Autor: Byszewski, P. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Weak Ferromagnetism of Fe Intercalated Fullerides
Autorzy:: Byszewski, P.
Diduszko, R.
Baran, M.
Tematy:: 78.20.Ls
76.70.Hb
78.55.Kz; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1929859.pdf Link otwiera się w nowym oknie
Opis:: The magnetic properties of C$\text{}_{60}$Fe$\text{}_{x}$ resemble spin glass with the freezing onset above 200 K. The unusual magnetization behavior at intermediate temperatures is ascribed to bonds reorganization.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Fe Clusters in Fe Intercalated Fullerite
Autorzy:: Sobczak, E.
Żymierska, D.
Byszewski, P.
Traverse, A.
Tematy:: 61.10.Ht
61.46.+w
71.20.Tx; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1955842.pdf Link otwiera się w nowym oknie
Opis:: The local structure around Fe ions in the C$\text{}_{60}$Fe$\text{}_{2}$ fullerites before and after heat treatment in temperature of 850 K was investigated by means of Fe K edge X-ray absorption near edge structure and extended X-ray absorption near edge structure methods. The X-ray absorption measurements were performed at liquid nitrogen temperature using synchrotron radiation in transmission mode. The X-ray absorption near edge structure and extended X-ray absorption near edge structure studies showed that the heat treatment of the C$\text{}_{60}$Fe$\text{}_{2}$ fullerite at temperature 850 K causing an irreversible transition from monoclinic to fcc structure is accompanied with changes in the state of Fe ions, part of them forms clusters in bcc structure, while others turn to Fe$\text{}^{3+}$ ions bonded to fullerenes.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Free Radicals in K and Rb Admixtured Fullerene C$\text{}_{60}$
Autorzy:: Stankowski, J.
Kempiński, W.
Byszewski, P.
Trybuła, Z.
Tematy:: 76.30.Rn
74.70.Wz; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1929831.pdf Link otwiera się w nowym oknie
Opis:: Molecules of C$\text{}_{60}$ form Van der Waals type crystals. The observations reported here concern EPR investigations of such C$\text{}_{60}$ samples with only a slight amount of Rb or K. Detected defects are (C$\text{}_{60}$)$\text{}^{+}$ or (C$\text{}_{60}$)$\text{}^{y-}$ ion-radicals. A hole (h) or trapped electron (t) are localized on one fullerene ball. In the case of potassium fullerites C$\text{}_{60}$:K the line shape of EPR signal was of the Dysonian form which is characteristic of conducting electrons in metal. The EPR lines of holes (C$\text{}_{60}$)$\text{}^{+}$ are characterized by g$\text{}_{h}$ ≥ g$\text{}_{0}$ whereas for electrons g$\text{}_{t}$ is below the value g$\text{}_{0}$ = 2.0023 characteristic of a free electron (g$\text{}_{t}$ ≤ g$\text{}_{0}$). The EPR linewidth 2ΔB$\text{}_{1s}^{h}$ of the (C$\text{}_{60}$)$\text{}^{+}$ weakly increased with decreasing temperature whereas the EPR linewidth attributed to the electron 2ΔB$\text{}^{t}$$\text{}_{1s}$ significantly decreases with decreasing temperature. The C$\text{}_{60}$:K sample reached superconducting phase below T$\text{}_{c}$ = 11 K which is significantly less than T$\text{}_{c}$ = 16.5 K observed for K$\text{}_{x}$C$\text{}_{60}$ where 2 ≤ x ≤ 4.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Preparation and Some Properties of Carbon Nanotubes
Autorzy:: Byszewski, P.
Ukalski, K.
Baran, M.
Dlużewski, P.
Kozłowski, M.
Tematy:: 75.20.-g
81.35.+k; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1933400.pdf Link otwiera się w nowym oknie
Opis:: Carbon nanotubes can be grown in the DC electric arc, they grow covered by a turbostratic graphite. The mechanism of the tubes growth is discussed. The magnetic susceptibility of samples, which contained aligned nanotubes exhibits anisotropic oscillatory behavior, which is ascribed to spatial quantization of the energy levels.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: C$\text{}_{60}$FeC$\text{}_{60}$ Complexes in Fe Intercalated Fullerite Studied by X-Ray Absorption
Autorzy:: Sobczak, E.
Traverse, A.
Nietubyć, R.
Swilem, Y.
Byszewski, P.
Żymierska, D.
Tematy:: 61.10.Ht
61.48.+c
71.20.Tx; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/1963400.pdf Link otwiera się w nowym oknie
Opis:: The aim of Fe K edge XANES and EXAFS studies is to reveal the local structure around Fe ions in C$\text{}_{60}$Fe$\text{}_{x}$ intercalated fullerites. The measurements are performed in transmission mode at LN$\text{}_{2}$ temperature for C$\text{}_{60}$Fe$\text{}_{x}$ powder samples and other materials: ferrocene Fe(C$\text{}_{5}$H$\text{}_{5}$)$\text{}_{2}$, Fe metal foil and α-Fe$\text{}_{2}$O$\text{}_{3}$. The main result is that the XAFS spectra of the C$\text{}_{60}$Fe$\text{}_{2}$ intercalate is almost identical to that of ferrocene and very different from α-Fe and α-Fe$\text{}_{2}$O$\text{}_{3}$. The results support opinion that in the C$\text{}_{60}$Fe$\text{}_{x}$ intercalates the ferrocene-like bonds in complexes C$\text{}_{60}$FeC$\text{}_{60}$ are formed. Additionally, the XAFS spectra showed that neither remarkable amount of Fe metallic clusters nor oxidized iron particles are present in the C$\text{}_{60}$Fe$\text{}_{x}$ sample.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Solid Solutions of Oxide Crystals as Substrates for Epitaxial Layer Depositions
Autorzy:: Berkowski, M.
Fink-Finowicki, J.
Aleksijko, R.
Diduszko, R.
Byszewski, P.
Kikalejshvili-Domukhovska, R.
Tematy:: 81.10.-h
81.10.Fq
61.10.Nz
74.78.Bz; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/2046725.pdf Link otwiera się w nowym oknie
Opis:: We present results of investigation on growth of solid solution crystals with perovskites and K$\text{}_{2}$NiF$\text{}_{4}$ structures used as substrates for epitaxy. Perovskite single crystals with no twins and crystals with K$\text{}_{2}$NiF$\text{}_{4}$ structure with the lattice parameter in the range 3.876-3.819Å and 3.754 to 3.688Å, respectively, can be grown. Here preliminary results on investigation on growth of other solid solution crystals with the lattice constant from 3.946 to 3.688Å are also presented thus covering the whole interesting range for depositing oxide materials. These crystals can be grown by the Czochralski method that secures their high structural quality. Discussed crystals are resistant to reaction with the deposited oxide layers.
Dostawca treści:: Biblioteka Nauki

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