High magnetostriction at low fields of epoxy/Tb1-xPrx (Fe0.4Co0.6 )1.9 composites

• Published in: Journal of alloys and compounds Vol. 427; no. 1-2; pp. 271 - 274
• Main Authors: LIU, J. J, XIONG, D. K, REN, W. J, ZHANG, Z. D, OR, S. W
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier 01.01.2007
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Magnetic properties and materials; Magnetomechanical and magnetoelectric effects, magnetostriction; Physics; Cubic lattices; Annealing; Curie point; Magnetostriction; MgCu2-type structure; Melt-spinning; Magnetic properties; Magnetostrictive composite material; Magnetization; Magnetostriction; Epoxy resin; Melt spinning; Iron alloys; Low field; Lattice parameters; Terbium alloys; Composite materials; Praseodymium alloys; Magnetic anisotropy; Rare earth alloys; Laves phases; Cobalt alloys; 75.80.+q; 74.25.Ha; Transition element alloys
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2006.03.068

High Pr-content Tb1-xPrx(Fe0.4Co0.6)1.9 magnetostrictive alloys (0.7 < =x < =1.0) with a single cubic Laves phase have been synthesized by melt-spinning and subsequent annealing processes. The lattice parameter and the magnetization of the Tb1-xPrx(Fe0.4Co0.6)1.9 Laves phase increase while the Curie temperature, the magnetocrystalline anisotropy, and the spontaneous magnetostriction coefficient lambda111 decrease with increasing Pr-content. The characteristic of the magnetostriction lambdaa=lambda-lambda of the epoxy/Tb1-xPrx(Fe0.4Co0.6)1.9 composites can be well understood by the spontaneous magnetostriction lambda111 and the magnetocrystalline anisotropy of the Tb1-xPrx(Fe0.4Co0.6)1.9 alloys. The epoxy/Pr(Fe0.4Co0.6)1.9 composite free of high-cost Tb has a high magnetostriction of about 500ppm at 6kOe, suggesting that it would be a promising magnetostrictive composite material for low field application.