Anhysteretic remanent magnetization of small multidomain Fe3O4 particles dispersed in various concentrations in a non magnetic matrix

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E. Schmidbauer
R.J. Veitch


The anhysteretic remanent magnetization (ARM) and hysteresis parameters of synthetic, small, multidomain particles (0.2–0.4 μ) of Fe3O4 , dispersed at various concentrations in a non magnetic matrix (packing factors p = 0.01–0.3), have been measured. The coercive force Hc is weakly dependent on p. At higher concentrations the shape of the sample has a strong influence on the magnetization. There appears to be an additional concentration dependence of the ARM. However, the independence of partial ARMs also holds for larger p.

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Schmidbauer, E., & Veitch, R. (1980). Anhysteretic remanent magnetization of small multidomain Fe3O4 particles dispersed in various concentrations in a non magnetic matrix. Journal of Geophysics, 48(1), 148-152. Retrieved from


Amar, H. (1957) On the width and energy of domain walls in small multidomain particles. J. Appl. Phys. 28:732-733

Amar, H. (1958a) Size dependence of the wall characteristics in a two-domain iron particle. J. Appl. Phys. 29:542-543

Amar, H. (1958b) Magnetization mechanism and domain structure of multidomain particles. Phys. Rev. 111:149-153

Banerjee, S.K., Mellema, J.P. (1974) A new method for the determination of paleointensity from the ARM properties of rocks. Earth Planet. Sci. Lett. 23:177-184

Butler, R.F., Banerjee, S.K. (1975) Theoretical single-domain grain size range in magnetite and titanomagnetite. J. Geophys. Res. 80:4049-4058

Davis, P.M., Evans, M.E. (1976) Interacting single-domain properties of magnetite intergrowths. J. Geophys. Res. 81:989-994

Dunlop, D.J. (1973) Superparamagnetic and single-domain threshold sizes in magnetite. J. Geophys. Res. 78:1780-1793

Dunlop, D.J., Bailey, M.E., Westcott-Lewis, M.F. (1975) Lunar paleointensity determination using anhysteretic remanence (ARM): A critique. Proc. Lunar Sci. Conf. 6th, 3063-3069

Dunlop, D.J., Hanes, J.A., Buchan, K.L. (1973) Indices of multidomain magnetic behavior in basic igneous rocks: Alternating-field demagnetization, hysteresis, and oxide petrology. J. Geophys. Res. 78:1387-1393

Dunlop, D.J., Stacey, F.D., Gillingham, D.E.W. (1974) The origin of thermoremanent magnetization: Contribution of pseudo-single-domain magnetic moments. Earth Planet. Sci. Lett. 21:288-294

Dunlop, D.J., West, G.F. (1969) An experimental evaluation of single-domain theories. Rev. Geophys. Space Phys. 7:709-757

Evans, M.E., Wayman, M.L. (1974) An investigation of the role of ultrafine titanomagnetite intergrowths in palaeomagnetism. Geophys. J. R. Astron. Soc. 36:1-10

Gillingham, D.E.W., Stacey, F.D. (1971) Anhysteretic remanent magnetization (ARM) in magnetic grains. Pure Appl. Geophys. 8:160-165

Jaep, W.F. (1969) Anhysteretic magnetization of an assembly of single-domain particles. J. Appl. Phys. 40:1297-1298

Jaep, W.F. (1971) Role of interactions in magnetic tapes. J. Appl. Phys. 42:2790-2794

Johnson, H.P., Lowrie, W., Kent, D.V. (1975) Stability of anhysteretic remanent magnetization in fine and coarse magnetite and maghemite. Geophys. J. R. Astron. Soc. 41:1-10

Kneller, E. (1968) Magnetic interaction effects in fine - particle assemblies and thin films. J. Appl. Phys. 39:945-955

Kneller, E., Koster, E. (1977) Relation between anhysteretic and static magnetic tape parameters. IEEE Trans. Magn. Mag-13:1388-1390

Levi, S., Merrill, R.T. (1976) A comparison of ARM and TRM in magnetite. Earth Planet. Sci. Lett. 32:171-184

Levi, S., Merrill, R.T. (1978) Properties of single-domain, pseudo-single-domain and multidomain magnetite. J. Geophys. Res. 83:309-323

Morrish, A.H., Watt, L.A.K. (1958) Coercive force of iron oxide micro-powders at low temperatures. J. Appl. Phys. 29:1029-1033

Morrish, A.H., Yu, S.P. (1955) Dependence of the coercive force on the density of some iron oxide powders. J. Appl. Phys. 26:1049-1055

Moskowitz, B.M., Banerjee, S.K. (1979) Grain size limits for pseudosingle domain behavior in magnetite: Implications for paleomagnetism. IEEE Trans. Magn. Mag-15:1241-1246

Neel, L. (1949) Theorie du trainage magnetique des ferromagnetiques en grains fins avec applications aux terres cuites. Ann. Geophys. 5:99-136

Parry, L.G. (1965) Magnetic properties of dispersed magnetite powders. Philos. Mag. 11:303-312

Patton, B.J., Fitch, J.L. (1962) Anhysteretic remanent magnetization in small steady fields. J. Geophys. Res. 67:307-311

Rimbert, J. (1959) Contribution a l'etude de l'action de champs alternatifs sur Jes aimantations remanents des roches, Applications geophysiques. Rev. Inst. Fr. Pet. 14:123-155

Shcherbakov, V.P. (1978) Theory concerning the magnetization properties of pseudo-single domain grains. Bull. Acad. Sci. USSR, Earth Phys. 14:356-362

Shcherbakov, V.P., Shcherbakova, V.V. (1977) Calculation of thermoremanence and ideal magnetization of an ensemble of interacting singledomain grains. Bull. Acad. Sci. USSR, Earth Phys. 13:413-421

Stacey, F.D. (1963) The physical theory of rock magnetism. Adv. Phys. 12:45-133

Stacey, F.D., Banerjee, S.K. (1974) The physical principles ofrock magnetism. Elsevier, Amsterdam-London-New York

Stapper, C.H. (1969) Micromagnetic solutions for ferromagnetic spheres. J. Appl. Phys. 40:798-802

Sugiura, N. (1979) ARM, TRM and magnetic interactions: Concentration dependence. Earth Planet. Sci. Lett. 32:451-456

Thellier, E., Thellier, O. (1959) Sur l'intensite du champ magnetique terrestre dans le passe historique et geologique. Ann. Geophys. 15:285-376

Weisweiler, W., Alavi, M. (1977) Reduktion von alpha-Eisenoxid zu aktivem Magnetit und die unmittelbare Oxidation zu phasenreinem gammaEisenoxid. Ber. Dtsch. Keram. Ges. 54:268-271

Wohlfarth, E.P. (1964) A review of the problem of fine-particle interactions with special reference to magnetic recording. J. Appl. Phys. 35:783-790

Zijlstra, H. (1967) Measurements of magnetic quantities. In: Wohlfarth, E.P. (Ed.) Experimental methods in magnestism, Amsterdam: NorthHolland Publishing Company