2 research outputs found
Magnetic phase diagram in three-dimensional triangular-lattice antiferromagnet SrCoTaO with small easy-axis anisotropy
We report the results of low-temperature magnetization and specific heat
measurements of SrCoTaO powder, in which Co ions with
effective spin-1/2 form a uniform triangular lattice in the plane. It was
found that SrCoTaO undergoes successive antiferromagnetic
transitions at and at zero magnetic field. As the magnetic field increases, both
and decrease monotonically. The obtained magnetic field vs
temperature phase diagram together with a sharp magnetization anomaly at a
saturation field of indicates that
SrCoTaO is described as a spin-1/2 three-dimensional
triangular-lattice antiferromagnet with a weak easy-axis anisotropy. We discuss
the characteristics of the magnetic phase diagram, which approximates the phase
diagram for the magnetic field perpendicular to the axis.Comment: 12 pages, 11 figures, accepted for publication in Phys. Rev.