Publication Type
Journal
Journal Name
Physical Review Letters
Publication Date
Page Number
147201
Volume
119
Issue
14
Abstract
Inelastic neutron scattering measurements on the itinerant antiferromagnet CaCo2−yAs2 at a temperature of 8 K reveal two orthogonal planes of scattering perpendicular to the Co square lattice in reciprocal space, demonstrating the presence of effective one-dimensional spin interactions. These results are shown to arise from near-perfect bond frustration within the J1−J2 Heisenberg model on a square lattice with ferromagnetic J1 and hence indicate that the extensive previous experimental and theoretical study of the J1−J2 Heisenberg model on local-moment square spin lattices should be expanded to include itinerant spin systems.
