Spin alternation in one-dimensional exchange-coupled systems: Magnetic behaviour of the ( {1}/{2}-1) N chain
Abstract
We report on the magnetic behaviour of exchange-coupled closed chains (rings) of increasing length made of two alternating spin sublattices S a = {1}/{2}, S b = 1 . Taking into account the geometrical and spin space symmetries of such syste the problem is shown to be tractable up to 10 spins for distinct values of the ga/ gb ratio between Landé factors; the results are discussed for an antiferromagnetic coupling. The limiting behaviour for the infinite chain is determined by extrapolation of the data obtained for finite rings. At very low temperatures, the analogy with the regular S = {1}/{2} ferromagnetic chain is underlined.
- Publication:
-
Physics Letters A
- Pub Date:
- July 1983
- DOI:
- 10.1016/0375-9601(83)90327-4
- Bibcode:
- 1983PhLA...96..413D