Journal article

A study of the quantum classical crossover in the spin dynamics of the 2D S=5/2 antiferromagnet Rb2MnF4: neutron scattering, computer simulations, and analytic theories

Abstract:

We report comprehensive inelastic neutron scattering measurements of the magnetic excitations in the 2D spin-5/2 Heisenberg antiferromagnet Rb2MnF4 as a function of temperature from deep in the Neel ordered phase up to paramagnetic, 0.13 < kBT/4JS < 1.4. Well defined spin-waves are found for wave-vectors larger than the inverse correlation length $\eta^{-1}$ for temperatures up to near the Curie-Weiss temperature, $\Theta_{CW}$. For wave-vectors smaller than $\eta^{-1}$, relaxational dy...

Publication status:
Published

Authors

More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Condensed Matter Physics
Role:
Author
Journal:
J. Stat. Mech. (2008) P05017
Volume:
2008
Issue:
5
Pages:
P05017-P05017
Publication date:
2008-04-17
DOI:
EISSN:
1742-5468
ISSN:
1742-5468
Language:
English
Keywords:
Pubs id:
pubs:158257
UUID:
uuid:6b5c10ba-938a-4785-b1ce-9177933d259a
Local pid:
pubs:158257
Source identifiers:
158257
Deposit date:
2012-12-19