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    An alternative measurement method for magneto-impedance effect in amorphous alloys
    (Elsevier Science Sa, 2001) Atalay, F; Atalay, S
    An alternative measurement method for giant magneto-impedance (GMI) effect is described. The method measures pulse width instead of induced voltage between the ends of wire as a function of external applied field. In the measurement method two ac signals are applied to the wire and it has been shown that by changing the amplitude of the low-frequency ac signal a large variation in the field dependence of pulse width can be obtained. (C) 2001 Elsevier Science B.V. All rights reserved.
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    Influence of hydrogen charging on magnetic and magnetoimpedance properties of FeSiB and CoFeSiB amorphous wires
    (Elsevier Science Sa, 2005) Atalay, F; Atalay, S
    The magnetic and magnetoimpedance (MI) effect properties of amorphous ferromagnetic Fe77.5Si7.5B15 and (Co0.94Fe0.06)(72.5)Si12.5B15 were studied before and after hydrogen charging by an electrochemical method. The hydrogen charging was carried out at 25 degrees C and in a stirred solution by applying a constant current density of 20 mA/cm(2) for 1 h. It was found that the saturation magnetization of FeSiB wire decreased from 1.6 to 1.345 T and the magnitude of the MI effect decreased from 24.4 to 7.1 after hydrogen charging. No remarkable variation in the shape of the magnetization loop and the MI effect in CoFeSiB wire were observed after hydrogenation. (c) 2005 Elsevier B.V. All rights reserved.
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    Infrared absorption study of Fe2O3-CaO-SiO2 glass ceramics
    (Elsevier Science Sa, 2001) Atalay, S; Adiguzel, HI; Atalay, F
    The ceramic lasses were prepared from extra pure reagents of Fe2O3, CaO and SiO2 powders. The 15 g batch was melted at 1550 degreesC, for 2 h in a platinum crucible. The glass structure was obtained by pouring the melt into a copper plate and pressing quickly by another copper plate. The glass structure was checked by XRD. IR studies were first made in ceramic glasses for various Fe contents. The 19.5Fe(2)O(3). 40.25CaO . 40.25SiO(2) glass sample was annealed at 750 degreesC under hydrogen atmosphere, hi the annealed sample new vibration bands were observed which were absent in the untreated samples, It was observed that the new peaks are mainly due re, the formation of beta -CaSiO3 (wollastonite) phases. (C) 2001 Elsevier Science B.V. All rights reserved.