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Low energy spin wave excitations in amplitude modulated magnetic structure of PrNi2Si2

Blanco, J. A.; Fak, B.; Jensen, J.; Rotter, M.; Hiess, Arno LU ; Schmitt, D. and Lejay, P. (2015) 7th Meeting of the Spanish-Neutron-Scattering-Association (SETN) In Journal of Physics: Conference Series 663. p.012010-012010
Abstract
Inelastic neutron scattering (INS) experiments and random phase approximation calculations have been used to investigate the low energy spin wave excitations in PrNi2Si2. The modulated magnitude of the ordered magnetic moments of Pr3+ ions implies that the associate, longitudinally polarized magnetic excitations are more intense and dispersive than the usual transverse spin waves. Within the random phase approximation the results are in good overall agreement with the predictions made by the model determined previously from the paramagnetic excitations. The most unusual observation is the well defined amplitude mode detected close to the magnetic Bragg point existing simultaneously with the phason mode. At low energies, an extra mode is... (More)
Inelastic neutron scattering (INS) experiments and random phase approximation calculations have been used to investigate the low energy spin wave excitations in PrNi2Si2. The modulated magnitude of the ordered magnetic moments of Pr3+ ions implies that the associate, longitudinally polarized magnetic excitations are more intense and dispersive than the usual transverse spin waves. Within the random phase approximation the results are in good overall agreement with the predictions made by the model determined previously from the paramagnetic excitations. The most unusual observation is the well defined amplitude mode detected close to the magnetic Bragg point existing simultaneously with the phason mode. At low energies, an extra mode is observed to hybridize with the magnetic phasons in the neighborhood of the magnetic Brillouin zone center. A magnetoelastic interaction between the magnetic excitations and the longitudinal phonons is able to explain part of the disturbances, but it is concluded that the extra mode must be of some other, unknown origin. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
Journal of Physics: Conference Series
volume
663
pages
012010 - 012010
publisher
IOP Publishing
conference name
7th Meeting of the Spanish-Neutron-Scattering-Association (SETN)
external identifiers
  • wos:000368084300010
  • scopus:84959090791
ISSN
1742-6588
1742-6596
DOI
10.1088/1742-6596/663/1/012010
language
English
LU publication?
yes
id
e65c0a4a-e060-432f-afc1-ff2fd6143b04 (old id 8754530)
date added to LUP
2016-02-23 07:51:53
date last changed
2017-01-01 04:18:23
@inproceedings{e65c0a4a-e060-432f-afc1-ff2fd6143b04,
  abstract     = {Inelastic neutron scattering (INS) experiments and random phase approximation calculations have been used to investigate the low energy spin wave excitations in PrNi2Si2. The modulated magnitude of the ordered magnetic moments of Pr3+ ions implies that the associate, longitudinally polarized magnetic excitations are more intense and dispersive than the usual transverse spin waves. Within the random phase approximation the results are in good overall agreement with the predictions made by the model determined previously from the paramagnetic excitations. The most unusual observation is the well defined amplitude mode detected close to the magnetic Bragg point existing simultaneously with the phason mode. At low energies, an extra mode is observed to hybridize with the magnetic phasons in the neighborhood of the magnetic Brillouin zone center. A magnetoelastic interaction between the magnetic excitations and the longitudinal phonons is able to explain part of the disturbances, but it is concluded that the extra mode must be of some other, unknown origin.},
  author       = {Blanco, J. A. and Fak, B. and Jensen, J. and Rotter, M. and Hiess, Arno and Schmitt, D. and Lejay, P.},
  booktitle    = {Journal of Physics: Conference Series},
  issn         = {1742-6588},
  language     = {eng},
  pages        = {012010--012010},
  publisher    = {IOP Publishing},
  title        = {Low energy spin wave excitations in amplitude modulated magnetic structure of PrNi2Si2},
  url          = {http://dx.doi.org/10.1088/1742-6596/663/1/012010},
  volume       = {663},
  year         = {2015},
}