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

被引:24
作者
Amow, G
Greedan, JE
Ritter, C
机构
[1] McMaster Univ, Dept Chem, Hamilton, ON L8S 4M1, Canada
[2] McMaster Univ, Brockhouse Inst Mat Res, Hamilton, ON L8S 4M1, Canada
[3] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France
关键词
D O I
10.1006/jssc.1998.7989
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Single crystals of Sm0.97TiO3 have been prepared and their magnetic properties have been investigated. Dc magnetic susceptibility measurements indicate paramagnetic Curie-Weiss behavior above 100 K whereas two magnetic transitions are observed at TN similar to 52 K and T-N similar to 40 K, Similar observations 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 behavior vanishes. The magnetic structure determination of the x = 0.03 compound has been accomplished by using low-temperature single-crystal neutron diffraction, The room temperature crystal structure is a distorted orthorhombic 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 configuration on the Ti(III) sublattice and a C-z moment configuration on the 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 orientations 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.
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页码:262 / 269
页数:8
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