A R Volkel et al 1992 J. Phys.: Condens. Matter 4 9411 doi:10.1088/0953-8984/4/47/021
Dynamics of vortices in quasi-two-dimensional classical Heisenberg magnets with weak easy-plane anisotropy
A R Volkel, A R Bishop, F G Mertens and G M Wysin
Show affiliationsThe authors present a discussion of the dynamical correlation functions for Heisenberg magnets with a weak easy-plane anisotropy for temperatures just above the Kosterlitz-Thouless phase transition. Compared to the XY-model they find here vortices which have in addition to the well known in-plane structure a localized out-of-plane profile around their centre. For the ferromagnetic case this structure produces an effective magnetic field which acts as a gyro force on the other vortices. Assuming a dilute gas of weakly interacting vortices, they find analytic expressions for the vortex contribution to the dynamical correlation functions. These results are compared (i) with numerical Monte Carlo-molecular dynamics simulations on a 100*100 square lattice allowing them to determine values for the vortex correlation length xi and average vortex velocity u and (ii) with experiments performed on different quasi-two-dimensional magnetic materials.
- PACS
-
75.10.-b General theory and models of magnetic ordering
75.30.Kz Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)
71.45.Gm Exchange, correlation, dielectric and magnetic response functions, plasmons
- Subjects
- Dates
-
Issue 47 (23 November 1992)
-
Dynamics of vortices in quasi-two-dimensional classical Heisenberg magnets with weak easy-plane anisotropy
A R Volkel et al 1992 J. Phys.: Condens. Matter 4 9411
-
Reversors and symmetries for polynomial automorphisms of the complex plane
A Gómez and J D Meiss 2004 Nonlinearity 17 975
-
Depth of interaction resolution measurements for a high resolution PET detector using position sensitive avalanche photodiodes
Yongfeng Yang et al 2006 Phys. Med. Biol. 51 2131
-
On the scattering method for the
-equation and reconstruction of convection coefficients
Alexandru Tamasan 2004 Inverse Problems 20 1807
-
Falling faster than in free fall?
J D Hey et al 2004 Eur. J. Phys. 25 63
-
Effects of noise on elliptic bursters
Jianzhong Su et al 2004 Nonlinearity 17 133
-
Synthetic-aperture inversion in the presence of noise and clutter
Birsen Yazici et al 2006 Inverse Problems 22 1705
-
Factors affecting in vivo measurement precision and accuracy of 109Cd K x-ray fluorescence measurements
Fiona E McNeill et al 1999 Phys. Med. Biol. 44 2263
-
Obtaining carbon nanotubes from grass
Zhenhui Kang et al 2005 Nanotechnology 16 1192
-
In vivo study of human skin using pulsed terahertz radiation
E Pickwell et al 2004 Phys. Med. Biol. 49 1595