MAGNETIC-FIELD-INDUCED LONG-RANGE ANTIFERROMAGNETIC ORDER IN 2-DIMENSIONAL FRUSTRATED SPIN-1 2 SYSTEMS/

It is generally believed that in frustrated two-dimensional spin-1/2 a ntiferromagnets the long-range antiferromagnetic order may be absent b ecause of quantum spin fluctuations. A relatively weak magnetic field may induce the canted antiferromagnetic ordering instead of the usual one-sublattice magnetic ordering. (C) 1995 American Institute of Physi cs.