Hyperfine interactions in Ho(Fe1-xCox)2 compounds at 295 K

• Autorzy: Bednarski M. , Stoch P. , Bodnar W. , Zachariasz P. , Pszczoła J. , Suwalski J.
• Języki publikacji: EN

Abstrakty

EN

Synthesis of Ho(Fe1–xCox)2 intermetallic compounds, studies of their crystal structure and 57Fe Mössbauer effect analysis were carried out at 295 K. X-ray measurements evidence a pure cubic Fd3m, C15, MgCu2-type Laves phase. The unit cell parameter decreases non-linearly with composition parameter x. Mössbauer effect spectra for the Ho(Fe1–xCox)2 series were composed of a number of locally originated subspectra due to random Fe/Co nearest neighbourhoods. Hyperfine interaction parameters, i.e. isomer shift, the magnetic hyperfine field and a quadrupole interaction parameter were determined from the fitting procedure of the spectra, for both the individual nearest neighbourhoods, and for the sample as bulk. As a consequence of Fe/Co substitution a Slater-Pauling type curve for the average magnetic hyperfine field vs. x is observed. The correlation between the local magnetic hyperfine fields and the average magnetic hyperfine fields is related to weak and strong ferromagnetism of the transition metal sublattice.

Słowa kluczowe

EN

intermetallics; crystal structure; Laves phase; Mössbauer effect; hyperfine interaction; Slater-Pauling dependence

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2010
• Tom: Vol. 55, No. 3
• Strony: 279--284
• Opis fizyczny: Bibliogr. 29 poz., rys.

Twórcy

autor

Bednarski M.

autor

Stoch P.

autor

Bodnar W.

autor

Zachariasz P.

autor

Pszczoła J.

autor

Suwalski J.

• Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, 30 A. Mickiewicza Ave., 30-059 Kraków, Poland, Tel.: [phone], Fax: [phone],

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