Magnetomechanical properties and anisotropy compensation in quaternary rare earth-iron materials of the type TbxDyyHozFe2

Simon Busbridge, A.R. Piercy

Research output: Contribution to journalArticle

Abstract

The static and dynamic magnetomechanical properties, in the temperature range -60°C to +100°C, of quaternary compositions of the type TbxDyyHozFe2 (x+y+z=1) which have K1 close to zero at +20°C are presented. The maximum room temperature values of d33 (7.9 nm A-1) and k33(0.62) are achieved for Tb0.20 Dy0.22Ho0.58Fe2, the composition for which K2 is also close to zero at +20°C. Calculations performed with an anisotropy model including an eighth-order term show a 20 fold decrease in the anisotropy of Tb0.20Dy0.22Ho0.58Fe2 in comparison with Terfenol-D. This decrease is not as effective in improving material performance as the opposing influence of the reduction in saturation magnetostriction
Original languageEnglish
Pages (from-to)4044-4046
Number of pages3
JournalIEEE transactions on magnetics
Volume31
Issue number6
Publication statusPublished - 1 Jan 1995

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