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2 2013

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Hyperfine interactions in Tb0.27-xYxDy0.73Fe2 compounds at 295 K

Krawczyk A., Zwoźniak A., Guzdek P., Stoch P., Zachariasz P., Suwalski J., Pszczoła J.

Nukleonika

2013

Vol. 58, No. 1

133-135

This paper concerns the synthesis of yttrium-dilute Tb0.27-xYxDy0.73Fe2 intermetallic series with a borderline compound Tb0.27Dy0.73Fe2 known as Terfenol-D by arc melting, XRD analysis and 57Fe Mössbauer effect studies at 295 K. XRD analysis (295 K) shows that all samples crystallize in a cubic, Fd3m, MgCu2-type structure. The lattice parameter increases along with yttrium content. Mössbauer effect spectra for the Tb0.27-xYxDy0.73Fe2 series collected at 295 K consist of two subspectra due to easy direction of magnetization <111>. Hyperfine interaction parameters: isomer shift, magnetic hyperfine field and a quadrupole splitting were obtained from the fitting procedure of the spectra.

Hyperfine interactions in Dy(Co0.4-xNixFe0.6)2 compounds at 295 K

Zwoźniak A., Krawczyk A., Stoch P., Guzdek P., Zachariasz P., Suwalski J., Pszczoła J.

Nukleonika

2013

Vol. 58, No. 1

179-181

57Fe Mössbauer effect studies were performed for the cubic C15, Fd3m, MgCu2-type Dy(Co0.4-xNixFe0.6)2 intermetallics. Hyperfine interaction parameters : isomer shift, magnetic hyperfine field and quadrupole interaction parameter were obtained from the fitting procedure of the collected 57Fe Mössbauer effect spectra. As a result of Co/Ni substitution, a Slater-Pauling type curve for the average magnetic hyperfine field vs. Ni content in the Dy(Co0.4-xNixFe0.6)2 series is observed.