X-MCD Study of Expanded Lattice Permanent Magnet Materials |
| Cz. Kapusta, R. Mycielski, B. Porębska Department of Solid State Physics, University of Mining and Metallurgy, Al. Mickiewicza 30, 30-059 Cracow, Poland D. Ahlers, K. Attenkofer, P. Fischer and G. Schütz Institute of Experimental Physics II, University of Augsburg, 86135 Augsburg, Germany |
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| X-ray magnetic circular dichroism measurements on the cobalt (iron) K edges and samarium L2, L3 edges of Sm2Fe17, Sm2Co17 and their interstitial hydrides and nitrides are reported. Normal absorption profiles show considerable changes upon nitriding for iron- and cobalt K edge and for samarium L2, L3 edges. Much weaker changes are observed upon hydriding. Similarly, significant differences of X-MCD spectra appear between the host Sm2Fe17 (Sm2Co17) and the nitrides, whereas X-MCD signals of the hydrides are similar to those of the hosts. The effects are analysed and discussed in terms of influence of interstitial atom neighbours on the Co(Fe) 4p and Sm 5d electronic bands. |
| DOI: 10.12693/APhysPolA.91.975 PACS numbers: 75.30.-m, 78.70.Dm |