Abstract
Haematite is a much studied and little understood material, and to extract what might be considered the intrinsic magnetic properties, relevant to its role as a remanence carrier, from the body of available data is problematical. It seems that microstructure and extrinsic influences affect more than just the magnetization process parameters in the case of haematite. One problem is that ideal haematite has only a weak magnetization, about 0.5 percent of that of magnetite, and the measured properties of haematite samples are correspondingly susceptible to (say) the distorting effect of undetectable quantities of magnetic contaminants. Studies on highly specified crystals have tended to concentrate on the antiferromagnetic properties, and such experiments are largely irrelevant to the fine-grain remanence-carrying haematite of rock samples. Studies of fine particle samples, prepared by crushing larger crystals, by oxidizing magnetite or by the decomposition or dehydration of a suitable iron-bearing compound, produce a range of values of saturation magnetization (after high field susceptibility has been allowed for). The magnetization also is found to fall after high temperature treatment, in air, of some of the studied material. An absolute prerequisite for an interpretable study of the intrinsic properties or magnetization process in haematite is an exhaustive characterization of the sample material. However, it may be that magnetic properties are more sensitive to (say) the presence of small quantities of maghemite than are other analytical techniques, and only indirect assessment of the material may be possible.
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Bibliography
Artman, J.O., Murphy, J.C. and Foner, S. (1965) Magnetic anisotropy in anti ferromagnetic corundum-type sesquioxides. Phys. Rev. 138, A912–A917.
Banerjee, S.K. (1971) New grain size limits for the palaeomagnetic stability in haematite. Nature Phys. Sci. 232, 15–16.
Besser, P.J., Morrish, A.H. and Searle, C.W. (1967) Magnetocrystalline anisotropy of pure and doped hematite. Phys. Rev. 153, 632–640.
Bhimasankaram, V.L.S. and Lewis, M. (1966) Magnetic reversal phenomena in pyrrhotite. Geophys. J.R. Astr. Soc. 11, 485–497.
Bozorth, R.M., Walsh, D.E. and Williams, A.J. (1957) Magnetization of haematite-ilmenite system at low temperatures. Phys. Rev. 108, 157–158.
Chevallier, R. and Mathieu, S. (1943) Propriétés magnetiques des poudres d’hématites; influence des dimensions des grains. Ann. Phys. 18, 258–288.
Collinson, D.W. (1974) The role of pigment and specularite in the remanent magnetization of red sandstones. Geophys. J.R. Astr. Soc. 38, 253–264.
Creer, K.M., Hedley, I.G. and O’Reilly, W. (1975) `Magnetic oxides in geomagnetism’, in Magnetic Oxides,(ed. D.J. Craik), John Wiley & Sons, London, New York, Sydney, Toronto, Chapter 11, pp. 649–688.
Dankers, P. (1981) Relationship between median destructive field and remanent coercive forces for dispersed natural magnetite, titanomagnetite and hematite. Geophys. J.R. Astr. Soc. 64 447–461.
Dunlop, D.J. (1971) Magnetic properties of fine-particle hematite. Ann. G¨¦ophys. 27, 269–293
Dunlop, D.J. (1981) The rock magnetism of fine particles. Phys. Earth Planet. Int. 26, 1–26.
Dunlop, D.J. and Stirling, J.M. (1977) “Hard” viscous remanent magnetization (VRM) in fine-grained hematite. Geophys. Res. Letts. 4, 163–166.
Eaton, J.A. and Morrish, A.H. (1969) Magnetic domains in hematite at and above the Morin transition. J. Appl. Phys. 40, 3180–3185.
Evans, M.E., McElhinny, M.W. and Gifford, A.C. (1968) Single domain magnetite and high coercivities in a gabbroic intrusion. Earth Planet. Sci. Letts. 4, 142–146.
Flanders, P.J. and Schuele, W. (1964) `Temperature dependent magnetic properties of hematite single crystals, in Proceedings of the International Conference of Magnetism,Nottingham, September 1964, Institute of Physics and the Physical Society, London, pp, 594–596.
Fuller, M.D. (1970) Geophysical aspects of paleomagnetism. Grit. Rev. Solid State Sci. 137–219.
Halgedahl, S.L. and Fuller, M. (1981) The dependence of magnetic domain structure upon magnetization state in polycrystalline pyrrhotite. Phys. Earth Planet. Int. 26, 93–97.
Hedley, L.G. (1968) Chemical remanent magnetization in the FeOOH, Fe2O3 system. Phys. Earth Planet. Int. 1, 103–121.
Hedley, I.G. (1971) The weak ferromagnetism of goethite (a-FeOOH). Z. Geophys. 37, 409–420.
Hoffman, K.A. (1975) Cation diffusion process and self-reversal of thermoremanent magnetization in the ilmenite-haematite solid solution series. Geophys. J.R. Astr. Soc. 41, 65–80.
