Neutron Scattering Study of Successive Phase Transitions in Triangular Lattice Antiferromagnet CsNiCl₃

Abstract

Successive phase transitions of triangular lattice Heisenberg antiferromagnet with a small Ising anisotropy, CsNiCl₃, are studied by neutron scattering. We have reexamined the temperature dependences of the z and xy components of sublattice magnetizations and also measured the both components of staggered susceptibilities. The character of the transitions is orderings and divergences of the z and xy components at independent temperatures.