Phonon-induced quadrupolar ordering of the magnetic superconductor TmNi${}_2$B${}_2$C

N. H. Andersen, J. Jensen, T. B. S. Jensen +6

We present synchrotron x-ray diffraction studies revealing that the lattice of thulium borocarbide is distorted below T_Q = 13.5 K at zero field. T_Q increases and the amplitude of…