Magnetic field induced ordering in quasi-one-dimensional quantum magnets
Department of Physics and Astronomy, University of Southern California, Los Angeles, CA 90089-0484, USA
Corresponding author: a firstname.lastname@example.org
Published online: 15 August 2000
Three-dimensional magnetic ordering transitions are studied theoretically in strongly anisotropic quantum magnets. An external magnetic field can drive quasi-one-dimensional subsystems with a spin gap into a gapless regime, thus inducing long-range three-dimensional magnetic ordering due to weak residual magnetic coupling between the subsystems. Compounds with higher spin degrees of freedom, such as N-leg spin-1/2 ladders, are shown to have cascades of ordering transitions. At high magnetic fields, zero-point fluctuations within the quasi-1D subsystems are suppressed, causing quantum corrections to the ordering temperature to be reduced.
PACS: 75.10.Jm – Quantized spin models / 75.30.-m – Intrinsic properties of magnetically ordered materials / 75.50.Ee – Antiferromagnetics
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000