An Investigation of the Magnetic Properties of Sm1−xTiO3forx=0.03, 0.05, and 0.10: Magnetic Structure Determination of Sm0.97TiO3by Short-Wavelength Neutron Diffraction on Single Crystals
✍ Scribed by G. Amow; J.E. Greedan; C. Ritter
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 365 KB
- Volume
- 141
- Category
- Article
- ISSN
- 0022-4596
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✦ Synopsis
Single crystals of Sm 0.97 TiO 3 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 T N &52 K and T N &40 K. Similar observations for antiferromagnetic behavior have been made for the x ؍ 0.05 compound with T N &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 lowtemperature 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) B on the Ti(III) and Sm(III) sublattices, respectively. The orientations of the moments were found to be 7(3)°°to the x-axis for Ti(III) and 2(2)°°to the z-axis for Sm(III).