Autor: Helberg, H. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Optical Absorption of Polymer Films Doped with BEDT-TTF Polyiodides
Autorzy:: Helberg, H. W.
Staerk, D.
Ulański, J.
Jeszka, J. K.
Powiązania:: https://bibliotekanauki.pl/articles/1933405.pdf
Data publikacji:: 1995-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.40.Ha
78.30.Jw
74.70.Kn
Opis:: Conducting reticulate doped polymeric films containing BEDT-TTF iodide crystalline network were annealed in order to transform the crystallites into crystal phases with metallic conductivity. Measured optical absorption spectra show that annealing shifts the absorption band to higher frequencies and increases the transparency of the films. This behavior corresponds to the transformation of the α-phase into the superconducting α$\text{}_{t}$-phase observed in (BEDT-TTF)$\text{}_{2}$I$\text{}_{3}$ single crystals.
Źródło:: Acta Physica Polonica A; 1995, 87, 4-5; 893-897
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: New Insights into the Reentry Behavior of Deuterated DCNQI Cu-Salts by Microwave Measurements
Autorzy:: Predak, S.
Helberg, H. W.
Von Schütz, J. U.
Powiązania:: https://bibliotekanauki.pl/articles/1933359.pdf
Data publikacji:: 1995-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 72.80.Le
72.60.+g
78.70.Gq
Opis:: The microwave conductivity of the copper salt of DCNQI (N,N'-Dicyanoquinodiimine) with two methyl side groups (undeuterated, h$\text{}_{8}$), the fully deuterated salt (d$\text{}_{8}$), the salt with only the methyl groups deuterated and of alloys of undeuterated and deuterated salts was measured. The microwave conductivity (10.2 GHz) qualitatively follows the dc conductivity. The difference is in the window of diminished conductivity between phase transition and reentry, where the microwave conductivity is higher than the dc conductivity. This indicates the existence of a crystal fraction with higher (metallic) conductivity (portion: ≈ 1‰) not seen by dc methods.
Źródło:: Acta Physica Polonica A; 1995, 87, 4-5; 791-795
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Microwave Conductivities of Polymer Films Doped with BEDT-TTF Polyiodides
Autorzy:: Staerk, D.
Helberg, H. W.
Ulański, J.
Jeszka, J. K.
Powiązania:: https://bibliotekanauki.pl/articles/1933365.pdf
Data publikacji:: 1995-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 72.80.Le
72.60.+g
78.70.Gq
Opis:: Conducting reticulate doped polymeric films containing BEDT-TTF iodide crystalline networks have been annealed in order to transform the crystallites into crystal phases with metallic conductivity. The microwave conductivity of these films was measured before and after annealing. The temperature dependence of the conductivity changes dramatically with optimal annealing temperatures and times. This change in the behavior corresponds to the transformation of the α-phase into the superconducting α$\text{}_{t}$-phase observed in (BEDT-TTF)$\text{}_{2}$I$\text{}_{3}$ single crystals.
Źródło:: Acta Physica Polonica A; 1995, 87, 4-5; 797-800
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: D.C. Conductivity of Polymer Composites with (BEDT-TTF)$\text{}_{2}$I$\text{}_{3}$ Superconductor
Autorzy:: Ulański, J.
Jeszka, J. K.
Polanowski, P.
Głowacki, I.
Kryszewski, M.
Staerk, D.
Helberg, H.
Powiązania:: https://bibliotekanauki.pl/articles/1933406.pdf
Data publikacji:: 1995-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 73.61.Ph
81.20.Ti
Opis:: Electrical properties of conducting reticulate doped polymeric films containing BEDT-TTF iodide crystalline network were investigated. Conditions of preparation of this kind of films i.e. time of doping by iodine vapours and time and temperature of annealing and their influence on transformation of the BEDT-TTF iodide crystallites into superconducting phase are discussed.
Źródło:: Acta Physica Polonica A; 1995, 87, 4-5; 899-903
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Informacja