Effect of Zr, V, Nb, Mo, and Ta substitutions on magnetic properties and microstructure of melt-spun SmCo5 magnets

Tomokazu Fukuzaki; Hiroaki Iwane; Kazutomo Abe; Toshihiro Doi; Ryuji Tamura; Tadaaki Oikawa

doi:10.1063/1.4868501

Effect of Zr, V, Nb, Mo, and Ta substitutions on magnetic properties and microstructure of melt-spun SmCo₅ magnets

J Appl Phys. 2014 May 7;115(17):17A760. doi: 10.1063/1.4868501. Epub 2014 Mar 17.

Authors

Tomokazu Fukuzaki, Hiroaki Iwane, Kazutomo Abe, Toshihiro Doi, Ryuji Tamura, Tadaaki Oikawa

Abstract

We have investigated effects of metal substitutions on the magnetic properties and microstructure of melt-spun Sm-Co-Cu-Fe-M (M = Zr, V, Nb, Mo, Ta) magnets. We prepared melt-spun ribbons with compositions of Sm(Co_1-_x Cu _x )₅Fe_0.54-_y M _y (x = 0.1-0.5, y = 0-0.43, M = Zr, V, Nb, Mo, Ta). For compositions of Sm(Co_1-_x Cu _x )₅Fe_0.54 (x = 0.1-0.5), coercivity increased with increasing of annealing temperature, and a high coercivity of 17.6 kOe was obtained at a Cu content of x = 0.3. The coercivity was found to increase with increasing melting point of the substitution element. A high coercivity of 24.5 kOe was obtained for a composition of Sm(Co_0.7Cu_0.3)₅Fe_0.34Ta_0.2.