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Theoretical and Mössbauer Effect Study of Magnetic and Electronic Properties of Fe_{3}Al Compound

100%
Deniszczyk J., Frąckowiak J. E.
Acta Physica Polonica A
|
1997
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vol. 91
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issue 2
455-458
EN
The electronic properties of Fe_{3}Al were determined experimentally, with the use of the Mossbauer spectroscopy, and theoretically. The band structure of the compounds was investigated applying the self-consistent tight-binding linear muffin tin orbital method. The calculated Fermi contact term of hyperfine fields and the isomer shifts are in good agreement with the values resulting from analysis of experimental data. The different kinds of electron transfer estimated on the base of the proposed "additive model" are also strongly supported by calculations.
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Positron Annihilation Study of the Ageing Effects in the Cu-Zn-Sn Parent Phase

81%
Frąckowiak J. E., Płotkowski K., Salamon A.
Acta Physica Polonica A
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1995
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vol. 88
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issue 2
327-332
EN
A study of ageing effects on the structure of Cu-Zn-Sn shape memory alloys was performed using the ^{119}Sn Mössbauer spectroscopy and positron annihilation techniques (the positron lifetime, and Doppler broadening line-shape S-parameter measurements). Two stages of ageing at 200°C connected with redistribution of Sn atoms were observed.
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