ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Structural and magnetic properties of Sm(Co0.91−xFexCu0.07Zr0.02)8.0, where x=0, 0.12, 0.21, 0.29, and 0.32, and Sm(Co0.64Fe0.28Cu0.06Zr0.02)z, where z ranged from 6.9 to 8.6, have been systematically investigated by x-ray powder diffraction. It was found that most of these alloys exhibit a hexagonal Th2Ni17 structure with a space group P63/mmc after an optimum solid solution treatment with rapid quench. The fully processed materials (after precipitation hardening) all exhibit a rhombohedral Th2Zn17 structure with a space group of R3¯m as the primary phase. For Sm(Co0.91−xFexCu0.07Zr0.02)8.0, the lattice parameters, a and c, and cell volume, V, increase slightly at first with increasing x, and then more sharply when x is increased above 0.28. The latter drastic increase in lattice parameters and cell volume results in a sharp decrease in the Hci, Hc, and Hk values of fully processed materials. For Sm(Co0.64Fe0.28Cu0.06Zr0.02)z, the lattice parameters, a and c, and cell volume increase slightly when z is varied from 6.8 to 7.8, then exhibit a drastic decrease when z is further increased beyond 8.0. A Br of 11.3 kG, Hci of 27 kOe, and BHmax of 30 MGOe have been obtained on Sm(Co0.63Fe0.28Cu0.07Zr0.02)8.0 after a solid solution at 1160 °C and aging at 850 °C. © 1998 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.367935
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