Magnetic properties of bulk amorphous Fe61Co10Ti3Y6B20 alloy near the Curie temperature

• Autorzy: Błoch K.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The aim of this study was to conduct studies of the magnetic properties for a massive amorphous alloy Fe61Co10Ti3Y6B20. Design/methodology/approach: The investigated samples were prepared in the form of rods by using the suction-casting method. The material structures were investigated using X-ray. The magnetic properties were studied using a completely automated set up for measuring susceptibility and its disaccommodation. The magnetization as a function of magnetizing field was measured using magnetic Faraday's weight as a part of magnetocaloric effect studies. Findings: In the framework of this study, the structure and magnetic properties of the solid amorphous alloy Fe61Co10Ti3Y6B20 was examined. On the basis of the of X-ray diffraction obtained material was found to be amorphous alloy. Magnetic studies were carried out using a fully computerized system for magnetic susceptibility measures and its disaccommodation. It was showed that both susceptibility curve and isochoric disaccommodation curve maximum occurs in the transition from the state of ferromagnetic material into a paramagnetic state. This peak is called the Hopkinson maximum. From the curves of the magnetic susceptibility as a function of the temperature the value of the Curie temperature was established to about 550 K. Using the measurements of magnetisation as a function of magnetic field strength Arrott curves were constructed. The positive slope of the curves demonstrates the fact that the phase transition ferro-para is of the second kind. Using the magnetization curves the change of the magnetic entropy was determined. The biggest change of the magnetic entropy occur near the Curie temperature. Research limitations/implications: Based on studies carried out as part of this work it was found that the magnetic properties of investigated alloy, ie. magnetic susceptibility and its disaccommodation, are showing a clear change near the Curie temperature. Originality/value: The study of magnetic properties and their behavior in the vicinity of the Curie temperature.

Słowa kluczowe

EN

bulk alloy; Curie temperature; disaccommodation; permeability; magnetic entropy; Arrot's plots

PL

objętość stopu; temperatura Curie; dezakomodacja; przepuszczalność

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2015
• Tom: Vol. 73, nr 2
• Strony: 80--85
• Opis fizyczny: Bibliogr. 20 poz., rys.

Twórcy

autor

Błoch K.

• Institute of Physics, Faculty of Materials Processing Technology and Applied Physics, Czestochowa University of Technology, Al. Armii Krajowej 19, 42-200 Częstochowa, Poland

Bibliografia

• [1] M. Nabiałek, J. Zbroszczyk, J. Olszewski, M. Hasiak, W. Ciurzyńska, K. Sobczyk, J. Świerczek, J. Kaleta, A. Łukiewska, Microstructure and magnetic properties of bulk amorphous and nanocrystalline Fe61Co10Zr2.5Hf2.5Nb2W2B20 alloy, Journal of Magnetism and Magnetic Materials 324 (2008) 787-791.
• [2] J. Gondro, J. Świerczek, J. Olszewski, J. Zbroszczyk, K. Sobczyk, W.H. Ciurzyńska, J. Rzącki, M. Nabiałek, Magnetization behavior and magnetocaloric effect in bulk amorphous Fe60Co5Zr8Mo5W2B20 alloy, Journal of Magnetism and Magnetic Materials 324 (2012) 1360-1364.
• [3] J. Gondro, K. Błoch, M. Nabiałek, S. Wallters, Magnetocaloric effect in amorphous and partially crystallized Fe-Zr-Nb-Cu-B alloy, Acta Physica Polonica A 127 (2015) 606-607.
• [4] A. Inoue, A. Takeuchi, T. Zhang, Ferromagnetic Bulk Amorphous Alloys, Metallurgical and Materials Transactions A 29 (1998) 1779-1793.
• [5] A. Inoue, Bulk amorphous alloys, Trans Tech Publications, Zurich, 1998-1999.
• [6] I. Zaharie, On the structural relaxation of Fe65Gd5Cr10B20amorp hous alloys, Journal of Alloys and Compounds 481 (2009) 173-175.
• [7] H.-W. Kwon, Experimental study of Hopkinson effect in HDDR-treated Nd15Fe77B8 and Sm2Fe17Nx materials, Journal of Magnetism and Magnetic Materials 239 (2002) 447-449.
• [8] N.S. Gajbhiye, S. Prasad, G. Balaji, Experimental Study of Hopkinson Effect in Single Domain CoFe2O4 Particles, IEEE Transactions on Magnetics 35 (1999) 2155-2161.
• [9] J. Olszewski, Microstructure and processes of demagnetization magnetically hard and soft iron alloys, Technical University of Czestochowa Publishing Hause, 2006, 89.
• [10] G. Bordin, G. Buttino, A. Cecchetti, M. Poppi, Temperature dependence of magnetic properties of a Co-based alloy in amorphous and nanostructured phase, Journal of Magnetism and Magnetic Materials 195 (1999) 583-587.
• [11] P. Mazumdar, S.M. Bhagat, Amorphous magnetic alloys near critical concentration: low field reversible dc magnetization, Journal of Magnetism and Magnetic Materials 66 (1987) 263-280.
• [12] R. Reisser, M. Seeger, H. Kronmüller, The magnetic phase transition in amorphous rare earth-transition metal alloys, Journal of Magnetism and Magnetic Materials 128 (1993) 321-340.
• [13] A. Arrott, J.E. Noakes, Approximate equation of state for nickel near its critical temperature, Physical Review Letters19 (1967) 786-789.
• [14] V.K. Pecharsky, K.A. Gschneidner Jr., Magnetocaloric effect and magnetic refrigeration, Journal of Magnetism and Magnetic Materials 200 (1999) 44-56.
• [15] A. Inoue, Bulk amorphous alloys with soft and hard magnetic properties, Materials Science and Engineering A226-228 (1997) 357-363.
• [16] Z. Obuszko, Laboratory equipment and techniques. A further modification of a strip magnetic balance with controllable sensitivity, Acta Physica Polonica 33 (1968) 673.
• [17] J.S. Blázquez, V. Franco, C.F. Conde, A. Conde, L.F. Kiss, Thermal and microstructural dependence of theinitial permeability of Co60Fe18Nb6(B,Cu)16 alloys, Journal of Alloys and Compounds 431 (2007) 100-106.
• [18] G. Bordin, G. Buttino, A. Cecchetti, M. Poppi, Temperature dependence of magnetic properties of a Co-based alloy in amorphous and nanostructured phase, Journal of Magnetism and Magnetic Materials 195 (1999) 583-587.
• [19] S. K. Banerjee, On a generalized approach to first and second order magnetic transitions, Physics letters 12 (1964) 16-17.
• [20] J. Mira, J. Rivas, F. Rivadulla, C. Vazquez-Vazquez, M.A. Lopez-Quintela, Change from first - to second - order magnetic phase transition in La2/3(Ca,Sr)1/3MnO3 perovskites, Physical Review B 60/5 (1999) 2998-3001.