An investigation of the magnetic properties of Sm1-xTiO3 for x = 0.03, 0.05, and 0.10: Magnetic structure determination of Sm0.97TiO3 by short-wavelength neutron diffraction on single crystals

Single crystals of Sm0.97TiO3 have been prepared and their magnetic propert ies have been investigated. Dc magnetic susceptibility measurements indicat e paramagnetic Curie-Weiss behavior above 100 K whereas two magnetic transi tions are observed at TN similar to 52 K and T-N similar to 40 K, Similar o bservations for antiferromagnetic behavior have been made for the x = 0.05 compound with T-N similar to 40 K whereas for the x = 0.10 compound this be havior vanishes. The magnetic structure determination of the x = 0.03 compo und has been accomplished by using low-temperature single-crystal neutron d iffraction, The room temperature crystal structure is a distorted orthorhom bic perovskite structure belonging to Pnma, which is preserved down to 15 K . The magnetic structure is found to be consistent with a G(x)G(y) moment c onfiguration on the Ti(III) sublattice and a C-z moment configuration on th e Sm(III) sublattice, The magnetic moments are estimated to be 0.72(1) and 0.43(1) mu(B) on the Ti(III) and Sm(III) sublattices, respectively. The ori entations of the moments were found to be 7(3)degrees to the x-asis for Ti( III) and 2(2)degrees to the z-axis for Sm(III). (C) 1998 Academic Press.