Magnetostriction of TbxDy0.9−xNd0.1(Fe0.8Co0.2)1.93 compounds and their composites (0.20⩽x⩽0.60)

• Published in: Journal of alloys and compounds 2014, Vol.582, p.583-587
• Main Authors: Yin, H.Y., Liu, J.J., Pan, Z.B., Liu, X.Y., Liu, X.C., Liu, L.D., Du, J., Si, P.Z.
• Format: Article
• Language: English
• Subjects: Alloys; Anisotropy; Bonding; Compensation; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Laves phase; Magnetic fields; Magnetic properties; Magnetic properties and materials; Magnetocrystalline anisotropy; Magnetomechanical and magnetoelectric effects, magnetostriction; Magnetostriction; Magnetostrictive composites; Physics; Polymer matrix composites
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2013.08.092

•The easy magnetization direction is detected by X-ray diffraction on magnetic-field aligned powders.•Anisotropy compensation has been realized for the TbxDy0.9−xNd0.1(Fe0.8Co0.2)1.93 alloys.•The strong 〈111〉-oriented 1–3 epoxy-bonded composite has been fabricated. The structure, spin configuration, magnetocrystalline anisotropy compensation, magnetic properties, and magnetostriction of TbxDy0.9−xNd0.1(Fe0.8Co0.2)1.93 (0.20⩽x⩽0.60) alloys are investigated. The easy magnetization direction (EMD) at room temperature rotates from the 〈100〉 axis (x⩽0.25) to the 〈111〉 axis (x⩾0.30) with increasing Tb content, subjected to the anisotropy compensation between Tb3+ and Dy3+ ions. The analysis of X-ray diffraction, EMD and magnetostriction show that TbxDy0.9−xNd0.1(Fe0.8Co0.2)1.93 is an anisotropy compensation system and the compensation point is realized around x=0.30. The Laves phase compound Tb0.4Dy0.5Nd0.1(Fe0.8Co0.2)1.93 has a large spontaneous magnetostriction, the coefficient λ111 up to about 1640ppm. The epoxy bonded 0–3 and pseudo-1–3 composites were fabricated by curing without and with a magnetic field. A high magnetostriction, longitudinal λ|| and linear anisotropic λa(= λ||−λ⊥) up to around 390 and 650ppm at 6 kOe, respectively, is obtained for the grain 〈111〉-oriented pseudo-1–3 epoxy/Tb0.4Dy0.5Nd0.1(Fe0.8Co0.2)1.93 composite with 20vol% alloy particles.