Structure, electrical and magnetic properties of nanocrystalline materials composed of carbon and 3d transition metals
Investigator: Ing. Oldřich Schneeweiss, DrSc.
Number of Project: 202/04/0221
Agency: Czech Science Foundation
Duration: 01. 01. 2004 - 31. 12. 2006
The aim of the project is the research on nanocrystalline materials based on carbon and 3d transition metals. The materials studied will be composed of nanocrystalline metal particles or clusters encapsulated or covered by carbon in the forms of graphite, amorphous matter, fullerene, or nanotubes. The research will be carried out with samples obtained by spark synthesis and laser pyrolysis and also by technologies of surface and film preparation (sputtering, ion implantation). The dependence will be followed between structure and phase composition and the parameters of the synthesis and subsequent thermal treatment. The electric and magnetic properties will be studied with respect to the influence of the structure and phase composition to understand the role of the interface between carbon and metal nanoparticles. Attention will also be paid to the influence of the atmosphere composition on the kinetics and products of their thermal transformation. The thermal transformations will be interpreted in terms of their mechanism and thermodynamic properties. The entire scale of carbon structures and metal nanoparticles will be studied by a combination of microscopic (TEM, HRTEM), diffraction (X-ray, neutron), spectral (Mössbauer, XPS, Raman spectroscopies), and electrochemical methods, that will allow both teams of applicants to collaborate efficiently.
B. David, O. Schneeweiss, M. Mashlan, E. Šantavá, I. Morjan:
Low-temperature magnetic properties of Fe3C/iron oxide nanocomposite
J. Magn. Magn. Mater. 316 (2007) 422-425
Y. Jirásková, K. Zábranský, I. Turek, J. Buršík, D. Jančík:
Microstructure and physical properties of mechanically alloyed Fe-Mo powder
J. Alloys and Compounds 477 (2009) 55-61
Jirásková Y., Zábranský K., Vůjtek M., Životský O.:
Changes in the hyperfine interactions in the Fe80Nb3Cu1B16 metallic glass under tensile loading
J. Magn. Magn. Mater., 322 (2010) 1939-1946
Životský O., Jirásková Y., Hrabovská K., Pištora J., de Resende VG.:
Surface Magnetic Properties and Mossbauer Spectroscopy of As-Quenched FeNiMoCuB Ribbons
IEEE Transactions on Magnetics, 46 (2010) 369-372
I. Turek, K. Carva:
Spin-mixing conductances of Ni-based films attached to Cu(100) leads
Acta Physica Polonica A 113 (2008) 11-14
J. Kudrnovský, F. Máca, I. Turek, J. Redinger:
Substrate-induced antiferromagnetism of a Fe monolayer on the Ir(001) surface
Phys. Rev. B, 80 (2009) 064405
V. Ćosović, T. Žák, N. Talijan, A. Grujić and J. Stajić-Trošić:
Phase composition, structure and magnetic behaviour of low neodymium rapid-quenched Nd–Fe–B alloys
J. Alloys Compd. 456 (2007) 251–256
T. Žák, N. Talijan, V. Ćosović and A. Grujić:
NdFeB permanent magnets with various Nd Content
Acta physica polonica A, 113 (2008) 279–282
N. Talijan, V. Ćosović, A. Grujić, J. Stajić-Trošić and T. Žák:
Thermomagnetic behaviour and microstructure of rapidly quenched Nd4.5Fe77B18.5 alloy
Acta physica polonica A, 113, (2008) 525–528
N. Talijan, V. Ćosović, J. Stajić-Trošić, A. Grujić, T. Žák, Z. Lee and V. Radmilović:
Thermomagnetic Analysis of Nanocrystalline Nd4.5Fe77B18.5 Alloy
Materials Transactions, 50 (2009) 2302-2307
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Last update
19. 09. 2017