Magnetostriction and hysteresis of (Tb0.36Dy0.64)1-xHoxFe1.95 alloys

Hongbo Zhang; Chengbao Jiang; Tianli Zhang; Huibin Xu

doi:10.1117/12.779603

1 November 2007 Magnetostriction and hysteresis of (Tb_0.36Dy_0.64)_1-xHo_xFe_1.95 alloys

Hongbo Zhang, Chengbao Jiang, Tianli Zhang, Huibin Xu

Proceedings Volume 6423, International Conference on Smart Materials and Nanotechnology in Engineering; 64231K (2007) https://doi.org/10.1117/12.779603
Event: International Conference on Smart Materials and Nanotechnology in Engineering, 2007, Harbin, China

Abstract

The crystal structure, lattice constant, Curie temperatures, spin reorientation temperature, magnetization, magnetocrystalline anisotropy constant and magnetostriction of (Tb_0.36Dy_0.64)_1-xHo_xFe₂ (x=0.1, 0.2, 0.3) alloys were investigated. X-ray diffraction patterns demonstrate all the (Tb_0.36Dy_0.64)_1-xHo_xFe₂ alloys possess MgCu₂-type cubic Laves structure. The Curie temperature T_c of (Tb_0.36Dy_0.64)_1-xHo_xFe_1.95 alloys decreases slightly from 387°C for Tb_0.36Dy_0.64Fe₂ to 379°C for x=0.1, 375°C for x=0.2 and 362°C for x=0.3. The spin reorientation temperature T_r increases from -94.1°C for Tb_0.36Dy_0.64Fe₂ to -57°C for x=0.1 and -51°C for x=0.2. The magnetocrystalline anisotropy coefficient K₁ of (Tb_0.36Dy_0.64)_1-xHo_xFe₂ alloys decreases with increasing Ho concentration. The magnetostriction of (Tb_0.36Dy_0.64)_1-xHo_xFe_1.95 alloys was examined under applied magnetic field H (00.36Dy_0.64)_1-xHo_xFe₂ 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 (Tb_0.36Dy_0.64)_1-xHo_xFe₂ 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.

Citation Download Citation

Hongbo Zhang, Chengbao Jiang, Tianli Zhang, and Huibin Xu "Magnetostriction and hysteresis of (Tb_0.36Dy_0.64)_1-xHo_xFe_1.95 alloys", Proc. SPIE 6423, International Conference on Smart Materials and Nanotechnology in Engineering, 64231K (1 November 2007); https://doi.org/10.1117/12.779603

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