Influence of structural transformations on functional properties of Fe75Ni2Si8B13C2 amorphous alloy

0385510 - ÚFM 2013 RIV CH eng J - Článek v odborném periodiku
Minić, Dušan M. - Blagojević, V. - Maričić, A. - Žák, Tomáš - Minić, Dragica M.
Influence of structural transformations on functional properties of Fe75Ni2Si8B13C2 amorphous alloy.
Materials Chemistry and Physics. Roč. 134, č. 1 (2012), s. 111-115. ISSN 0254-0584. E-ISSN 1879-3312
Grant CEP: GA MŠMT 1M0512
Institucionální podpora: RVO:68081723
Klíčová slova: Amorphous materials * Mössbauer spectroscopy * Electrical properties * Magnetic properties
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 2.072, rok: 2012

The influence of thermal treatment on functional properties of Fe75Ni2Si8B13C2 amorphous alloy was investigated. Thermal history of the sample was found to have a significant effect on magnetic properties. Structural transformations were identified using DSC and thermomagnetic curve and characterized using Mössbauer spectroscopy and X-ray diffraction. Further investigation of magnetic and electrical properties of the alloy showed that structural relaxation prior to crystallization affected both magnetic susceptibility and electrical resistivity of the alloy, leading to an increase in both. This was caused by a confluence of stress relieving and a decrease in number of defects and an increase in free volume in the alloy sample, not only enabling greater mobility of magnetic domain walls, but also decreasing electron density of states at the Fermi level. The alloy also exhibits a wide supercooled liquid region before crystallization, where its functional properties remained relatively constant, exhibiting the low values of both magnetic susceptibility and electrical conductivity.
Trvalý link: http://hdl.handle.net/11104/0215229