Abstract
The spontaneous magnetization (σ
0
,
T
) of a ferromagnetic may be deduced exclusively from the determination of magnetic isothermals, or in conjunction with magnetocaloric measurements. Values of σ
0,
T
of a nickel + copper alloy containing 30·75 at. % of copper have been obtained near its Curie temperature using both of these techniques and are shown to be in good agreement. Measurements of spontaneous magnetization and Curie temperature (
θ
f
) of nickel + copper alloys containing up to 54·11 at. % of copper using the purely magnetic techniques are described. These measurements were performed over a temperature range from
θ
f
down to 80 °K in all cases, and to 23 °K in the cases of alloys containing over 30 at. % of copper. The magnetic moments per atom (
p
B
) of the alloys, which are deduced from the measurements, vary linearly over a wide range of composition, extrapolating to
p
B
= 0 at 53 at. % of copper. This value is in good agreement with that obtained by Meyer & Wolff (1958), and contrary to that based on the familiar measurements of Alder (1916). The reduced magnetization-temperature curves of some of the alloys are given and these show a continuous marked decrease in fullness with increasing copper content.
Reference19 articles.
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2. Alder M. 1916 Thesis Zurich.
3. Remarks on the ferromagnetic ground state
4. A rro tt A. 1954 Carnegie In st. Tech. Rep.
5. Proc. Roy;Bagguley C. F .;Soc. A,1955
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