Zobrazeno 1 - 10
of 149
pro vyhledávání: '"C. Djega-Mariadassou"'
Publikováno v:
IEEE Transactions on Magnetics. 44:4202-4205
The effect of carbonation on the structure and the magnetic properties of polycrystalline YTiFe11-x Six (0 les x les 2) have been investigated by means of x-ray diffraction (XRD) at room temperature and magnetic measurements at low temperature. The a
Publikováno v:
Journal of Alloys and Compounds. 455:35-41
Sm 2 Fe 17− x Co x C 3 ( x ≤ 2) were synthesized by means of reaction with solid hydrocarbon at 693 K on Sm 2 Fe 17− x Co x powders obtained by high energy milling and subsequent annealing at 1125 °C. X-ray diffraction analysis by Rietveld met
Publikováno v:
Journal of Magnetism and Magnetic Materials. 316:e116-e119
YFe 11− x Co x Ti ( x =0, 0.5, 1, 1.5, 2) alloys with ThMn 12 -type structure were synthesized by induction melting and subsequent carbonation. The second ( K 1 ) and the fourth ( K 2 ) order anisotropy constants and the anisotropy field ( μ 0 H A
Publikováno v:
Intermetallics. 15:607-614
The nanocrystalline carbides Sm 2 Fe 17− x Ga x C 2 ( x ≤ 2) were prepared with a two-step method: high-energy milling with annealing at 1050 °C and carbonation at 420 °C by a solid–solid reaction with heavy hydrocarbon. The Rietveld analysis
Publikováno v:
Journal of Alloys and Compounds. 426:22-25
The controlled nanocrystallization of Nd–Fe–Co–Al–B bulk amorphous tunes the coercivity, which is enhanced to 23 kOe, with a Curie temperature of 692 K. Ferromagnetic Nd 2 (Fe,Co,Al) 14 B nanocrystallites isolated by amorphous clusters coexis
Publikováno v:
Journal of Physics: Condensed Matter. 18:3845-3859
SmFe9−yGaxC carbides (0≤x≤1) were prepared by a two-step method of powder high-energy milling with annealing between 873 and 1200 K and a subsequent carbonation with heavy hydrocarbon at 693 K. The x-ray diffraction analysis with the Rietveld t
Publikováno v:
Molecular Crystals and Liquid Crystals. 417:47-55
The presence of nanocrystalline SmFe9−xSix(x ≤ 1)phase, has been evidenced in Sm-Fe-Si system. This crystallizes in a hexagonal structure having P6/mmm space group. The X-ray analyses show that silicon is located in 3g sites. The57Fe Mősbauer sp
Publikováno v:
Journal of Alloys and Compounds. 360:14-20
The crystallographic and the Curie temperature of the Sm2Fe17−xCrxC2 (x=0.5, 1, 1.5 and 2) carbides have been extensively studied. X-ray diffraction studies have shown that all these alloys are approximately single phases corresponding to the Th2Zn
Publikováno v:
Journal of Physics: Condensed Matter. 15:5615-5620
The structure and magnetic properties of high-energy-milled R 40 Fe 30 Co 15 Al 10 B 5 (R = Nd, Pr) have compounds been investigated by means of x-ray diffraction, high-resolution transmission electron microscopy, magnetic measurements, and Mossbauer
Publikováno v:
Journal of Alloys and Compounds. 351:24-30
Samples of Sm2Fe17−xCrx (x=0.5–3) ball-milled and subsequently annealed at 1425 K, were studied by X-ray diffraction (XRD) using the Rietveld method coupled to Curie temperature Tc measurements and Mossbauer spectroscopy. XRD investigation have s