Phasons, amplitude modes, and spin waves in the amplitude-modulated magnetic phase of PrNi2Si2

J.A. Blanco; B. Fak; Jens Jensen; M. Rotter; A. Hiess; D. Schmitt; P. Lejay

doi:10.1103/physrevb.87.104411

Phasons, amplitude modes, and spin waves in the amplitude-modulated magnetic phase of PrNi₂Si₂

J.A. Blanco, B. Fak, Jens Jensen, M. Rotter, A. Hiess, D. Schmitt, P. Lejay

Condensed Matter Physics

4 Citations (Scopus)

Abstract

The magnetic excitations in the low-temperature amplitude-modulated magnetic structure of PrNi₂Si₂ have been investigated by inelastic neutron scattering. The dispersions and intensities of both longitudinal and transverse excitations are measured along the high-symmetry directions. The modulated magnitude of the ordered moments implies that the longitudinally polarized magnetic excitations are more intense and dispersive than the usual transverse spin waves. Several well-defined longitudinal amplitude modes are observed to coexist with the longitudinal phason mode. The experimental results are in good overall agreement with predictions from the random-phase approximation, using parameters already established from the macroscopic properties and the paramagnetic excitations. At low energies in the neighborhood of the magnetic zone center, the magnetic phason appears to hybridize with an unidentified dispersionless mode.

Original language	English
Article number	104411
Journal	Physical Review B
Volume	766
Issue number	1
Number of pages	9
ISSN	2469-9950
DOIs	https://doi.org/10.1103/physrevb.87.104411
Publication status	Published - 20 Mar 2013

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10.1103/physrevb.87.104411

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title = "Phasons, amplitude modes, and spin waves in the amplitude-modulated magnetic phase of PrNi2Si2",

abstract = "The magnetic excitations in the low-temperature amplitude-modulated magnetic structure of PrNi2Si2 have been investigated by inelastic neutron scattering. The dispersions and intensities of both longitudinal and transverse excitations are measured along the high-symmetry directions. The modulated magnitude of the ordered moments implies that the longitudinally polarized magnetic excitations are more intense and dispersive than the usual transverse spin waves. Several well-defined longitudinal amplitude modes are observed to coexist with the longitudinal phason mode. The experimental results are in good overall agreement with predictions from the random-phase approximation, using parameters already established from the macroscopic properties and the paramagnetic excitations. At low energies in the neighborhood of the magnetic zone center, the magnetic phason appears to hybridize with an unidentified dispersionless mode.",

author = "J.A. Blanco and B. Fak and Jens Jensen and M. Rotter and A. Hiess and D. Schmitt and P. Lejay",

year = "2013",

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TY - JOUR

T1 - Phasons, amplitude modes, and spin waves in the amplitude-modulated magnetic phase of PrNi2Si2

AU - Blanco, J.A.

AU - Fak, B.

AU - Jensen, Jens

AU - Rotter, M.

AU - Hiess, A.

AU - Schmitt, D.

AU - Lejay, P.

PY - 2013/3/20

Y1 - 2013/3/20

N2 - The magnetic excitations in the low-temperature amplitude-modulated magnetic structure of PrNi2Si2 have been investigated by inelastic neutron scattering. The dispersions and intensities of both longitudinal and transverse excitations are measured along the high-symmetry directions. The modulated magnitude of the ordered moments implies that the longitudinally polarized magnetic excitations are more intense and dispersive than the usual transverse spin waves. Several well-defined longitudinal amplitude modes are observed to coexist with the longitudinal phason mode. The experimental results are in good overall agreement with predictions from the random-phase approximation, using parameters already established from the macroscopic properties and the paramagnetic excitations. At low energies in the neighborhood of the magnetic zone center, the magnetic phason appears to hybridize with an unidentified dispersionless mode.

AB - The magnetic excitations in the low-temperature amplitude-modulated magnetic structure of PrNi2Si2 have been investigated by inelastic neutron scattering. The dispersions and intensities of both longitudinal and transverse excitations are measured along the high-symmetry directions. The modulated magnitude of the ordered moments implies that the longitudinally polarized magnetic excitations are more intense and dispersive than the usual transverse spin waves. Several well-defined longitudinal amplitude modes are observed to coexist with the longitudinal phason mode. The experimental results are in good overall agreement with predictions from the random-phase approximation, using parameters already established from the macroscopic properties and the paramagnetic excitations. At low energies in the neighborhood of the magnetic zone center, the magnetic phason appears to hybridize with an unidentified dispersionless mode.

U2 - 10.1103/physrevb.87.104411

DO - 10.1103/physrevb.87.104411

M3 - Journal article

SN - 2469-9950

VL - 766

JO - Physical Review B

JF - Physical Review B

IS - 1

M1 - 104411

ER -

Phasons, amplitude modes, and spin waves in the amplitude-modulated magnetic phase of PrNi2Si2

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Phasons, amplitude modes, and spin waves in the amplitude-modulated magnetic phase of PrNi₂Si₂