Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 323, Issue 24, Pages 3189-3197Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2011.07.004
Keywords
Rare earth intermetallics; Neutron diffraction; Magnetic structure
Funding
- Institute Laue-Langevin [5-31-1993, 5-31-1521]
- Russian Fund for Basic Research [09-03-00173-a]
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Neutron diffraction study has been performed on the Tb5Sb3 and Tb5Si1.5Sb1.5 compounds (hexagonal Mn5Si3-type, hP16, P6(3)/mcm) to understand their magnetic structures. The temperature dependence of neutron diffraction results proves that these intermetallics show a complex magnetic ordering. The Tb5Sb3 presents five subsequent changes in magnetic structure at similar to 150, 119, 85, 70 and 54 K on cooling: paramagnet -> antiferromagnetic flat spiral -> ferromagnetic cone -> antiferromagnetically canted ferromagnetic cone -> canted AF -> sine modulated AF. The Tb5Si1.5Sb1.5 shows two subsequent changes in magnetic structure at 123 and 66 K: paramagnet -> sine modulated antiferromagnet I -> sine modulated antiferromagnet II. The Tb5Si3, Tb5Sb3 and Tb5Si1.5Sb1.5 have the different magnetic structure in the full temperature range. (C) 2011 Elsevier B.V. All rights reserved.
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