On the ac magnetic susceptibility of spin-chains: solitons in one-dimensional systems
S. A. Pikin, Z. Tomkowicz+, E. S. Pikina*, W. Haase∇
Shubnikov' Institute of Crystallography RAS, 119333 Moscow, Russia
+Institute of Physics, Jagiellonian University, 30-059 Krakow, Poland
*Institute for Problems of Oil and Gas RAS, 119333 Moscow, Russia
∇Institut für Physikalische Chemie, Technische Universität Darmstadt, 64287 Darmstadt, Germany
PACS: 75.10.Pq, 75.30.Cr
Abstract
It is shown that relatively simple phenomenological considerations
of the motion of thermally activated solitons (kinks of various types) in the
single spin chains can explain and describe qualitatively and quantitatively
the temperature and frequency behaviour of magnetic susceptibility in ac
magnetic fields. The comparison of experimental data and theoretical results
allows estimate the number of solitons and "weak" places in correlation
regions of a sample.