Search Results - "Závéta, K."

Hematite: Morin temperature of nanoparticles with different size by Kubániová, D., Kubíčková, L., Kmječ, T., Závěta, K., Nižňanský, D., Brázda, P., Klementová, M., Kohout, J.

“…•The Mössbauer spectroscopy study of dependence of Morin transition on particle sizes.•The relative concentrations of coexisting WF and AF phases were…”
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Distribution of cations in nanosize and bulk Co-Zn ferrites by Veverka, M, Jirák, Z, Kaman, O, Knížek, K, Maryško, M, Pollert, E, Závěta, K, Lančok, A, Dlouhá, M, Vratislav, S

“…The structural and magnetic properties of Co(1-x)Zn(x)Fe2O4 ferrites (Co-Zn ferrites) are investigated in a narrow compositional range around x = 0.6, which is…”
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Magnetic phase diagram, phase transitions, and cation distribution in Pb1-xBax(Fe0.5Nb0.5)O3 perovskites by Kmječ, T., Adamec, M., Kubániová, D., Argymbek, B., Plocek, J., Dopita, M., Cejpek, P., Chlan, V., Hraníček, J., Kichanov, S.E., Závěta, K., Detlefs, B., Cesnek, M., Veverka, M., Štěpánková, H., Kohout, J.

“…Magnetic phase diagram of Pb1-xBax(Fe0.5Nb0.5)O3, x=0, 0.25, 0.5, 075, 1: TN – Néel temperature derived from MoS measurements, TG1 – occurring spin glass…”
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N₂O decomposition over Fe-FER: A Mössbauer study of the active sites by Tabor, E, Závěta, K, Sathu, N.K, Vondrová, A, Sazama, P, Sobalík, Z

“…Iron ferrierites with low iron content (Fe/Al between 0.018 and 0.072) were used as model catalysts to evaluate the participation of individual iron species,…”
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Synthesis and magnetic properties of Co1―xZnxFe2O4+γ nanoparticles as materials for magnetic fluid hyperthermia by VEVERKA, M, VEVERKA, P, JIRAK, Z, KAMAN, O, KNIZEK, K, MARYSKO, M, POLLERT, E, ZAVETA, K

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57Fe-enriched perovskites M(Fe0.5Nb0.5)O3 (M – Pb, Ba) studied by Mössbauer spectroscopy, NMR and XRD in the wide temperature range 4.2–533 K by Kmjec, T., Adamec, M., Kubaniova, D., Plocek, J., Dopita, M., Cesnek, M., Chlan, V., Bednarcik, J., Zaveta, K., Marysko, M., Kohout, J.

“…•The aim of the present work is detailed comparison of the structural and magnetic properties of double perovskites containing either Pb or Ba at the A sites…”
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Core-shell La1−xSrxMnO3 nanoparticles as colloidal mediators for magnetic fluid hyperthermia by Pollert, E., Kaman, O., Veverka, P., Veverka, M., Maryško, M., Záv ta, K., Ka enka, M., Lukeš, I., Jendelová, P., Kašpar, P., Burian, M., Herynek, V.

“…Core-shell nanoparticles consisting of La0.75Sr0.25MnO3 cores covered by silica were synthesized by a procedure consisting of several steps, including the…”
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Hyperfine interactions in nanocrystallized NANOPERM-type metallic glass containing Mo by Cesnek, M., Kubániová, D., Kohout, J., Křišťan, P., Štěpánková, H., Závěta, K., Lančok, A., Štefánik, M., Miglierini, M.

“…NANOPERM-type alloy with chemical composition Fe 76 Mo 8 CuB 15 was studied by combination of 57 Fe Mössbauer spectroscopy and 57 Fe( 10 B, 11 B) nuclear…”
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Search of new core materials for magnetic fluid hyperthermia: Preliminary chemical and physical issues by Pollert, E., Veverka, P., Veverka, M., Kaman, O., Závěta, K., Vasseur, S., Epherre, R., Goglio, G., Duguet, E.

“…Today the use of nanoparticles based on magnetite Fe 3O 4 or maghemite γ-Fe 2O 3 for magnetic fluid hyperthermia (MFH) application is preferred for evident…”
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Magnetic Nanoparticles for Therapy and Diagnostics by Pollert, E., Kaspar, P., Zaveta, K., Herynek, V., Burian, M., Jendelova, P.

“…The research and utilization of the magnetic nanoparticles in, e.g., biology and medicine have been preferentially oriented on magnetite Fe 3 O 4 and maghemite…”
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Magnetic poly(glycidyl methacrylate) microspheres containing maghemite prepared by emulsion polymerization by Pollert, E., Knížek, K., Maryško, M., Závěta, K., Lančok, A., Boháček, J., Horák, D., Babič, M.

“…Magnetic poly(glycidyl methacrylate) (PGMA) microspheres were prepared by emulsion polymerization of glycidyl methacrylate (GMA) in the presence of…”
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Magnetic properties of nanogranular CoxCu1-x structures by ZAVETA, K, LACHOWICZ, H. K, MARYSKO, M, ARNOLD, Z, DŁUZEWSKI, P

“…CoCu nanogranular specimens with Co concentration of 5,9 and 15 at. % were produced by annealing the parent melt-spun ribbon at 450 and 600 deg C for 1 h…”
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Magnetic phases in nanogranular Co–Cu structures by Lachowicz, H.K., Závěta, K., Maryško, M., Vinai, F.

“…CoCu nanogranular materials with Co concentration of 5, 9, and 15at% were produced by annealing the starting melt-spun ribbons at 450°C for 1h. Their…”
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Superparamagnetic properties of γ-Fe2O3 particles: Mössbauer spectroscopy and d.c. magnetic measurements by Závěta, K., Lančok, A., Maryško, M., Pollert, E., Horák, D.

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Mössbauer studies on ultraporous Fe-Oxide/SiO2 aerogel by Lančok, A., Závěta, K., Popovici, M., Savii, C., Gich, M., Roig, A., Molins, E., Barčová, K.

“…Magnetic aerogels with very low volume density of ∼0.2 g/cm3 were prepared by sol-gel method and supercritical drying. The resulting materials were monolithic…”
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Mössbauer studies of magnetic Fe2O3/SiO2 nanocomposites by Lančok, A., Závěta, K., Savii, C., Barčová, K.

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A temperature and magnetic field dependence Mössbauer study of ɛ-Fe2O3 by Rehspringer, J.-L., Vilminot, S., Niznansky, D., Zaveta, K., Estournes, C., Kurmoo, M.

“…ɛ-Fe2O3 was synthesized as nanoparticles by a pre-vacuum heat treatment of yttrium iron garnet (Y3Fe5O12) in a silica matrix at 300-C followed by sintering in…”
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Dependence of the magnetic moment of iron nitrides on the presence of defect phase by Lančok, A, Závěta, K, Vratislav, S, Bezdička, P, Paseka, I

“…The samples were prepared by nitriding iron powder in a mixture of H 2 and NH 3 at 700°C, quenching to liquid N 2, milling, and annealing at 130–150°C. They…”
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Magnetic properties of partially devitrified metallic glasses by Lachowicz, H.K., Zaveta, K., Slawska-Waniewska, A.

“…This paper presents a review of selected experiments which have been carried out using partially devitrified Fe- and Co-based metallic glasses. It is shown…”
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Influence of temperature and pressure on magnetic properties of granular Co–Cu system by Lachowicz, H.K., Závěta, K., Maryško, M., Arnold, Z.

“…The effect of temperature (10–300 K) and high hydrostatic pressure (7 kbar) on the magnetic properties of nanometer-sized Co-particles embedded in the…”
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