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Magnetic Features at the Surfaces of Nanocrystalline Ribbons

100%

Miglierini M., Šafářová K.

issue 5

840-842

Magnetic behaviour of Nanoperm Fe_{90}Zr_7B_3 nanocrystalline alloy is studied by surface sensitive techniques comprising atomic force microscopy and magnetic force microscopy. Correlation of structural arrangement and magnetic order including the orientation of net magnetization is obtained by the help of the Mössbauer spectrometry. As-quenched amorphous alloys show no magnetic features. After annealing, maze magnetic domains have developed. Their shape is governed by surface crystallization. Position of net magnetization out of the ribbon plane by about 26° was determined by the Mössbauer spectrometry.

Magnetic Hyperfine Fields of Nanoperm Alloys

81%

Miglierini M., Kohout J., Lančok A., Šafářová K.

Acta Physica Polonica A

2012

vol. 121

issue 5-6

1263-1265

Magnetic hyperfine fields of Fe_{90}Zr_7B_3 Nanoperm nanocrystalline alloy are characterized by ^{57}Fe Mössbauer spectrometry and ^{57}Fe NMR as well as by magnetic force microscopy. ^{57}Fe NMR enables to distinguish a broad signal of iron atoms located in a residual amorphous matrix from a narrow one which belongs to Fe in nanograins. The former coincides with the distribution of hyperfine fields obtained from ^{57}Fe Mössbauer spectroscopy. In addition, it is possible to make a distinction between NMR signals of the Fe nanograins located in magnetic domains from that of the nanograins positioned in domain walls. This is confirmed by magnetic force microscopy where appearance of maze-domains is observed.

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2 Acta Physica Polonica A

1 2012

1 2010

2 Miglierini M.

2 Šafářová K.

1 Kohout J.

1 Lančok A.

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Magnetic Features at the Surfaces of Nanocrystalline Ribbons

Magnetic Hyperfine Fields of Nanoperm Alloys