ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
In a previous work, 89Y measurements at 4.2 K in (RxY1−x)Fe2 compounds, with R=Tb and Ho and 0.05≤x≤0.20, have shown broad nuclear-magnetic-resonance (NMR) spectra, due to transferred hyperfine interactions. 89Y NMR signals could not be observed with R=Dy in the same composition range. In the present work, compounds were prepared with Dy in the concentration range 0.005≤x≤0.02 to investigate the origin of this anomaly. Compared to the pure YFe2 compound, the observed NMR spectra are broadened and show a shift towards higher frequencies. With increasing Dy concentration, the NMR signals fall very rapidly. Magnetization measurements at 4.2 K were performed in samples with Tb, Ho, and Dy; the results indicate that the behavior of the Dy compounds is qualitatively different in the low-magnetic-field region of the curves, requiring a minimum applied field to start increasing the magnetization. The NMR data and the magnetization results of the Dy compounds can both be explained as arising from a much lower mobility of the domain walls.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.345997
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