Magnetic amorphous Co-Gd powders prepared by mechanical alloying
- 1 January 1994
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine Part B
- Vol. 69 (1) , 47-56
- https://doi.org/10.1080/13642819408236878
Abstract
Amorphous Co1-xGdx powders with x = 0.10, 0.15, 0.20 and 0.25 were prepared by mechanically alloying mixtures of elemental cobalt and gadolinium powders in a laboratory high-energy ball mill. The alloys crystallize above 500°C. The magnetic properties of the amorphous powders were measured in toroidal samples made by cold pressing the powders. For x ⩽ 0.15, amorphous Co-Gd is ferromagnetic at all temperatures. In amorphous Co75 Gd25, the net magnetic moment has a minimum near the compensation temperature Tcom = 50°C, at which the cobalt and gadolinium spins align in opposite directions. The low-temperature magnetic moment of this alloy suggests that, on cooling, it forms a spin glass with a freezing temperature of 60K.Keywords
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