
Department of Physics Papers
Document Type
Journal Article
Date of this Version
12-1-1975
Publication Source
Physical Review B
Volume
12
Issue
11
Start Page
4980
Last Page
5006
DOI
10.1103/PhysRevB.12.4980
Abstract
We give a systematic treatment of the spin excitations of a family of disordered quasi-two-dimensional Heisenberg antiferromagnets, Rb2MnxNi1−xF4, for arbitrary values of x. The density of states, static response functions, and the dynamic susceptibility are calculated numerically. Results at several concentrations are presented graphically. We derive simple analytic theories which give an adequate description of the calculated quantities. The static response functions characterize excitations at low energy and long wave length, and enable us to predict the concentration dependence of the anisotropy gap frequency and the temperature dependence of the magnetization. The dynamic susceptibility is in good agreement with recent neutron-scattering experiments on Rb2Mn0.5Ni0.5F4. The spin-wave density of states for 0.1
Recommended Citation
Kirkpatrick, S. R., & Harris, A. (1975). Theory of the Spin Excitations of Rb2MnxNi1−xF4. Physical Review B, 12 (11), 4980-5006. http://dx.doi.org/10.1103/PhysRevB.12.4980
Date Posted: 12 August 2015
This document has been peer reviewed.