Abstract
FERROMAGNETIC substances, in addition to their purely magnetic qualities, have other properties which are distinctive. For example, the temperature coefficient of resistance and the thermo-electric power behave abnormally up to the critical temperature, and become approximately normal above this point. But notably the true specific heat shows abnormal behaviour with rise of temperature. It increases to a high value (Cθ) at the critical temperature, and then immediately above this temperature there is an abrupt change (C) to a much lower value.
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ASHWORTH, J. The Relation of Specific Heat to Ferromagnetism. Nature 121, 323 (1928). https://doi.org/10.1038/121323a0
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DOI: https://doi.org/10.1038/121323a0