Pramana | |
Mossbauer effect studies of Tb0.27Dy0.73(Fe1−ð‘¥Coð‘¥)2 intermetallics at 295 K | |
P Stoch22  J Pszczola11  P Zachariasz2  W Bodnar1  J Suwalski2  M Szklarska-Lukasik1  | |
[1] Faculty of Physics and Applied Computer Science, AGH, Al. Mickiewicza 30, 30-059 Kraków, Poland$$;Institute of Atomic Energy, 05-400 Świerk-Otwock,Poland$$ | |
关键词: Intermetallics; crystal structure; Laves phase; Mössbauer effect; hyperfine interaction; Slater–Pauling dependence; easy axis of magnetization.; | |
DOI : | |
学科分类:物理(综合) | |
来源: Indian Academy of Sciences | |
【 摘 要 】
The synthesis of materials and the studies of crystal structure and 57Fe Mössbauer effect were performed for Tb0.27Dy0.73 (Fe1−ð‘¥Coð‘¥)2 intermetallics. Terfenol-D (Tb0.27Dy0.73Fe2) is the starting compound of this Fe/Co-substituted series. X-ray measurements showed evidence of a pure cubic Laves phase C15, MgCu2-type, and unit cell parameters were determined across the series. A Co substitution introduced local area, at sub-nanoscale, with random Fe/Co neighbourhoods of the 57Fe atoms.Mössbauer effect spectra for the Tb0.27Dy0.73 (Fe1−ð‘¥Coð‘¥)2 series at room temperature are composed of a number of locally originated subspectra due to the random distribution of Fe and Co atoms in the transition metal sublattice, and due to [1 1 1] an easy axis of magnetization. Isomer shift, magnetic hyperfine field and quadrupole interaction parameter were obtained from the spectra, both for the local area and for the bulk sample.As a result of Fe/Co substitution, a Slater–Pauling-type curve for the average magnetic hyperfine field vs. Co content was observed. It was found that the magnetic hyperfine fields corresponding to the local area also create a dependence of the Slater–Pauling-type vs. Co contribution in the Fe/Co neighbourhoods.
【 授权许可】
Unknown
【 预 览 】
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RO201912040498116ZK.pdf | 2274KB | download |