Differential scanning calorimetry, hysteresis measurements, X-ray diffraction, Mössbauer spectroscopy and transversal Kerr effect have been used to study the thickness and temperature dependence of magnetic properties and crystalline state of Fe84Zr3.5Nb3.5B8Cu1 (at.%) thin films. Results indicate that a decrease of the saturation magnetization with increasing film thickness can be ascribed to the presence of a crystalline -Fe phase at the early stages of film growth, followed by the deposition of the amorphous alloy. Thinner films, which have a significant crystalline phase in the as-prepared state, display less prominent crystallization features, whereas thicker films, with a significant amorphous phase in the as-prepared state, are characterized by much more pronounced crystallization effects, that are confirmed by Mössbauer and Transversal Kerr Effect measurements. Progressive thinning of a film by means of sputter etching allows to reduce the amorphous component, leading to the expected increase of saturation magnetization as the thickness decreases.

Thickness dependence of crystalline state in FeZrNbCuB thin films obtained by sputter deposition / Coisson, Marco; F., Celegato; Olivetti, ELENA SONIA; Tiberto, PAOLA MARIA; F., Vinai; S. N., Kane; E. A., Gan'Shina; A. I., Novikov; N. S., Perov. - In: JOURNAL OF ALLOYS AND COMPOUNDS. - ISSN 0925-8388. - 509:14(2011), pp. 4688-4695. [10.1016/j.jallcom.2011.01.036]

Thickness dependence of crystalline state in FeZrNbCuB thin films obtained by sputter deposition

COISSON, MARCO;F. CELEGATO;OLIVETTI, ELENA SONIA;TIBERTO, PAOLA MARIA;
2011

Abstract

Differential scanning calorimetry, hysteresis measurements, X-ray diffraction, Mössbauer spectroscopy and transversal Kerr effect have been used to study the thickness and temperature dependence of magnetic properties and crystalline state of Fe84Zr3.5Nb3.5B8Cu1 (at.%) thin films. Results indicate that a decrease of the saturation magnetization with increasing film thickness can be ascribed to the presence of a crystalline -Fe phase at the early stages of film growth, followed by the deposition of the amorphous alloy. Thinner films, which have a significant crystalline phase in the as-prepared state, display less prominent crystallization features, whereas thicker films, with a significant amorphous phase in the as-prepared state, are characterized by much more pronounced crystallization effects, that are confirmed by Mössbauer and Transversal Kerr Effect measurements. Progressive thinning of a film by means of sputter etching allows to reduce the amorphous component, leading to the expected increase of saturation magnetization as the thickness decreases.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11696/31684
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