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The Microstructure and Magnetic Properties of TbDyHo (FeMn)1.95 Alloys

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Abstract:

The composition dependence of crystal structure, lattice parameter, micromorphology, Curie temperatures, magnetocrystalline anisotropy constant of Tb0.29Dy0.48Ho0.23(Fe1-XMnX)1.95 (x0.3) alloys were investigated by the experiment. X-ray diffraction patterns demonstrate the Tb0.29Dy0.48Ho0.23(Fe1-XMnX)1.95 (x0.3) alloys possess MgCu2-type cubic Laves structure. The lattice parameter of Tb0.29Dy0.48Ho0.23(Fe1-XMnx)1.95 alloy increases with increasing of x value. The Curie temperature Tc decreases from 375°C for x=0 to 316 °C for x=0.05, 265°C for x=0.1. The magnetocrystalline anisotropy constant K1 of Tb0.29Dy0.48Ho0.23(Fe1-xMnx)1.95 (x0.3) decreases slightly with the increasing of x value. The magnetostriction was examined under applied magnetic field H in the room temperature. The Tb0.29Dy0.48Ho0.23(Fe1-xMnx)1.95 (x0.2) alloys have the character of giant magnetostrictive in room temperature. With the increasing of Mn concentration, the magnetostrictive of Tb0.29Dy0.48Ho0.23(Fe1-xMnx)1.95 (x0.2) alloy decreased.

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Periodical:

Advanced Materials Research (Volumes 791-793)

Pages:

452-455

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.791-793.452

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Online since:

September 2013

Authors:

Qi Feng Lin, Hong Bo Zhang

Keywords:

Magnetocrystalline Anisotropy, Magnetostriction, TbDyHo (FeMn)1.95 Alloys

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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