Published in Physical Review B, Volume 5, Issue 7, April 1, 1972, pages 2469-2474.
NOTE: At the time of publication, the author Richard B. Frankel was not yet affiliated with Cal Poly.
The definitive version is available at https://doi.org/10.1103/PhysRevB.5.2469.
Iron-doped KMgF3 single crystals have been studied by Mössbauer spectroscopy of Fe57. Single lines due to Fe2+ and Fe3+ are observed at room temperature. For TK, the Fe2+ line splits into a quadrupole doublet with a splitting ΔEQ=0.44±0.02 mm/sec. Comparison with a random-strain model due to Ham yields a value of 120 cm-1 for the position of the first excited spin-orbit split level. Magnetic hyperfine structure in external magnetic fields at low temperature is observed and analysis yields a value of -495 ±30 kOe for the corepolarization hyperfine field in Fe2+ and a value of 4.1 a.u. for〈1/r3〉.
This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Physical Society. The following article appeared in Physical Review B.