Field-Induced Order in Heavy-Fermion Compound Yb$Co_{2}$$Zn_{20}$
Résumé
The field-induced ordered phase of heavy-fermion compound Yb$Co_{2}$$Zn_{20}$ was investigated by means of single crystal neutron diffraction. At an applied field of 11.8 T along the [1$\bar 1$1] direction, a superlattice peak was found at ($\bar 3$/2 $\bar 1$/2 1/2) at 200 mK, whereas no peak was detected at q = (1 0 0). In addition, broad diffuse scattering was revealed around induced superlattice peak. The present result evidences that the field-induced ordered phase has different character to the pressure induced antiferromagnetic ordered phase.