Condensed Matter Physics, 2005, vol. 8, No. 1(41), p. 15-24, English

Title: Ising antiferromagnet with mobile, pinned, and quenched defects
Authors: W.Selke, M.Holtschneider, R.Leidl (Institut für Theoretische Physik, Technische Hochschule, 52056 Aachen, Germany)

Motivated by recent experiments on (Sr,Ca,La)14Cu24O41, a two-dimensional Ising antiferromagnet with mobile, locally pinned and quenched defects is introduced and analyzed using mainly Monte Carlo techniques. The interplay between the arrangement of the defects and the magnetic ordering as well as the effect of an external field are studied.

Key words: Ising model, randomness, Monte Carlo, cuprates
PACS: 05.10.Ln, 05.50+q, 74.72.Dn, 75.10.Hk

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