Nuclear Magnetic Resonance of Cu Nuclei in CsCuCl₃–A Screw Spin Arrangement in the Ordered State–

Abstract

The NMR of copper nuclei in CsCuCl 3 has been studied at 1.77 K. NMR lines of Cu 63 nuclei were observed at 169.2 MHz with two satellite lines equally split by the quadrupole interaction. The analyses of the hyperfine field and the quadrupole splitting give that the spin direction of the Cu 2+ ions is parallel to the local z -axis. Since the local z -axes have a helical nature along the c -axis, a screw spin arrangement at the ordered state is verified from the NMR results.