<abstract xmlns="http://www.w3.org/1999/xhtml"> Nanocrystalline Fe80-x-yCoxNiyCu1Nb3Si4B12 alloys were prepared by the annealing of amorphous ribbons. Primary crystallization of the alloys annealed at temperatures of between 500 and 550°C was studied by X-ray diffraction and Mössbauer spectroscopy. Magnetic properties of the alloys were investigated using a hysteresis loop tracer and vibrating sample magnetometer. The annealed ribbons are composed of a two-phase nanostructure consisting of bcc Fe-based grains embedded in an amorphous matrix. Conversion electron Mössbauer spectroscopy (CEMS) measurements reveal a more advanced crystallization process in the surface layers when compared with the volume of the ribbons. The degree of saturation magnetization of the nanocrystalline alloys is of about 1.5 T. The coercive field varies from 1.0 to 6.5 A/m and peaks at an annealing temperature of 525°C. Magnetic softening of the nanocrystalline alloys observed after annealing at 550°C is correlated with a volume fraction of the nanocrystalline bcc phase.</abstract>

Nanocrystalline Fe80-x-yCoxNiyCu1Nb3Si4B12 alloys were prepared by the annealing of amorphous ribbons. Primary crystallization of the alloys annealed at temperatures of between 500 and 550°C was studied by X-ray diffraction and Mössbauer spectroscopy. Magnetic properties of the alloys were investigated using a hysteresis loop tracer and vibrating sample magnetometer. The annealed ribbons are composed of a two-phase nanostructure consisting of bcc Fe-based grains embedded in an amorphous matrix. Conversion electron Mössbauer spectroscopy (CEMS) measurements reveal a more advanced crystallization process in the surface layers when compared with the volume of the ribbons. The degree of saturation magnetization of the nanocrystalline alloys is of about 1.5 T. The coercive field varies from 1.0 to 6.5 A/m and peaks at an annealing temperature of 525°C. Magnetic softening of the nanocrystalline alloys observed after annealing at 550°C is correlated with a volume fraction of the nanocrystalline bcc phase.

Mössbauer and magnetic studies of FeCoNiCuNbSiB nanocrystalline alloys

Nukleonika

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{"article-title":"Mössbauer and magnetic studies of FeCoNiCuNbSiB nanocrystalline alloys"}

Nanocrystalline Fe80-x-yCoxNiyCu1Nb3Si4B12 alloys were prepared by the annealing of amorphous ribbons. Primary crystallization of the alloys annealed at...

Mössbauer and magnetic studies of FeCoNiCuNbSiB nanocrystalline alloys

Published Online: Jun 09, 2017

Page range: 79 - 84

Received: Jul 15, 2016

Accepted: Nov 07, 2016

DOI: https://doi.org/10.1515/nuka-2017-0010

Keywords
amorphous ribbons, nanocrystalline alloys, Mössbauer spectroscopy, soft magnetic properties

© by Agnieszka Grabias

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Mössbauer and magnetic studies of FeCoNiCuNbSiB nanocrystalline alloys

Published Online: Jun 09, 2017

Page range: 79 - 84

Received: Jul 15, 2016

Accepted: Nov 07, 2016

DOI: https://doi.org/10.1515/nuka-2017-0010

Keywordsamorphous ribbons, nanocrystalline alloys, Mössbauer spectroscopy, soft magnetic properties

© by Agnieszka Grabias

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Keywords
amorphous ribbons, nanocrystalline alloys, Mössbauer spectroscopy, soft magnetic properties