Structure and magnetic properties of RCo7−xMnx alloys (R=Sm, Gd; x=0.1–1.4)

Structure and magnetic properties of RCo7−xMnx alloys (R=Sm, Gd; x=0.1–1.4)
M. Gjoka, , a, b, O. Kalogirouc, C. Sarafidisc, D. Niarchosb and G. C. Hadjipanayisd
a Department of Physics, University of Ioannina, 45110 Ioannina, Greece
b Institute for Materials Science, NCSR “Demokritos”, 153 10 Ag. Paraskevi, Attiki, Greece
c Department of Physics, Aristotle University of Thessaloniki, 54 006 Thessaloniki, Greece
d Department of Physics and Astronomy, University of Delaware, Newark, DE 19716-2570, USA
Available online 24 December 2001.

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Abstract
Alloys with starting stoichiometry RCo7−xMnx (R=Sm, Gd; x=0.1–1.4) were prepared by arc melting. The effect of Mn doping on the formation of the TbCu7-type structure and magnetic properties are studied. The SmCo7−xMnx as cast alloys with x<0.4 present uniaxial anisotropy along the c-axis as determined by X-ray diffraction on magnetically oriented samples.
Author Keywords: Rare earth transition metal compounds; Structure; Magnetic properties; Magnetocrystalline anisotropy