Magnetic amorphous Co-Cd powders prepared by mechanical alloying

Pekka Ruuskanen, B. Schwarz, J. Thompson

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)47-56
Number of pages10
JournalPhilosophical Magazine B: Physics of Condensed Matter, Electronic, Optical and Magnetic Properties
Volume69
Issue number1
DOIs
Publication statusPublished - 1994
MoE publication typeA1 Journal article-refereed

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