Published in 17th Conference on Magnetism and Magnetic Materials, Volume 5, January 1, 1971, pages 659-662.
NOTE: At the time of publication, the author Richard B. Frankel was not yet affiliated with Cal Poly.
Mossbauer measurements at 4.2 ≤T ≤ 22 K and OsHosBO kOe are + reported in (Fe Salen Cl)2, a molecular complex containing two coupled Fe3+ ions bridged by oxygen atoms. At 4.2 K only the ground state with effective spin S = 0 is appreciably populated. Analysis of the magnetic field and temperature dependence of the magnetic hyperfine field yields an exchange constant J= -6.7 cm>sup>-1 and a hyperfine field of -192 kOe per unit spin at each Fe3+ nucleus.
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