Magnetic properties of CeFeSi-type RTiSi compounds (R=Gd–Tm, Lu, Y) from magnetic measurements and neutron diffraction

• Published in: Journal of magnetism and magnetic materials 2002-04, Vol.246 (1), p.233-242
• Main Authors: Klosek, V., Vernière, A., Ouladdiaf, B., Malaman, B.
• Format: Article
• Language: English
• Subjects: Antiferromagnetics; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Magnetic measurements; Magnetic properties and materials; Magnetic structures; Neutron diffraction; Physics; Single-crystal and powder diffraction; Structure of solids and liquids; crystallography; Studies of specific magnetic materials; Ternary rare-earth titanium silicides; X-ray diffraction and scattering
• ISSN: 0304-8853
• DOI: 10.1016/S0304-8853(02)00060-4

Numerous solid-state syntheses clearly show that the CeFeSi-type (P4/nmm) RTiSi series is limited to the heaviest rare-earth elements (R=Gd–Tm, Lu, Y). Bulk magnetisation and neutron diffraction measurements have been performed on these compounds. YTiSi and LuTiSi are Pauli paramagnets whereas the R(=Gd–Tm)TiSi compounds behave antiferromagnetically below 400, 288, 175, 98, 51 and 20 K, respectively. The magnetic structure of the (Tb–Er)TiSi compounds consists of ferromagnetic (0 0 1) R layers antiferromagnetically coupled along the c-axis with the (++−−) coupling sequence. The three first compounds exhibit an easy-axis anisotropy whereas an easy plane prevails in ErTiSi. In all cases, the R moment value is close to the R 3+ value (gJ). The results are compared with those obtained on the corresponding RTiGe germanides.