Abstract
REASONS have been given recently by J. Dorfman (NATURE, Mar. 5, 1927, p. 353) and by W. Peddie (NATURE, July 16, 1927, p. 80) against the view that there is in a magnet an intrinsic magnetic field of immense magnitude. It is true that an enormous intrinsic magnetic field explains simply, by analogy with the behaviour of fluids, how ferro -magnetic properties come into existence when a ferro-magnetic substance passes through the critical point from a high to a low temperature. By equating magnetic and thermal energies a formula can be obtained for the magnitude of this intrinsic field which at its maximum is, according to Weiss, 3Rθ/σo, σo, being the maximum specific magnetisation, θ the critical temperature and R the gas constant referred to two degrees of freedom of kinetic energy.
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ASHWORTH, J. The Intrinsic Field of a Magnet. Nature 120, 477 (1927). https://doi.org/10.1038/120477a0
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DOI: https://doi.org/10.1038/120477a0
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