Hoye, G.S. and Evans, M.E. (1975) Remanent magnetizations in oxidized olivine. Geophys. J.R. Astr. Soc. 41, 139–151.
Ishikawa, Y. (1962) Magnetic properties of ilmenite-hematite system at low temperature. J. Phys. Soc. Japan 17, 1835–1844.
Ishikawa, Y. and Akimoto, S. (1958) Magnetic property and crystal chemistry of ilmenite (MeTiO3) and hematite (aFe2O3) system, 2: Magnetic property. J. Phys. Soc. Japan 13, 1298–1310.
Ishikawa, Y. and Syono, Y. (1963) Order-disorder transformation and reverse thermoremanence in the FeTiO3¡ªFe2O3 system. J. Phys. Chem. Solids 24, 517–528.
Jacobs, I.S., Beyerlein, R.A., Foner, S. and Remeika, J.P. (1971) Field induced magnetic phase transitions in antiferromagnetic hematite (a ¡ª Fe2 03). Inter. J. Magnetism 1, 193–208.
Lindsley, D.H. (1976) `Experimental studies of oxide minerals’, in Oxide Minerals (ed.: D. Rumble III), Mineralogical Society of America, Washington, D.C., Chapter 2.
Merill, R.T. (1968) A possible source for the coercivity of Ilmenite-Hematite minerals. J. Geomag. Geoelectr. 20, 181–185.
Moskowitz, B.M. and Hargraves, R.B. (1982) Magnetic changes accompanying the thermal decomposition of nontronite (in air) and its relevance to Martian mineralogy. J. Geophys. Res. 87, 10115–10128.
Nagata, T. and Akimoto, S. (1956) Magnetic properties of ferromagnetic ilmenites. Geofis. Pura e Appl. 34, 36–50.
N¨¦el, L. and Pauthenet, R. (1952) Etude thermomagn¨¦tique d’un monocristal de Fe2 03 a. C.R. Acad. Sci.(Paris) 234, 2172–2174.
Owens, W.H. (1982) A simple model for non-vanishing rotational hysteresis in haematite. Phys. Earth Planet. Int. 27, 106–113.
Schwarz, E.J. (1975) Magnetic properties of pyrrhotite and their use in applied geology and geophysics. Geol. Surv. Canada, paper 74–59.
Schwarz, E.J. and Vaughan, D.J. (1972) Magnetic phase relations of pyrrhotite. J. Geomag. Geoelectr. 22, 463–470.
Searle, C.W. and Morrish, A.H. (1966) A three sublattice theory of weakly ferromagnetic aMe¨®+Fe¨®+Fez,_¨®)03.J. Appl. Phys. 37, 1141–1142.
Smith, R.W. and Fuller, M. (1967) Alpha-hematite: stable remanence and memory. Science 156, 1130 1133.
Soffel, H.C. (1977) Pseudo-single domain effects and the single domain-multidomain transition in natural pyrrhotite deduced from domain structure observations. J. Geophys. 42, 351–359.
Soffel, H.C. (1981) Domain structure of natural fine-grained pyrrhotite in a rock matrix (diabase). Phys. Earth Planet. Int. 26, 98–106.
Stephenson, A. and Collinson, D.W. (1974) Lunar magnetic field palaeo-intensities determined by an anhysteretic remanent magnetization method. Earth Planet. Sci. Letts. 23, 220–228.
Strangway, D.W., Honea, R.M., McMahon, B.E. and Larson, E.E. (1968) The magnetic properties of naturally occurring goethite. Geophys. J.R. Astr. Soc. 15, 345–359.
Syono, Y., Akimoto, S. and Nagata, T. (1962) Remanent magnetization of ferromagnetic single crystal. J. Geomag. Geoelectr. 14, 113–124.
Urquhart, H.M.A. and Goldman, J.E. (1956) Magnetostrictive effects in an antiferromagnetic haematite crystal. Phys. Rev. 101, 1443–1450.
Ward, J.C. (1970) The structure and properties of some iron sulphides. Rev. Pure & Appl. Chem. 20, 175–206.
Westcott-Lewis, M.F. and Parry, L.G. (1971a) Magnetism in rhombohedral iron-titanium oxides. Australian J. Phys. 24, 719–734.
Westcott-Lewis, M.F. and Parry, L.G. (1971b) Thermoremanence in synthetic rhombohedral iron-titanium oxides. Australian J. Phys. 24, 735–742.
Yamamoto, N. (1968) The shift of the spin flip temperature of a- Fe2O3 fine particles. J. Phys. Soc. Japan 24, 23–28.
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O’Reilly, W. (1984). Magnetic properties of other mineral systems. In: Rock and Mineral Magnetism. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-8468-7_8
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DOI: https://doi.org/10.1007/978-1-4684-8468-7_8
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