenological theory of an antiferromagnetic Fermi liquid. It is shown that in the insulating state the main contribution to the linewidth arises from the one-magnon processes and the gap in the spectrum of magnetic excitations is rather small ({Delta}<100 K). In the superconducting state the main contribution to the linewidth arises from the zone center magnetic fluctuations and the temperature dependence of the linewidth is determined by the static spin susceptibility. (author). 16 refs.; 8 figs.}
place = {JINR}
year = {1993}
month = {Dec}
}