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ferrimagnetism|fɛrɪˈmægnɪtɪz(ə)m|
[ad. F. ferrimagnétism-e (L. Néel 1948, in Ann. de Physique III. 146), f. ferri- taken as an altered form of ferro-) + magnetism.]
A type of magnetism which is macroscopically similar to ordinary ferromagnetism but which is attributed to the non-parallel (esp. antiparallel) alignment of neighbouring atoms or ions having unequal magnetic moments.
1948Physics Abstr. LI. 336/1 In some cases (ferri⁓magnetism) the substance behaves at a low temperature like a ferromagnetic, but..the saturation magnetization at 0°k is much less than that corresponding to complete parallelism of all the spins. 1966[see ferromagnetism].
Hence ferriˈmagnet, a ferrimagnetic solid; ferrimagˈnetic a. and n., (a substance) possessing the properties of ferrimagnetism.
1950Physics Abstr. LIII. 756/2 It is shown that the ferrites (ferrimagnetics) are a special case of antiferro⁓magnetism. 1951L. F. Bates Mod. Magnetism (ed. 3) viii. 322 The ferrites are ferrimagnetic substances which obey the general chemical formula Fe2O3MO, where M is a bivalent metal. 1955Amer. Jrnl. Physics XXIII. 357/2 In a ferrimagnetic material..the complete magnetic structure contains more than one kind of magnetic ion, or more than one kind of crystallographic site. 1963J. K. Stanley Electr. & Magn. Prop. Metals v. 218 Ferrimagnets are much weaker than ferromagnets. 1966Phillips & Williams Inorg. Chem. II. xxviii. 421 Many of these compounds, e.g. MgFe2O4, show some magnetism despite the aligning of Fe3+ spins and they have been called ferrimagnetics. 1968Jrnl. Applied Physics XXXIX. 903/1 If a ferrimagnet is submitted to an external increasing magnetic field individual sublattice rotations start to occur at some threshold field. |