STUDY OF FRUSTRATION EFFECTS IN TWO-DIMENSIONAL TRIANGULAR LATTICE ANTIFERROMAGNETS - NEUTRON POWDER DIFFRACTION STUDY OF VX2, X equals Cl, Br AND I.

Article abstract of DOI:10.1143/JPSJ.52.1814

In order to study the frustration effects, powder diffraction patterns are studied of VX//2 (X equals Cl, Br and I) considered to be quasi-two-dimensional triangular lattice antiferromagnets. The spins in VCl//2, VBr//2 and VI//2 were found to order at 36. 0, 29. 5 and 16. 3 K respectively forming a three sublattice structure in the basal plane. No critical scattering characteristic for 2D could be seen but the temperature variation of sublattice magnetization is rather close to that for the Ising system.