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XIV.—On the Magnetic Properties of certain Copper Alloys

Published online by Cambridge University Press:  15 September 2014

Alexander D. Ross  and
Robert C. Gray
Alexander D. Ross
Affiliation:
University of Glasgow
Robert C. Gray
Affiliation:
University of Glasgow
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Extract

In May 1907 a paper was read before this Society by one of us on the magnetic properties of the Heusler alloy. After that date the investigation was extended to two other copper-manganese-aluminium alloys, and latterly the scope of the research has been further extended by a series of tests carried out by the present authors conjointly on simple aluminium and manganese bronzes, and on the constituent metallic elements in the pure form, while additional tests have been made on the manganese-aluminium bronze. Some of the more interesting results obtained since the 1907 paper are given in the present communication.

Type
Proceedings
Information
Proceedings of the Royal Society of Edinburgh , Volume 29 , 1909 , pp. 274 - 286
Copyright
Copyright © Royal Society of Edinburgh 1909

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References

page 274 note * A. D. Ross, “Heusler's Magnetic Alloy,” Proc. Roy. Soc. Edin., xxvii. part 2, p. 88.

page 275 note * “Magnetisch-chemische Studien,” Ber. d. Deutsch. Phys. Gesell, 1903, S. 220Google Scholar.

page 275 note † See article by J. G. Gray and A. D. Ross, Phys. Zeit., x., No. 2, S. 59.

page 275 note ‡ Gray, J. G. and Ross, A. D., “On an Improved Form of Magnetometer, etc.,” Proc. Roy. Soc. Edin., 1908–1909Google Scholar.

page 276 note * Du Bois, , Magnetische Kreise in Theorie und Praxis, Berlin, 1894CrossRefGoogle Scholar.

page 278 note * Baking, however, always reduces the values of I corresponding to small fields.

page 281 note * “Experiments with Heusler'a Magnetic Alloy,” Proc. Roy. Soc. Edin., vol. xxviii., part 5, p. 403.

page 281 note † Proc. Roy. Soc, December 12, 1889; January 23, 1890; May 1, 1890Google Scholar.

page 283 note * Physical Review, vol. xxi. p. 335.

page 283 note † Proc. Inst. Mech. Eng., 1907, p. 204Google Scholar.

page 284 note * J. G. Gray and A. D. Ross, “Über die Herstellung permanenter Magnete aus Proben nahezu reinen Kupfers,” Phys. Zeit., x., No. 2, S. 59.

page 284 note † The existence of the compound Cu4Al mentioned by Carpenter and Edwards in the report, loc. cit., has been questioned by other experimenters. See in this connection the investigations of Gulliver, , Proc. Inst. Mech. Eng., 1907, p. 345Google Scholar; Curry, , Journ. Phys. Chem., 1907, p. 425Google Scholar; Gwyer, , Zeit. Anorg. Chem., 57, S. 125, 1908CrossRefGoogle Scholar; Guillet, Revue de métallurgie, 5, p. 413. The occurrence of Cu3Al is generally accepted, and the existence or non-existence of a compound Cu4Al does not materially affect the present discussion.

page 284 note ‡ The manganese used in this test was a specially purified sample supplied by E. de Haën of Seelze. That its magnetism was not due to iron impurity was shown by chemical analysis. The amount of iron present was probably less than one part in 10,000, and certainly did not exceed one part in 5000. Taking the upper limit, it follows that the iron present was less than of that which would be required to account for the residual magnetism.

page 285 note * Ann. d. Phys., 1889, lxix., S. 236Google Scholar.

page 285 note † Ber. d. Deutsch. Chem. Gesell., 1900, xxxiii. S. 448Google Scholar.