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Magnetic order of Mn5Si3-type Tb5Sb3 and Tb5Si1.5Sb1.5 |
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| Authors: | A.V. Morozkin O. Isnard |
| Affiliation: | a Department of Chemistry, Moscow State University, Leninskie Gory, House 1, Building 3, Moscow, GSP-2, 119992, Russia b Institut Laue-Langevin, 6 Rue J. Horowitz , 38042 Grenoble, France c Institut Néel du CNRS et Université J.Fourier, rue des martyrs BP166X, 38042 Grenoble, France |
| Abstract: | Neutron diffraction study has been performed on the Tb5Sb3 and Tb5Si1.5Sb1.5 compounds (hexagonal Mn5Si3-type, hP16, P63/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 ∼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. |
| Keywords: | Rare earth intermetallics Neutron diffraction Magnetic structure |
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