کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1799678 | 1524856 | 2014 | 8 صفحه PDF | دانلود رایگان |
• A TbFe5Al7 single crystal is studied in static and pulsed magnetic fields.
• A spin-reorientation transition occurs in the basal plane of the tetragonal lattice.
• TbFe5Al7 displays field-induced transitions along the easy magnetization direction.
• Tb–Fe inter-sublattice exchange constant has been determined.
Magnetization and ultrasound measurements have been performed on a TbFe5Al7 single crystal (tetragonal crystal structure) in the temperature range from 2 to 260 K in steady magnetic fields up to 18 T and in pulsed magnetic fields up to 60 T. The compound is a ferrimagnet (TC=242 K) having an easy-plane anisotropy. Strong anisotropy is also present within the basal plane. At 2 K, the easy magnetization direction is the [1 0 0] axis. In the vicinity of the compensation temperature, Tcomp=84 K, TbFe5Al7 displays a spin-reorientation transition from [1 0 0] to the [1 1 0] axis accompanied by pronounced anomalies in the relative sound-velocity change and sound attenuation. Further, field-induced magnetic transitions have been observed in TbFe5Al7 by magnetization and acoustic measurements. Step-wise rotation of the magnetic moments with a wide hysteresis occurs for fields applied along the [1 0 0] axis at T
Journal: Journal of Magnetism and Magnetic Materials - Volume 365, September 2014, Pages 56–63