Zobrazeno 1 - 10
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pro vyhledávání: '"Jardim, R. F."'
Akademický článek
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A systematic study of the superconducting properties in a series of arc-melted Nb-B samples close to the 1:1 composition was carried out. Powder X-ray diffraction (XRD) shows that all samples are both non-stoichiometric, and comprising of two crystal
Externí odkaz:
http://arxiv.org/abs/1708.08570
Akademický článek
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Neutron diffraction on the double perovskite Sr2YRuO6 with a quasi-face-centered cubic (FCC) lattice of Ru moments reveals planar magnetic correlations that condense into a partial long-range ordered state with coupled alternate antiferromagnetic (AF
Externí odkaz:
http://arxiv.org/abs/1209.0026
Publikováno v:
Phys. Rev. B 84, 125127 (2011)
Measurements are presented of the complex dynamic Young's modulus of NdNiO3 and Nd0.65Eu0.35NiO3 through the Metal-Insulator Transition (MIT). On cooling, the modulus presents a narrow dip at the MIT followed by an abrupt stiffening of ~6%. The anoma
Externí odkaz:
http://arxiv.org/abs/1108.3192
Autor:
Goya, G. F., Fonseca, F. C., Jardim, R. F., Muccillo, R., Carreño, N. L. V., Longo, E., Leite, E. R.
Publikováno v:
J. Appl. Phys. 93, 6531 (2003)
The dynamic magnetic properties of Ni nanoparticles diluted in an amorphous SiO2 matrix prepared from a modified sol-gel method have been studied by the frequency f dependence of the ac magnetic susceptibility \c{hi}(T). For samples with similar aver
Externí odkaz:
http://arxiv.org/abs/1103.3783
Publikováno v:
APPLIED PHYSICS LETTERS 98, 013110 (2011)
The energy barrier distribution Eb of five samples with different concentrations x of Ni nanoparticles using scaling plots from ac magnetic susceptibility data has been determined. The scaling of the imaginary part of the susceptibility Chi"(nu, T) v
Externí odkaz:
http://arxiv.org/abs/1101.4147
Autor:
Barbeta, V. B., Jardim, R. F., Torikachvili, M. S., Escote, M. T., Cordero, F., Pontes, F. M., Trequattrini, F.
Oxides RNiO3 (R = rare-earth, R # La) exhibit a metal-insulator (MI) transition at a temperature TMI and an antiferromagnetic (AF) transition at TN. Specific heat (CP) and anelastic spectroscopy measurements were performed in samples of Nd1-xEuxNiO3,
Externí odkaz:
http://arxiv.org/abs/1010.4414
Magnetic nanoparticles (NP) of magnetite (Fe3O4) coated with oleic acid (OA) and dodecanoic acid (DA) were synthesized and investigated through Transmission Electron Microscopy (TEM),magnetization M, and ac magnetic susceptibility measurements. The O
Externí odkaz:
http://arxiv.org/abs/1004.2231
Publikováno v:
Physical Review B 80, 184428 (2009)
The role of dipolar interactions among Ni nanoparticles (NP) embedded in an amorphous SiO2/C matrix with different concentrations has been studied performing ac magnetic susceptibility Chi_ac measurements. For very diluted samples, with Ni concentrat
Externí odkaz:
http://arxiv.org/abs/0912.0483