TY - GEN
T1 - Effect of Fe, Cu, Zr and Ti on the magnetic properties of SmCo-1:7 magnets
AU - Venkatesan, M.
AU - Rhen, F. M.F.
AU - Gunning, R.
AU - Coey, J. M.D.
N1 - Publisher Copyright:
©2002 IEEE.
PY - 2002
Y1 - 2002
N2 - Nanocrystalline Sm-Co-Cu-Ti magnets prepared by mechanical milling and subsequent annealing were reported to exhibit excellent room temperature coercivity. In this study, investigations of the effects of Fe, Cu, Zr and Ti substitution on magnetic properties of 1:7 magnets at temperatures up to 450°C were investigated. The alloys with nominal composition SmCo6.6-x(Fe/Zr)xTi0.4 (x = 0.0, 0.1 and 0.2) and SmCo6.8-x/TixCu0.1Fe0.1 (x = 0.2, 0.3, 0.4) were prepared by arc melting in a high purity argon atmosphere. The alloy ingots were then crushed and milled for 12 h using high energy ball mill. The as-milled powders were annealed at 750°C for 2 hours. X-ray diffraction confirms the formation of TbCu7-type structure with minor amounts of the Tb2Zn17 rhombohedral phase. Grain size is ≈ 40 nm. The authors show the room temperature hysteresis loops of ball-milled SmCo-1:7 compositions with Fe and Zr doping. All compounds exhibit room temperature coercivity of more than 1 T. Substitution of Zr and Ti increases the room temperature coercivity whereas Fe substitution leads to an decrease of the magnetization but a decrease of the coercivity. A room temperature intrinsic coercivity of around 2.5 T is obtained for compositions SmCo6.4Zr0.2Ti0.4 and SmCo6.4Fe0.1Zr0.1Ti0.4.
AB - Nanocrystalline Sm-Co-Cu-Ti magnets prepared by mechanical milling and subsequent annealing were reported to exhibit excellent room temperature coercivity. In this study, investigations of the effects of Fe, Cu, Zr and Ti substitution on magnetic properties of 1:7 magnets at temperatures up to 450°C were investigated. The alloys with nominal composition SmCo6.6-x(Fe/Zr)xTi0.4 (x = 0.0, 0.1 and 0.2) and SmCo6.8-x/TixCu0.1Fe0.1 (x = 0.2, 0.3, 0.4) were prepared by arc melting in a high purity argon atmosphere. The alloy ingots were then crushed and milled for 12 h using high energy ball mill. The as-milled powders were annealed at 750°C for 2 hours. X-ray diffraction confirms the formation of TbCu7-type structure with minor amounts of the Tb2Zn17 rhombohedral phase. Grain size is ≈ 40 nm. The authors show the room temperature hysteresis loops of ball-milled SmCo-1:7 compositions with Fe and Zr doping. All compounds exhibit room temperature coercivity of more than 1 T. Substitution of Zr and Ti increases the room temperature coercivity whereas Fe substitution leads to an decrease of the magnetization but a decrease of the coercivity. A room temperature intrinsic coercivity of around 2.5 T is obtained for compositions SmCo6.4Zr0.2Ti0.4 and SmCo6.4Fe0.1Zr0.1Ti0.4.
UR - http://www.scopus.com/inward/record.url?scp=85017160115&partnerID=8YFLogxK
U2 - 10.1109/INTMAG.2002.1000704
DO - 10.1109/INTMAG.2002.1000704
M3 - Conference contribution
AN - SCOPUS:85017160115
T3 - INTERMAG Europe 2002 - IEEE International Magnetics Conference
BT - INTERMAG Europe 2002 - IEEE International Magnetics Conference
A2 - Fidler, J.
A2 - Hillebrands, B.
A2 - Ross, C.
A2 - Weller, D.
A2 - Folks, L.
A2 - Hill, E.
A2 - Vazquez Villalabeitia, M.
A2 - Bain, J. A.
A2 - De Boeck, Jo
A2 - Wood, R.
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2002 IEEE International Magnetics Conference, INTERMAG Europe 2002
Y2 - 28 April 2002 through 2 May 2002
ER -