Orbital and Spin Order in the Triangular S = 1/2 Layered Compound (Li,Na)NiO₂

Abstract

NUNEZ-REGUEIRO, M. D.; CHOUTEAU, G.; Front. Magn. Mater. 2005, 247-272; High Magn. Field Lab., MPI, CNRS, F-38042 Grenoble, Fr.; Eng.) -Schramke 52-208

Exploring Magnetic XY Behavior in a Quasi-2D Anisotropic Triangular Lattice of Cu(II) by Functionalized Graphene

“…Of the three spins on a triangle, two are antiparallel, and the third one is noncollinearly aligned with respect to the antiparallel spins (Figure a) . In addition to spin ordering, highly aligned d x 2 – y 2 orbitals along the Cu2 sites (those at the Cu1 sites are inclined at an angle of 45° and do not share the same plane) could bring orbital ordering. ,− Such an anisotropic orbital arrangement within 2D spin–lattice indicates the presence of high anisotropy for the Cu2 chains compared to Cu1 chains thus rendering the material an antiferromagnet even after experiencing spin flop (Figure S7). Similar magnetic response was observed earlier for pristine Bo and attributed to spin flop transition; however, Cu­(II) sites experiencing spin flop were not assigned .…”