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Wyświetlanie 1-9 z 9
Tytuł:
Biodiversity of Balcan pine (Pinus peuce Griseb.) experimental stands in the Rogow Arboretum (Poland)
Autorzy:
Kalucka, I.
Jagodzinski, A.M.
Skorupski, M.
Kasprowicz, M.
Wojterska, M.
Dobies, T.
Slawska, M.
Wierzbicka, A.
Labedzki, A.
Nowinski, M.
Malek, S.
Banaszczak, P.
Karolewski, P.
Oleksyn, J.
Powiązania:
https://bibliotekanauki.pl/articles/38731.pdf
Data publikacji:
2013
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
biodiversity
Balcan pine
Macedonian pine zob.Balcan pine
Pinus peuce
experimental stand
tree stand
Rogow Arboretum
Polska
Opis:
The Balkan pine (Pinus peuce) is a Balkan Peninsula endemic tree species, growing in high mountains of Bulgaria, Macedonia, Serbia, Montenegro, Kosovo, Albania, and Greece and forming pure and mixed stands in subalpine forests. The paper gives a survey of biodiversity of Balkan pine stands in the Rogów Arboretum in reference to environmental data. In the plots examined, 29 taxa of vascular plants, 29 taxa of macrofungi and 127 taxa of invertebrates were recorded. The revealed diversity is discussed with regard to the data from Pinus peuce natural habitats.
Źródło:
Folia Forestalia Polonica. Series A . Forestry; 2013, 55, 4
0071-6677
Pojawia się w:
Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface Effects in Fe-Based Nanocrystalline Alloys
Autorzy:
Ślawska-Waniewska, A.
Brzózka, K.
Greneche, J. M.
Powiązania:
https://bibliotekanauki.pl/articles/1953187.pdf
Data publikacji:
1997-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
76.80.+y
61.16.Bg
75.50.Kj
Opis:
The microstructural and Mossbauer investigations of FeZrBCu nanocrystalline alloy are presented. The results obtained indicate that fine bcc-Fe grains do possess identifiable surface properties which arise from the symmetry restriction at grain boundary.
Źródło:
Acta Physica Polonica A; 1997, 91, 1; 229-232
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic Properties of Ferrofluid with Cobalt Ferrite Particles
Autorzy:
Didukh, P.
Ślawska-Waniewska, A.
Greneche, J. M.
Fannin, P. C.
Powiązania:
https://bibliotekanauki.pl/articles/2013225.pdf
Data publikacji:
2000-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Mm
76.80.+y
61.18.Fs
Opis:
Low temperature Mössbauer investigations of a diluted magnetic fluid containing ultrafine CoFe$\text{}_{2}$O$\text{}_{4}$ particles are presented. The thermal evolution of cobalt ferrite particles from the magnetically ordered state to the superparamagnetic state with the blocking temperature at about 80 K, is shown.
Źródło:
Acta Physica Polonica A; 2000, 97, 3; 587-590
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Surfaces of FeNbCuBSiP Ribbons
Autorzy:
Butvin, P.
Butvinová, B.
Kuzminski, M.
Ślawska-Waniewska, A.
Sitek, J.
Maťko, I.
Kadlečíková, M.
Powiązania:
https://bibliotekanauki.pl/articles/1201084.pdf
Data publikacji:
2014-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Gw
75.50.Tt
75.60.Ch
Opis:
Boron was partially substituted by phosphorus (3 at.%) in two Si-poor Fe-Nb-Cu-B-Si Finemets. Mostly non-significant changes were observed after vacuum annealing at 500°C, whereas equivalent Ar annealing resulted in significantly better soft-magnetic properties, which suffer from compressive surfaces stress. Possibly by hampering surface crystallization, the substitution eased the surfaces stress and reduced undesired off-axis anisotrophy at the cost of limiting the useful annealing temperature.
Źródło:
Acta Physica Polonica A; 2014, 126, 1; 152-153
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure and Magnetic Proporties of Polymer Matrix Nanocomposites
Autorzy:
Ławecka, M.
Leonowicz, M.
Kopcewicz, M.
Ślawska-Waniewska, A.
Kozubowski, J.
Dzhardimalieva, G. I.
Rosenberg, A. S.
Pomogailo, A.
Powiązania:
https://bibliotekanauki.pl/articles/2035519.pdf
Data publikacji:
2002-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.07.Bc
82.35.Np
Opis:
Structure and magnetic properties of the thermal decomposition products of Fe(III)Co(II) acrylate complex were analysed. The crystalline phases, which were found in the fully processed material, at 643 K, were Fe$\text{}_{3}$O$\text{}_{4}$, CoFe$\text{}_{2}$O$\text{}_{4}$, and CoO and had a mean particle size of about 30 nm. In the intermediate stages of the thermolysis iron was present in a form of Fe$\text{}^{III}$ (trivalent low-spin iron), Fe$\text{}^{2+}$ (divalent high-spin iron), and Fe$\text{}_{3}$O$\text{}_{4}$. The coercivity and remanence were measured versus temperature in the range of 5-300 K, in 1.1 T applied field. Both, $\text{}_{M}$H$\text{}_{c}$ and M$\text{}_{r}$, decreased showing room temperature values of 0.038 T and 7.49 mT, for coercivity and remanence, respectively. At temperatures below 200 K the hysteresis loops were asymmetrical, opened and shifted towards negative field values.
