Search

Your search keyword '"Kalska, Beata"' showing total 10 results
Start Over Author "Kalska, Beata"
10 results on '"Kalska, Beata"'

3. Magnetic ordering in a [Fe/Co](35) BCC film studied by nuclear resonant reflectometry

Author

Andreeva, M. A., Monina, N. G., Lindgren, Bengt, Häggström, Lennart, Kalska, Beata, Andreeva, M. A., Monina, N. G., Lindgren, Bengt, Häggström, Lennart, and Kalska, Beata

Abstract

An analysis of the angular dependences of nuclear resonant reflectivity time spectra for different models of magnetic ordering in films reveals an ambiguity in the magnetization direction determined from spectra measured at one orientation of the sample. This analysis explains features in the spectra of the nuclear resonant reflectivity from a MgO/[Fe(6 ML)/Co(3 ML)]35/V (1 nm) film measured before and after sample rotation by 90° about the normal to the surface. It is shown that the spectrum measured only at one orientation of the sample determines only the effective azimuth angle of magnetization γeff. This does not exclude the occurrence of a domain structure, while the angle γeff does not correspond to the true direction of the preferred orientation of magnetization. The results of measurements at two orientations of the sample can be satisfactorily matched using a model that considers a coherent mixture of states with magnetization directed along the 〈110〉 axis (77%) and with a chaotic orientation of the magnetic hyperfine field B hf in the film plane for the other nuclei.

Published
2007
Full Text
View/download PDF

5. Interface sensitive investigation of 57Fe/Cr superstructure by means of nuclear resonance standing waves in time scale.

Author

Andreeva, Marina.A, Semenov, V.G, Lindgren, Bengt, Häggström, Lennart, Kalska, Beata, Chumakov, A.I, Leupold, O, Rüffer, R, Prokhorov, K.A, Salashchenko, N.N, Andreeva, Marina.A, Semenov, V.G, Lindgren, Bengt, Häggström, Lennart, Kalska, Beata, Chumakov, A.I, Leupold, O, Rüffer, R, Prokhorov, K.A, and Salashchenko, N.N

Abstract

With synchrotron pulsed radiation we have measured the time spectra of reflectivity for several grazing angles in vicinity of the Bragg peak for a microcrystalline periodical (Fe/Cr)(26) multilayer. In such a way a "scan" of hyperfine field distribution o

Published
2002

7. Hyperfine Field Distributions in Fe/V multilayers

Author

Nordström, Erik, Kalska, Beata, Häggström, Lennart, Blomquist, Peter, Wäppling, Roger, Nordström, Erik, Kalska, Beata, Häggström, Lennart, Blomquist, Peter, and Wäppling, Roger

Published
2002

8. Magnetic properties of monocrystal 57FeV multilayers investigated by CEMS, Nuclear Resonance Reflectivity in the Time Domain and Polarized Neutron Scattering

Author

Kalska, Beata, Häggström, Lennart, Lindgren, Bengt, Blomquist, Peter, Wäppling, Roger, Andreeva, Marina.A, Nikitenko, Yu.V, Proglyado, V.V, Aksenov, V.L, Semenov, V.G, Schumakov, A.I, Leupold, O, Rüffer, R, Kalska, Beata, Häggström, Lennart, Lindgren, Bengt, Blomquist, Peter, Wäppling, Roger, Andreeva, Marina.A, Nikitenko, Yu.V, Proglyado, V.V, Aksenov, V.L, Semenov, V.G, Schumakov, A.I, Leupold, O, and Rüffer, R

Published
2001

10. Thermal Stability of LiFePO4?-?Based Cathodes

Author

Andersson, Anna S., Thomas, John O., Kalska, Beata, and Haggstrom, Lennart

Abstract

The capacity and cyclability of solid-state synthesized laminate cells of type have been studied at 23, 40, and . Larger capacities were obtained for cells cycled at the elevated temperatures. No evidence was found of potentially troublesome reactions between the different components of the cells under charged and discharged conditions up to . Remanant X-ray diffraction peaks were observed from the delithiated phase for cells cycled at ambient temperature. Mossbauer spectroscopy showed different residual amounts of at the different temperatures: 22, 7, and 8% at 23, 40, and , respectively. The amount of residual was thus largest for cells cycled at room temperature, suggesting that slow kinetics hinder effective lithium insertion. (c)2000 The Electrochemical Society

Published
2000

Catalog

Books, media, physical & digital resources
See catalog results