J. Richter et al., PHASE-TRANSITIONS IN 2-LAYER SPIN 1 2 ANTIFERROMAGNETS WITH COMPETINGINTRA-LAYER AND INTER-LAYER COUPLINGS/, Journal of magnetism and magnetic materials, 156(1-3), 1996, pp. 433-434
We study the phase diagram of layered spin 1/2 antiferromagnets with l
ong-range and short-range inter-layer coupling. We discuss quantum dis
order in the short-range model and order from disorder phenomena in th
e long range model.