Surface hyperfine magnetic field in nickel

61Ni Mössbauer measurements have been performed at 4.2 K on spherical Ni particles covered with a protective layer of SiO, with average diameters of 500 and 50 Å. The spectrum of 50 Å particles has a surface component corresponding to a hyperfine magnetic field of 40.3(5.4) kOe. This constitutes the...

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Veröffentlicht in:	Journal of magnetism and magnetic materials 1987-12, Vol.70 (1), p.439-441
Hauptverfasser:	Stadnik, Z.M., Griesbach, P., Dehe, G., Gütlich, P., Kohara, T., Stroink, G.
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Cross-disciplinary physics: materials science rheology Electron states Exact sciences and technology Magnetic resonances and relaxations in condensed matter, mössbauer effect Materials science Metals, semimetals and alloys Mössbauer effect other γ-ray spectroscopy Physics Specific materials
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Zusammenfassung:	61Ni Mössbauer measurements have been performed at 4.2 K on spherical Ni particles covered with a protective layer of SiO, with average diameters of 500 and 50 Å. The spectrum of 50 Å particles has a surface component corresponding to a hyperfine magnetic field of 40.3(5.4) kOe. This constitutes the first experimental evidence supporting the recent theoretical prediction of a significant reduction in the hyperfine magnetic field at the Ni surface as compared with the field in the bulk.
ISSN:	0304-8853
DOI:	10.1016/0304-8853(87)90498-7