- Autor(in)
- Sponsor(in)
- Referenz
-
10 J. M. Kosterlitz, D. J. Thouless, J. Phys. C6 (1973) 1181
11 V. L. Berezinsky, Sov. Phys. JETP 34 (1972) 610
12 F. G. Mertens, A. R. Bishop, G. M. Wysin, C. Kawabata, Phys. Rev. Lett. 59 (1987) 117
13 F. G. Mertens, A. R. Bishop, G. M. Wysin, C. Kawabata, Phys. Rev. B39 (1989) 591
14 M. E. Gouvêa, G. M. Wysin, A. R. Bishop, F. G. Mertens, Phys. Rev. B39 (1989) 11840
15 M. E. Gouvêa, G. M. Wysin, A. R. Bishop, F. G. Mertens, J. Phys. Condens. Matter 1 (1989) 4387
16 M. E. Gouvêa, F. G. Mertens, A. R. Bishop, G. M. Wysin, J. Phys. Condens. Matter 2 (1990) 1853
17 A. R. Völkel, A. R. Bishop, F. G. Mertens, G. M. Wysin, J. Phys.: Condensed Matter 4 (1992) 9411
18 A. R. Völkel, G. M. Wysin, A. R. Bishop, F. G. Mertens, Phys. Rev. B44 (1991) 10066
19 P. M. Richards, M. B. Salamon, Phys. Rev. B9 (1974) 32
1 L. J. de Jongh, Magnetic Properties of Layered Transition Metal Compounds, Kluwer Academic Publisher, 1990
20 H. Yoshida, K. Saiki, J. Phys. Soc. Japan 33 (1972) 1566
21 I. Dzyaloshinsky, J. Phys. Chem. Solids 4 (1958) 241
22 T. Moriya, Phys. Rev. 120 (1960) 91
23 K. Maki, Phys. Rev. B24 (1981) 3991
24 T. Holstein, H. Primakoff, Phys. Rev. 58 (1940) 1098
25 H. J. Mikeska, J. Phys. C13 (1980) 2913
26 D. R. Nelson, J. M. Kosterlitz, Phys. Rev. Lett. 39 (1977) 1201
27 G. M. Wysin, A. R. Bishop, Phys. Rev. B42 (1990) 810
28 D. L. Huber, Phys. Rev. B26 (1982) 3758
29 S. T. Bramwell, P. C. W. Holdsworth, preprint
2 L. P. Regnault, C. Lartigue, J. F. Legrand, B. Farago, J. Rossat-Mignot, J. Y. Henry, Physica B 156 - 157 (1989) 298
3 P. Gaveau, J. P. Boucher, L. P. Regnault, J. Y. Henry, J. Appl. Phys. 69 (27) (1991) 6228
4 K. Hirakawa, H. Yoshizawa, K. Ubokoshi, J. Phys. Soc. Japan 51 (1982) 2151
5 M. Aïn, J. Physique 48 (1987) 2103
6 D. G. Wiesler, H. Zabel, S. M. Shapiro, Physica B156 - 157 (1989) 292
7 M. Pomerantz, Surface Science 142 (1984) 556;
8 T. Haseda, H. Yamakawa, M. Ishizuka, Y. Okuda, T. Kubota, M. Hata, K. Amaya, Solid State Commun. 24 (1977) 599
9 D. I. Head, B. H. Blott, D. Melville, J. Physique C8 (1988) 1649
M. Pomerantz, in: NATO Advanced Study Institute, Vol. 51, Phase Transitions in Surface Films. J. Dash, J. Ruvalds (eds.), Plenum Press, New York 1980, p. 217
- Seitenbereich
-
0308 - 0319
- Schlagwort(e)
-
<KWD>Antiferromagnet
Vortex dynamics
Weak ferromagnetism
- Zusammenfsg.
-
We investigate the spin dynamics of the classical two-dimensional easy-plane Heisenberg antiferromagnet with an additional Dzyaloshinsky interaction, which serves as a simple model for Langmuir-Blodgett films of Mn (C<sub>18</sub>H<sub>35</sub>O<sub>2</sub>)<sub>2</sub>. By mapping the system onto a pure easy-plane model we discuss the corresponding spin wave and vortex dynamics. The additional Dzyaloshinsky interaction forces all spins to cant in a certain direction, which is the same for neighboring spins on different sublattices. This canting causes the presence of a second spin wave peak in the dynamical in-plane correlation function below the Kosterlitz-Thouless transition temperature <I>T</I><sub><I>KT</I></sub> and a second vortex central peak above <I>T</I><sub><I>KT</I></sub>. Using a vortex gas approach we explicitly calculate the contribution of the free vortices to several dynamical correlation functions. These results are compared to a combined Monte Carlo-Molecular Dynamics simulation on square lattices with different sizes. We also discuss the relevance of this simple model for describing the spin dynamics of Mn (C<sub>18</sub>H<sub>35</sub>O<sub>2</sub>)<sub>2</sub>.
- Artikel-Typen
- Forschungsartikel