Presentation
Magnetic anisotropy and phase transitions in single-crystal Tb5(Si2.2Ge1.8)
Ames Laboratory Conference Papers, Posters, and Presentations
Document Type
Conference Proceeding
Disciplines
Conference
49th Annual Conference on Magnetism and Magnetic Materials
Publication Date
5-16-2005
DOI
10.1063/1.1855196
Geolocation
(30.3321838, -81.65565099999998)
Abstract
The Tb5(SixGe4−x) alloy system has many features in common with the Gd5(SixGe4−x)system although it has a more complex magnetic and structural phase diagram. This paper reports on the magnetic anisotropy and magnetic phase transition of single-crystalTb5(Si2.2Ge1.8) which has been investigated by the measurements of M-H and M-T along the a, b, and c axes. The variation of 1/χ vs T indicates that there is a transition from paramagnetic to ferromagnetic at Tc = 110 K. Below this transition temperature M-Hcurves show very strong anisotropy, and it is believed that this is due to the 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. The magnetic properties of this material are therefore very different from those of the related Gd5Si2Ge2 system, in which the b axis was found to be the easy axis and the magnitude of the anisotropy was smaller.
Copyright Owner
American Institute of Physics
Copyright Date
2005
Language
en
Citation Information
M. Han, J. E. Snyder, W. Tang, Thomas A. Lograsso, et al.. "Magnetic anisotropy and phase transitions in single-crystal Tb5(Si2.2Ge1.8)" Jacksonville, FL(2005) Available at: http://works.bepress.com/thomas_lograsso/143/
Copyright 2005 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
This article is from Journal of Applied Physics 97 (2005): 10M313 and may be found at http://dx.doi.org/10.1063/1.1855196.