Evidence of nickel ions dimerization in NiWO${}_4$ and NiWO${}_4$-ZnWO${}_4$ solid solutions probed by EXAFS spectroscopy and reverse Monte Carlo simulations

G. Bakradze, A. Kalinko, A. Kuzmin

The existence of exchange-coupled Ni${}^{2+}$ ions -- the so-called magnetic dimers -- in wolframite-type NiWO${}_4$ and Zn${}_c$Ni${}_{1-c}$WO${}_4$ solid solutions with high nickel content…