Knight shift, hyperfine field, NMR frequency and magnetization of a Neel-type nickel single crystal

Abstract

The field dependence of the NMR line center frequency Ν of naturally abundant⁶¹Ni has been studied with Néel-type nickel single crystals at 4.2 K. For internal fields H_i lower than H_is, which is the field necessary for complete magnetic saturation, a nonlinear correlation between Ν and H_i was found due to changes of the orientation of the hyperfine field with H_i. For fields larger than H_is the linear variation lead to K=111.10⁻⁴ for the Knight shift. Using available susceptibility data, we find ξ_p=28.10⁻⁶ emu/mole and ξ_vv=92.10⁻⁶ emu/mole.