Mössbauer Effect and Magnetic Properties of Iron-Beryllium Compounds
- 1 March 1968
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 39 (4), 2123-2126
- https://doi.org/10.1063/1.1656498
Abstract
Mössbauer measurements using Fe57 were made on the Fe–Be system in the composition range between 66 and 85 at. % Be. The internal field and the isomer shift in FeBe2 (66.7% Be, MgZn2 structure) are 192±5 kOe and 0.13±0.05 mm/sec, respectively. A metallic iron standard at room temperature was used. The Mössbauer spectrum of a single crystal of FeBe2 shows that the magnetization is parallel to the c axis. When the Be concentration is increased above 66.7%, two or more internal fields are observed, corresponding to Fe (4), Fe (3), and so on. Fe (4), Fe (3), etc., are defined as Fe atoms which have 4, 3 Fe atoms, respectively, in the nearest‐neighbor iron sites. When the Be concentration exceeds 75%, the MgCu2 crystal structure develops and the materials are paramagnetic. The (Fe–Mn) Be2 system was also investigated. It was found that the presence of nearest‐neighbor Mn atoms decreases the field at the iron sites by approx 14%.Keywords
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