Magnetic susceptibility and exchange coupling in the mineral ardennite

Ardennite, a rare silicate mineral, contains about 19 wt.% manganese. Some of the manganese atoms are in positions which are close enough to allow negative exchange and hence a reduction of the total magnetic susceptibility. It is shown that the susceptibility can be accounted for approximately by t...

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Bibliographic Details
Published in:The Journal of physics and chemistry of solids 1969-01, Vol.30 (9), p.2235-2239
Main Authors: Thorpe, A.N., Senftle, F.E., Donnay, G.
Format: Article
Language:English
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Summary:Ardennite, a rare silicate mineral, contains about 19 wt.% manganese. Some of the manganese atoms are in positions which are close enough to allow negative exchange and hence a reduction of the total magnetic susceptibility. It is shown that the susceptibility can be accounted for approximately by the treatment of Earnshaw and Lewis (1958) for S = 5 2 and a Hamiltonian H = −2 gμ H b −2 JS 1· S 2.
ISSN:0022-3697
1879-2553
DOI:10.1016/0022-3697(69)90149-8