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- W2031136053 abstract "Einkristalle der Zusammensetzung 50 Ni 50 Fe wurden parallel zu einer (100)-Ebene geschnitten und mit einem 100 kV-Elektronenmikroskop untersucht. Dieses Material eignet sich wegen seiner hohen Sättigungsmagnetisierung und niedrigen Anisotropie besonders gut zur Beobachung magnetischer Wandstrukturen. Die den Wandwinkel bestimmende effektive Anisotropie ist dabei durch eine überlagerung von Kristallanistropie und zufälligen Spannungs-anisotropien gegeben, so dass Wandwinkel jeder Grösse gefunden werden. Im Einklang mit den theoretischen Vorhersagen konnten bei Schichtdicken zwischen 500 Å und 2000 Å in Abhängigkeit vom Wandwinkel θ drei verschiedene Wandtypen identifiziert werden: 1) bei 180° ⩾ θ #62; 140° die asymmetrische Blochwand, 2) bei 140° #62; θ #62; θs die asymmetrische Néelwand und 3) bei θs #62; θ die symmetrische Néelwand, wobei θs ein von der Foliendicke abhängeder Winkel ist. We prepared thin single crystal foils of 50 Ni 50 Fe for observation in a 100 kV electron microscope. Due to its high saturation induction and low anisotropy, magnetic domain walls can be easily observed in this material. The effective anisotropy which governs the wall angles consists of crystal anisotropy and superimposed random stress anistropies so that wall angles of any magnitude are found. In accordance with theory three distinct wall types are identified for film thickness between 500 Å and 2000 Å as a function of wall angle θ: (i) the asymmetric Bloch wall for 180° ⩾ θ #62; 140°, (ii) the asymmetric Néel wall for 140° #62; θ #62; θs, and (iii) the symmetric Néel wall for θs #62; θ, where θs is an angle which decreases with increasing film thickness." @default.
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- W2031136053 date "1975-12-01" @default.
- W2031136053 modified "2023-09-27" @default.
- W2031136053 title "Lorentz-mikroskopie von Bloch- und Néelwänden in Ni-Fe-kristallen" @default.
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- W2031136053 doi "https://doi.org/10.1016/0304-8853(75)90099-2" @default.
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