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XIV.—Magnetic Quality in Crystals. Part I. Discrimination of, and Stability in, Magnetic Lattices. Part II. Stability of Magnetic Lattices. Part III. Twinning in Crystals

Published online by Cambridge University Press:  06 July 2012

J. Forrest
J. Forrest
Affiliation:
Carnegie Teaching Fellow, University College, Dundee.
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Extract

This research was undertaken as an endeavour to build up a method of discrimination of magnetic lattices in crystalline substances. Theory, due to Professor Peddie, hereafter referred to and expanded in detail, gives an estimate of the intensity of Magnetisation in a co-directed system of regularly arranged magnetic doublets, such as we may regard a magnetised piece of crystalline substance to be composed of.

When a magnetic field is applied to a crystalline portion of matter it is magnetised, not necessarily in the direction of the field, as would be the case if the substance were purely amorphous, but in general in some direction inclined to that of the magnetising field. This is due to the crystalline quality of the body, and the consequent internal inter-polar magnetic reactions. The saturation intensity of magnetisation in any plane is constant, but its obliquity to the field varies with the orientation of the field in the substance. The external field is assumed to be strong enough to co-direct all the molecular magnets; that is, to produce saturation.

Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 54 , Issue 3 , 1926 , pp. 601 - 701
Copyright
Copyright © Royal Society of Edinburgh 1926

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References

page 601 note * Proc. Roy. Soc. Edin., vol. xxxii, Part iii, No. 17, p. 216, 1911–12.

page 601 note † Ibid., vol. xxviii, Part viii, No. 39, p. 644, 1907–8.

page 601 note ‡ Ibid., vol. xxv, Part xii, p. 1025, 1904–5.

page 612 note * Vide Part II of this research.

page 631 note * Vide Professor W. Peddie, Paper III, p. 227, and in Part II of this research.

page 636 note * Bragg, X-Rays and Crystal Structure, 4th edition, p. 262.

page 701 note * Vide Part I of this research.