Excitations in a Two-Dimensional Random Antiferromagnet

R. J. Birgeneau; L. R. Walker; H. J. Guggenheim; Jens Aage Als-Nielsen

doi:10.1088/0022-3719/8/15/006

Excitations in a Two-Dimensional Random Antiferromagnet

R. J. Birgeneau, L. R. Walker, H. J. Guggenheim, Jens Aage Als-Nielsen

Research output: Contribution to journal › Letter › peer-review

Abstract

Inelastic neutron scattering studies of the magnetic excitations in the planar Heisenberg random antiferromagnet Rb2Mn0.5Ni0.5F4 at 7K are reported. Two well-defined bands of excitations are observed. A simple mean crystal model is found to predict accurately the measured dispersion relations using essentially the pure crystal parameters while the zone boundary energy widths are well-accounted for by an Ising cluster mode. Intensities, however, are not properly explained using these simple models.

Original language	English
Journal	Journal of Physics C: Solid State Physics
Volume	8
Issue number	15
Pages (from-to)	L328-L333
ISSN	0022-3719
DOIs	https://doi.org/10.1088/0022-3719/8/15/006
Publication status	Published - 1975

Access to Document

10.1088/0022-3719/8/15/006

OpenUrl availability

Full text

Cite this

@article{b629ce713ae04b12990c85e267027e4a,

title = "Excitations in a Two-Dimensional Random Antiferromagnet",

abstract = "Inelastic neutron scattering studies of the magnetic excitations in the planar Heisenberg random antiferromagnet Rb2Mn0.5Ni0.5F4 at 7K are reported. Two well-defined bands of excitations are observed. A simple mean crystal model is found to predict accurately the measured dispersion relations using essentially the pure crystal parameters while the zone boundary energy widths are well-accounted for by an Ising cluster mode. Intensities, however, are not properly explained using these simple models.",

author = "Birgeneau, {R. J.} and Walker, {L. R.} and Guggenheim, {H. J.} and Als-Nielsen, {Jens Aage}",

year = "1975",

doi = "10.1088/0022-3719/8/15/006",

language = "English",

volume = "8",

pages = "L328--L333",

journal = "Journal of Physics C: Solid State Physics",

issn = "0022-3719",

publisher = "Institute of Physics",

number = "15",

}

TY - JOUR

T1 - Excitations in a Two-Dimensional Random Antiferromagnet

AU - Birgeneau, R. J.

AU - Walker, L. R.

AU - Guggenheim, H. J.

AU - Als-Nielsen, Jens Aage

PY - 1975

Y1 - 1975

N2 - Inelastic neutron scattering studies of the magnetic excitations in the planar Heisenberg random antiferromagnet Rb2Mn0.5Ni0.5F4 at 7K are reported. Two well-defined bands of excitations are observed. A simple mean crystal model is found to predict accurately the measured dispersion relations using essentially the pure crystal parameters while the zone boundary energy widths are well-accounted for by an Ising cluster mode. Intensities, however, are not properly explained using these simple models.

AB - Inelastic neutron scattering studies of the magnetic excitations in the planar Heisenberg random antiferromagnet Rb2Mn0.5Ni0.5F4 at 7K are reported. Two well-defined bands of excitations are observed. A simple mean crystal model is found to predict accurately the measured dispersion relations using essentially the pure crystal parameters while the zone boundary energy widths are well-accounted for by an Ising cluster mode. Intensities, however, are not properly explained using these simple models.

U2 - 10.1088/0022-3719/8/15/006

DO - 10.1088/0022-3719/8/15/006

M3 - Letter

VL - 8

SP - L328-L333

JO - Journal of Physics C: Solid State Physics

JF - Journal of Physics C: Solid State Physics

SN - 0022-3719

IS - 15

ER -

Excitations in a Two-Dimensional Random Antiferromagnet

Abstract

Access to Document

OpenUrl availability

Fingerprint

Cite this