4.5 Article

Magnetic properties of Fe72V4Cu1Si15B8 alloy with a composite amorphous/nanocrystalline structure

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ELSEVIER
DOI: 10.1016/j.jmmm.2022.170141

关键词

Magnetoimpedance; Amorphous; nanocrystalline structure; Inverted hysteresis loops; Exchange bias; Magnetic properties

资金

  1. Ministry of Education, Science and Technological Development of the Republic of Serbia [451-03-68/2022-14/200146, 451-03-68/2022-14/200132, 451-03-68/2022-14/200325]

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The influence of thermally induced microstructural transformations on the magnetic properties of Fe72Cu1V4Si15B8 ribbon was studied, and it was found that the orientation of the ribbon affects the magnetic properties. The magnetic hysteresis loop was inverted for perpendicular orientation, and the magnetization of the material was significantly affected by the thermally induced microstructural transformations. The ribbon with a nanocrystalline structure, annealed at 773 K for one hour, exhibited the best magnetic properties.
The influence of thermally induced microstructural transformations of Fe72Cu1V4Si15B8 ribbon with a composite amorphous/nanocrystalline structure and the effect of orientation of the ribbon relative to magnetic field on magnetic properties were studied. The magnetic hysteresis loop was shown to be inverted for perpendicular orientation of the ribbon, in the magnetic field range 10-504 kA/m, as a consequence of ferromagnetic/antiferromagnetic exchange among the various components of magnetization. Magnetic measurements performed using VSM device and Faraday balance revealed that thermally induced microstructural transformations affect significantly the magnetization of the studied material. The best magnetic properties, including saturation magnetization and magnetoimpedance (MI) ratio (MI of 204 %, at f = 7.15 MHz and H = 0 A/m) were achieved for the ribbon having a nanocrystalline structure, annealed at 773 K for one hour.

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