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Proceedings Paper

Magnetostriction and hysteresis of (Tb0.36Dy0.64)1-xHoxFe1.95 alloys
Author(s): Hongbo Zhang; Chengbao Jiang; Tianli Zhang; Huibin Xu
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Paper Abstract

The crystal structure, lattice constant, Curie temperatures, spin reorientation temperature, magnetization, magnetocrystalline anisotropy constant and magnetostriction of (Tb0.36Dy0.64)1-xHoxFe2 (x=0.1, 0.2, 0.3) alloys were investigated. X-ray diffraction patterns demonstrate all the (Tb0.36Dy0.64)1-xHoxFe2 alloys possess MgCu2-type cubic Laves structure. The Curie temperature Tc of (Tb0.36Dy0.64)1-xHoxFe1.95 alloys decreases slightly from 387°C for Tb0.36Dy0.64Fe2 to 379°C for x=0.1, 375°C for x=0.2 and 362°C for x=0.3. The spin reorientation temperature Tr increases from -94.1°C for Tb0.36Dy0.64Fe2 to -57°C for x=0.1 and -51°C for x=0.2. The magnetocrystalline anisotropy coefficient K1 of (Tb0.36Dy0.64)1-xHoxFe2 alloys decreases with increasing Ho concentration. The magnetostriction of (Tb0.36Dy0.64)1-xHoxFe1.95 alloys was examined under applied magnetic field H (00.36Dy0.64)1-xHoxFe2 alloys (x≤0.2) have the character of giant magnetostrictive in a wide operating temperature range from -60°C to 80°C. The hysteresis of magnetostriction versus the applied field was reduced due to the addition of Ho concentration. Small amounts of Ho (x≤0.2) replacing Tb and Dy in the (Tb0.36Dy0.64)1-xHoxFe2 formulation provide a much larger decrease in hysteresis losses with relatively small changes of magnetostriction in wide operating temperature range between -60°C and 80°C at magnetic field of 100mT.

Paper Details

Date Published: 1 November 2007
PDF: 7 pages
Proc. SPIE 6423, International Conference on Smart Materials and Nanotechnology in Engineering, 64231K (1 November 2007); doi: 10.1117/12.779603
Show Author Affiliations
Hongbo Zhang, Beijing Univ. of Aeronautics and Astronautics (China)
Chengbao Jiang, Beijing Univ. of Aeronautics and Astronautics (China)
Tianli Zhang, Beijing Univ. of Aeronautics and Astronautics (China)
Huibin Xu, Beijing Univ. of Aeronautics and Astronautics (China)


Published in SPIE Proceedings Vol. 6423:
International Conference on Smart Materials and Nanotechnology in Engineering

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