Observation of Field-Induced Transverse Néel Ordering in the Spin Gap System TlCuCl${}_3$

H. Tanaka, A. Oosawa, T. Kato +4

Neutron elastic scattering experiments have been performed on the spin gap system TlCuCl${}_3$ in magnetic fields parallel to the $b$-axis. The magnetic Bragg peaks which indicate th…