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Study of Boundary Free Tb-Dy-Fe Magnetostrictive Materials

Published online by Cambridge University Press:  16 February 2011

Qiang Li ,
Y.L. Chang ,
Shixi Ouyang  and
R.Z. Yuan
Qiang Li
Affiliation:
Wuhan University of Technology. Advanced Materials Research Institute, Wuhan, Hubei 430070, China
Y.L. Chang
Affiliation:
Wuhan University of Technology. Advanced Materials Research Institute, Wuhan, Hubei 430070, China
Shixi Ouyang
Affiliation:
Wuhan University of Technology. Advanced Materials Research Institute, Wuhan, Hubei 430070, China
R.Z. Yuan
Affiliation:
Wuhan University of Technology. Advanced Materials Research Institute, Wuhan, Hubei 430070, China
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Abstract

As a promising candidate of advanced smart materials Tb-Dy-Fe system has been studied for many years. It is well known that the boundaries (which exist in polycrystal and grain oriented crystals of magnetostrictive materials) heavily hinder the motion of domain walls. Therefore to eliminating those boundaries will improve their magnetostrictive behaviors to a large extent. A single crystal growth method (which is called: growth with magnetic levitation cold crucible in CZ technique) has been successfully developed in our lab. since a few years ago. Now bulk cubic Laves phase RFe2 TbxDy1-xFe1.95–2.0 single crystals with boundary free structure can be prepared. Studies have been focused on comparing the performances of polycrystal, grains oriented crystal with a single crystal of the same composition. Some results indicate that λs and d33 performed by the single crystal are much higher than the two former materials under the same conditions.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 360 , 1994 , 183
Copyright
Copyright © Materials Research Society 1995

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