Źródło:
Acta Physica Polonica A; 2002, 102, 2; 317-321
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Accents in Modern High Saturation Nanocrystalline Fe-Rich Alloys
Autorzy:
Butvinová, B.
Butvin, P.
Maťko, I.
Janičkovič, D.
Kuzminski, M.
Ślawska-Waniewska, A.
Švec, P.
Chromčíková, M.
Powiązania:
https://bibliotekanauki.pl/articles/1030276.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Bb
75.60.-d
75.75.-c
Opis:
Post processing limits for iron-rich Fe-Cu-Si-B-P high-induction rapidly-quenched ribbons have been tested. 530°C/20 min is already too much, formed borides being the essential culprit of magnetic properties deterioration. Unlike standard Si-poor Fe-Nb-Cu-B-Si Finemets, these alloys annealed even in "technical" Ar below the upper limit do not create significant squeezing surfaces.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 711-713
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hyperfine fields and magnetoelastic surface effects in Fe72Cu1.5Nb4Si13.5B9 nanocrystalline alloy
Autorzy:
Szumiata, T.
Gawroński, M.
Górka, B.
Brzózka, K.
Blázquez-Gámez, J.
Kulik, T.
Żuberek, R.
Ślawska-Waniewska, A.
Powiązania:
https://bibliotekanauki.pl/articles/148767.pdf
Data publikacji:
2003
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
FINEMET
Mössbauer spectroscopy
nanocrystalline alloys
surface effects
surface magnetostriction
Opis:
In this work hyperfine fields of two-phase nanocrystalline Fe72Cu1.5Nb4Si13.5B9 alloys were studied in order to verify the existence of surface effects. To obtain a series of nanocrystalline samples with small grains of different sizes, a special non- -isothermal annealing procedure of an initially amorphous ribbon was applied. In the case of samples with a significant amount of crystallites, a high field (about 27.5 T) component of continuous part of the hyperfine field distribution was found that could be attributed to boundary regions between the grains and rest of the sample. The existence of the surface effects was confirmed in the magnetostrictive experiment.
Źródło:
Nukleonika; 2003, 48,suppl.1; 85-88
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Annealing Temperature on Magnetic Properties of Vitrovac 6030
Autorzy:
Lachowicz, H. K.
Popławski, F.
Żuberek, R.
Kulik, T.
Ślawska-Waniewska, A.
Kuźmiński, M.
Yu, S. C.
Dynowska, E.
Powiązania:
https://bibliotekanauki.pl/articles/2011100.pdf
Data publikacji:
1999-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Cc
75.50.Kj
75.60.Ch
Opis:
Co-Fe-Mo-Mn-Si-B metallic glass ribbon (Vitrovac 6030) was subjected to the isothermal annealing at temperatures in the range 523-873 K so as to produce a series of samples with gradually coarser microstructure. For this series of samples a giant increase in the coercivity, exceeding three orders of magnitude, is observed. This increase is interpreted in terms of the strengthening of the pinning effect of the nanocrystalline structure on the moving domain walls. It is shown that the anisotropy of the created crystallites is mainly responsible for the increase in the pinning force since the effective anisotropy seen by the wall becomes larger and larger with the gradual increase in the density and size of the grown particles.
Źródło:
Acta Physica Polonica A; 1999, 96, 3-4; 483-494
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic and Structural Study of (ZnTe)/Co Core-Shell Nanowires Grown by Molecular Beam Epitaxy
Autorzy:
Misiuna, P.
Dłużewski, P.
Wojciechowski, T.
Lewińska, S.
Ślawska-Waniewska, A.
Wawro, A.
Wiater, M.
Wojtowicz, T.
Baczewski, L.
Powiązania:
https://bibliotekanauki.pl/articles/1386894.pdf
Data publikacji:
2015-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.46.Km
75.30.Gw
75.75.+a
Opis:
Arrays of crystalline ZnTe nanowires grown by vapor-liquid-solid mechanism were covered with cobalt in a molecular beam epitaxy system. Magnetic and structural characterization of such core/shell nanowires was performed. Using scanning electron microscopy and transmission electron microscopy it was found that the mean shell thickness of cobalt was about 35% of the nominal deposition thickness. Deposited cobalt had a polycrystalline structure covering the ZnTe nanowires evenly along their length. With the increment of temperature during Co deposition the roughness of the nanowire sidewalls increases. Vibrating sample magnetometry measurements revealed that the magnetization easy-axis direction is perpendicular to the long axis of the nanowires, which is in agreement with theoretical predictions. Oxidation of Co shell does not change the anisotropy direction of such structures, however it increases their coercivity. Exchange bias effect at the interface of cobalt and cobalt oxides suggested by some authors is not responsible for such anisotropy orientation.
Źródło:
Acta Physica Polonica A; 2015, 127, 2; 517-519
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-9 z 9

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