Hyperfine fields for an Fe atom in intermetallic compounds, Fe 5 Sn 3 and FeSn, have been investigated by using the Mössbauer effect. The hyperfine field of Fe 5 Sn 3 with hexagonal B8 2 -type structure is 187kOe on 2(a) sites while that on 2(d) sites has two values, 247kOe and 208kOe, at liquid-air temperature. The B8 2 -type structure of Fe 5 Sn 3 is stable above 760°C and the magnetic Curie temperature is (280°±5°)C. FeSn of hexagonal B35-type is antiferromagnetic with the Néel temperature at 97°C and the hyperfine field is 163kOe on an Fe site at liquid-air temperature. Temperature dependence of hyperfine field, isomer shift and quadrupole interaction was also studied.
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Hisao Yamamoto (1966) studied this question.
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