Abstract
MAGNETIC domain effects in hæmatite were first found by the electron beam method1, and the domains themselves were observed2, using the Faraday effect, in very thin synthetic crystals. The domains disappeared2 below about −23° C., demonstrating very clearly the vanishing of the total magnetic moment. The domains also grew (and disappeared) by a nucleation process, and there appeared to be no ‘memory effect’.
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References
Blackman, M., Haigh, G., and Lisgarten, N. D., Nature, 179, 1288 (1957).
Williams, H. J., Sherwood, R. C., and Rameika, J. P., J. App. Phys., 29, 1772 (1958).
Lin, S. T., J. App. Phys., 32, 394 S (1961).
Kaye, G., Ph.D. thesis, London (1960).
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BLACKMAN, M., GUSTARD, B. Domains in Hæmatite. Nature 193, 360–361 (1962). https://doi.org/10.1038/193360a0
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DOI: https://doi.org/10.1038/193360a0
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