A STM study of the microstructure of amorphous and nanocrystalline Fe-Zr-B-Cu ribbons

J. Nogués, K. V. Rao, A. Inoue, K. Suzuki

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The surface microstructures of amorphous and nanocrystallized melt-spun Fe86Zr7B6Cu ribbons have been studied by means of scanning tunneling microscopy. The amorphous sample has a smooth, almostfeatureless surface. On the other hand, the nanocrystallized sample consists of a homogeneous distribution of ellipsoidal clusters (≈ 300 nm × 150 nm) aligned along the casting direction and composed of randomly oriented nanocrystallites of about 10 nm in diameter consistent with transmission electron microscopic observations. The nanocrystallites themselves have a smooth morphology, rather than a grainy surface. The smaller size of the nanocrystallites in comparison with the ferromagnetic exchange length (about 50 nm) gives rise to the improved soft magnetic properties in these nanocrystallized ribbons.

Original languageEnglish
Pages (from-to)281-287
Number of pages7
JournalNanostructured Materials
Issue number3
Publication statusPublished - 1 Jan 1995
Externally publishedYes

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