CRYSTAL STRUCTURE AND MAGNETIC PROPERTIES OF BI0.267PR0.733SRO3-DELTA VIA NEUTRON DIFFRACTION

摘要

The crystal structure of Bi0.267Pr0.733SrO2.963 has been refined based on neutron powder diffraction data (monoclinic system, P12(1)1 space group, a=5.9728(2) Angstrom, b=6.1143(2) Angstrom, c=8.5308(3) Angstrom, beta=89.92(1)degrees at T=300 K). A nonhomogeneous occupation of atomic positions has been obtained. Down to T=1.4 K, no magnetic ordering has been observed on Bi0.267Pr0.733SrO2.963 neutron ponder diffraction diagrams. This result is consistent with the AC-susceptibility vs T curve, which shows paramagnetic behavior down to 4.2 K. (C) 1997 Academic Press. [References: 11]