Lattice dynamics and a magnetic-structural phase transition in the nickel orthoborate $N{i}_3(B{O}_3{)}_2$

R. V. Pisarev, M. A. Prosnikov, V. Yu. Davydov +7

Nickel orthoborate $N{i}_3(B{O}_3{)}_2$ having a complex orthorhombic structure $P_{nnm}$ (#58, Z=2) of the kotoite type is known for quite a long time as an antiferromagnetic mate…