Studies of structural and magnetic properties of glass-coated nanocrystalline Fe79Hf7B12Si2 microwires

被引：0
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作者：
García, C. [1 ]
Zhukov, A. [1 ,2 ]
Gonzalez, J. [1 ]
Zhukova, V. [3 ]
Varga, R. [4 ]
del Val, J.J. [1 ]
Larin, V. [5 ]
Blanco, J.M. [2 ]
机构：
[1] Dpto. Física de Materiales, Fac. Quimicas, Universidad del Pais Vasco, 20009 San Sebastián, Spain
[2] Dpto. Física Aplicada I, EUPSD, UPV, Plaza Europa 1, 20018 San Sebastián, Spain
[3] TAMAG Ibérica S.L., Parque Tecnológico de Miramón, Paseo Mikeletegi 56, 1a Planta, 20009 San Sebastián, Spain
[4] Inst. Phys., Fac. Sci., UPJS, Park Angelinum 9, 041 54 Kosice, Slovakia
[5] MFTI, Kioshinev, Moldova
来源：
Journal of Alloys and Compounds | 2006年 / 423卷 / 1-2 SPEC. ISS.期
关键词：
In the present work we deal with the fabrication of thin of Fe79Hf7B12Si2 (low Si content) glass-coated microwire with a nanocrystalline structure and structural and coercivity characterization of such samples which can be considered as a new family of these nanocrystalline materials. Pieces of 10 cm of this microwire were annealed (300-600 °C during 1 h). The structural characteristics of the as-cast and annealed samples were determined; at room temperature; by X-ray diffraction (XRD) technique. XRD measurements allow to obtain the evolution of the grain size (15-35 nm) and relative volume fraction (5-60%) of the nanograins as a function of he annealing temperature in the annealed samples. Coercive field (Hc) of the as-cast and annealed samples has been evaluated from the hysteresis loop of the samples obtained by a conventional induction method at 100 Hz. Thermal dependence Hc is quite similar to that reported in other nanocrystalline Fe-based alloys. It slightly decreases from the as-cast state (relaxation process) showing small maximum at around 700 K (pre-nucleation of nanograins) decreasing significantly between 773-873 K (exchange coupling of the nanograins). © 2006 Elsevier B.V. All rights reserved;
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页码：116 / 119
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