Structure and magnetism of the layered ruthenocuprate Pb2RuSr2Cu2O8Cl -: art. no. 172506

The crystal structure and magnetism of the layered ruthenocuprate Pb2RuSr2Cu2O8Cl have been studied. A powder neutron diffraction study reveals that the crystal structure is tetragonal (space group P4/mmm, a=3.866 81(9) Angstrom, c=15.3699(8) Angstrom at 295 K) with disordered rotations and tilts of the RuO6 octahedra with no structural transitions down to 10 K. A magnetic transition to a canted antiferromagnetic state occurs at T-M=117 K, and the ordered Ru moment is 1.1(1)mu(B), at 10 K from Rietveld analysis of neutron data. A spin-flop or metamagnetic transition is observed above a field of 0.5 T, and the saturated ferromagnetic Ru moment is 0.5mu(B)-0.8mu(B). The sample is not superconducting.