^{57}Fe Hyperfine Interactions in the Sc(Fe_{1-x}Ni_x)_2 Laves Phases Synthesized under High Pressure

• Authors: M. Wiertel , Z. Surowiec , M. Budzyński , A. Tsvyashchenko
• Languages of publication: EN

Abstracts

EN

The structural and microscopic magnetic properties of the pseudobinary Sc(Fe_{1-x}Ni_x)_2 system prepared under high pressure of 8 GPa were studied by X-ray diffraction and Mössbauer measurements in the range of 0.0 ≤ x ≤ 0.60. The samples for 0.0 ≤ x ≤ 0.10 have the hexagonal C14-type structure and those for 0.30 ≤ x ≤ 0.60 crystallize in the C15-type structure. Both the magnetic hyperfine field on ^{57}Fe and the Curie temperature decrease with the increasing Ni content and the system becomes paramagnetic for x ≈ 0.60 at room temperature. The form and temperature dependences of the Mössbauer spectra for 0.40 ≤ x ≤ 0.50 indicate the coexistence of paramagnetic and ferromagnetic regions in the samples and occurrence of magnetic clusters with a wide distribution of the Curie temperatures. It is interesting that T_C for the compounds obtained under high pressure are by about 100 K smaller in comparison with those for the isostructural samples produced under normal pressure even though interatomic distances are practically equal in the both types of compounds.

Keywords

EN

76.80.+y; 77.80.Bh; 75.30.Kz; 07.35.+k

Discipline

• 07.35.+k: High-pressure apparatus; shock tubes; diamond anvil cells
• 76.80.+y: Mössbauer effect; other γ-ray spectroscopy(see also 33.45.+x Mössbauer spectra—in atomic and molecular physics; for biophysical applications, see 87.64.kx; for chemical analysis applications, see 82.80.Ej)
• 75.30.Kz: Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)(for ferroelectric phase transitions, see 77.80.B-; for superconductivity phase diagrams, see 74.25.Dw)

• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 114
• Issue: 6
• Pages: 1517-1527

Dates

published

2008-12

Contributors

author

M. Wiertel

• Institute of Physics, M. Curie-Skłodowska University, pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland

author

Z. Surowiec

• Institute of Physics, M. Curie-Skłodowska University, pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland

author

M. Budzyński

• Institute of Physics, M. Curie-Skłodowska University, pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland

author

A. Tsvyashchenko

• Vereshchagin Institute for High Pressure Physics, Russian Academy of Sciences, Troitsk 142190, Moscow Region, Russia

References

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Identifiers

DOI

10.12693/APhysPolA.114.1517