Spin-wave excitations in finite chain segments of the diluted one-dimensional Heisenberg antiferromagnet CsM{n_{1 - x}}M{g_x}B{r_3} |
| |
Authors: | A Furrer H-U Güdel |
| |
Institution: | Laboratory for Neutron Scattering, Eidgen?ssische Technische Hochschule Zürich and Paul Scherrer Institut, 5232, Villigen PSI, Switzerland Department of Chemistry, Universit?t Bern, Freiestrasse 3, 3000, Bern 9, Switzerland
|
| |
Abstract: | The inelastic neutron scattering technique was employed to study the magnetic excitation spectra in the diluted one-dimensional
Heisenberg antiferromagnet CsMn1-xMgxBr3 (x
=0, 0.05, 0.10, 0.25, 0.50). The spectral response is interpreted in terms of spin-wave excitations in finite chain segments
of Mn2+ ions, which are found to exist as long as the chain length exceeds twice the wavelength of the spin excitation. This limit
determines the crossover into the mesoscopic regime.
Received 31 December 1999 |
| |
Keywords: | PACS 75 30 Ds Spin waves - 75 40 Gb Dynamic properties (dynamic susceptibility spin waves spin diffusion dynamic scaling etc ) - 75 50 Ee Antiferromagnetics |
本文献已被 SpringerLink 等数据库收录! |
|