<abstract xmlns="http://www.w3.org/1999/xhtml">Mössbauer spectra and thermomagnetic curves for the Fe86−<italic>x</italic>M<italic>x</italic>Zr7Nb2Cu1B4 (M = Co, Ni, CoCr, and Cr, <italic>x</italic> = 0 or 6) alloys in the as-quenched state and after the accumulative annealing in the temperature range 600–800 K for 10 min are investigated. The parent Fe86Zr7Nb2Cu1B4 amorphous alloy is paramagnetic at room temperature, and substitution of 6 at.% of Fe by Co, Ni, and CoCr changes the magnetic structure – the alloys become ferromagnetic, whereas replacing 6 at.% of Fe with Cr preserves the paramagnetic state. After the heat treatment at 600 K, the decrease of the average hyperfine field induction, as compared to the as-quenched state, is observed due to the invar effect. After this annealing, the Curie temperature for all investigated alloys decreases. The accumulative annealing up to 800 K leads to the partial crystallization; α-Fe or α-FeCo grains with diameters in the range of 12–30 nm in the residual amorphous matrix appear.</abstract>

Mössbauer spectra and thermomagnetic curves for the Fe86−xMxZr7Nb2Cu1B4 (M = Co, Ni, CoCr, and Cr, x = 0 or 6) alloys in the as-quenched state and after the accumulative annealing in the temperature range 600–800 K for 10 min are investigated. The parent Fe86Zr7Nb2Cu1B4 amorphous alloy is paramagnetic at room temperature, and substitution of 6 at.% of Fe by Co, Ni, and CoCr changes the magnetic structure – the alloys become ferromagnetic, whereas replacing 6 at.% of Fe with Cr preserves the paramagnetic state. After the heat treatment at 600 K, the decrease of the average hyperfine field induction, as compared to the as-quenched state, is observed due to the invar effect. After this annealing, the Curie temperature for all investigated alloys decreases. The accumulative annealing up to 800 K leads to the partial crystallization; α-Fe or α-FeCo grains with diameters in the range of 12–30 nm in the residual amorphous matrix appear.

Effects of Co, Ni, and Cr addition on microstructure and magnetic properties of amorphous and nanocrystalline Fe86−xMxZr7Nb2Cu1B4 (M = Co, Ni, CoCr, and Cr, <italic>x</italic> = 0 or 6) alloys

Institute of Physics, Czestochowa University of Technology, 19 Armii Krajowej Ave., 42-200 Częstochowa, Poland, Tel.: +48 34 325 0795, Fax: +48 34 325 0795

Institute of Materials Science & Applied Mechanics, Wrocław University of Technology, 25 Smoluchowskiego Str., 50-370 Wrocław, Poland

Nukleonika

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Effects of Co, Ni, and Cr addition on microstructure and magnetic properties of amorphous and nanocrystalline FeMZrNbCuB (M = Co, Ni, CoCr, and Cr,  = 0 or 6) alloys

Mössbauer spectra and thermomagnetic curves for the Fe86−xMxZr7Nb2Cu1B4 (M = Co, Ni, CoCr, and Cr, x = 0 or 6) alloys in the as-quenched state and after the...

Effects of Co, Ni, and Cr addition on microstructure and magnetic properties of amorphous and nanocrystalline Fe_86−xM_xZr₇Nb₂Cu₁B₄ (M = Co, Ni, CoCr, and Cr, x = 0 or 6) alloys

Published Online: Mar 12, 2015

Page range: 103 - 108

Received: Jun 18, 2014

Accepted: Nov 07, 2014

DOI: https://doi.org/10.1515/nuka-2015-0021

Keywords
amorphous materials, nanocrystalline materials, Mössbauer spectroscopy, invar effect, Curie temperature

© Agnieszka Łukiewska, Jan Świerczek, Mariusz Hasiak, Jacek Olszewski, Józef Zbroszczyk, Piotr Gębara, Wanda Ciurzyńska

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Effects of Co, Ni, and Cr addition on microstructure and magnetic properties of amorphous and nanocrystalline Fe86−xMxZr7Nb2Cu1B4 (M = Co, Ni, CoCr, and Cr, x = 0 or 6) alloys

Published Online: Mar 12, 2015

Page range: 103 - 108

Received: Jun 18, 2014

Accepted: Nov 07, 2014

DOI: https://doi.org/10.1515/nuka-2015-0021

Keywordsamorphous materials, nanocrystalline materials, Mössbauer spectroscopy, invar effect, Curie temperature

© Agnieszka Łukiewska, Jan Świerczek, Mariusz Hasiak, Jacek Olszewski, Józef Zbroszczyk, Piotr Gębara, Wanda Ciurzyńska

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Effects of Co, Ni, and Cr addition on microstructure and magnetic properties of amorphous and nanocrystalline Fe_86−xM_xZr₇Nb₂Cu₁B₄ (M = Co, Ni, CoCr, and Cr, x = 0 or 6) alloys

Keywords
amorphous materials, nanocrystalline materials, Mössbauer spectroscopy, invar effect, Curie temperature