Mossbauer Study of an Intramolecular Antiferromagnet

R. Lechan, Brandeis University
C. R. Abeledo, Brandeis University
R. B. Frankel, Massachusetts Institute of Technology

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Copyright © 1971 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in AIP Conference Proceedings.

NOTE: At the time of publication, the author Richard B. Frankel was not yet affiliated with Cal Poly.

Abstract

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.