Title :
Phase transitions in single-crystal Tb5Si2.2Ge1.8
Author :
Ring, A.P. ; Ziegler, H.L. ; Lograsso, T. ; Schlagel, D. ; Snyder, J.E. ; Jiles, D.C.
Author_Institution :
Mater. & Eng. Phys. Program, Iowa State Univ., Ames, IA, USA
Abstract :
The magnetic anisotropy and magnetic phase transition of a single crystal Tb5(Si2.2Ge1.8) is investigated by of M-H and M-T measurements along the a, b and c axes. The transition from paramagnetic to ferromagnetic is observed at T = 110 K . Below this transition temperature, M-H curves show very strong anisotropy which is believed to be due to complex spin configuration. M-H measurements at T = 110 K show that the a axis is the easy axis, and that the saturation magnetization is 200 emu/g. The b axis is the hard axis, which needs an external magnetic field much higher than 2 T to saturate the magnetization in that direction, indicating a high magnetocrystalline anisotropy. The c axis is of intermediate hardness.
Keywords :
Ge-Si alloys; ferromagnetic-paramagnetic transitions; magnetic anisotropy; magnetic structure; magnetic transition temperature; terbium alloys; M-H curves; M-T curves; Tb5Si2.2Ge1.8; a axis; b axis; c axis; easy axis; hard axis; magnetic anisotropy; magnetic phase transition; magnetization saturation; magnetocrystalline anisotropy; paramagnetic-ferromagnetic transition; saturation magnetization; single crystal; spin configuration; Anisotropic magnetoresistance; Magnetic anisotropy; Magnetic field measurement; Magnetic materials; Magnetic properties; Magnetic separation; Magnetostriction; Perpendicular magnetic anisotropy; Saturation magnetization; Temperature;
Conference_Titel :
Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International
Print_ISBN :
0-7803-9009-1
DOI :
10.1109/INTMAG.2005.1464267
