Magnetism of Synthetic and Natural MnC
- 10 December 1969
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 188 (2), 924-930
- https://doi.org/10.1103/physrev.188.924
Abstract
Weakly ferromagnetic MnC powder with °K shows single-domain behavior with coercive force of about 3.5 kOe at 4.2°K. The differential susceptibility at dc and 10 MHz is less at low fields than at high fields for °K; the remanent susceptibility is the same as the initial susceptibility. The measurements are consistent with a magnetization process involving spin flopping of the sublattices in the low-anisotropy basal plane. The measured remanent moment at 4.2°K indicates a spontaneous (ferromagnetic moment of 92 emu/mole in pure MnC. Natural crystals of composition C (2.3% Fe by weight) show no weak ferromagnetism below °K. Instead, the spins are aligned parallel to the trigonal crystal axis, resulting in normal uniaxial antiferromagnetism. The large anisotropy of the impurities is assumed to be the cause.
Keywords
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