Low-temperature anomalies in the magnetic and thermal properties of molecular cryocrystals doped with oxygen impurity
The magnetic properties of oxygen pair clusters are investigated theoretically for different cluster geometries which can be realized by doping molecular cryomatrices with oxygen. Anomalous temperature and pressure behavior of the magnetic susceptibility, heat capacity, and entropy is predicted. It...
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| Veröffentlicht in: | Физика низких температур |
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| Datum: | 2000 |
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| Sprache: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2000
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | Low-temperature anomalies in the magnetic and thermal properties of molecular cryocrystals doped with oxygen impurity / Yu.A. Freiman, S.M. Tretyak, A. Jeżowski // Физика низких температур. — 2000. — Т. 26, № 9-10. — С. 1029-1043. — Бібліогр.: 21 назв. — англ. |
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Freiman, Yu.A. Tretyak, S.M. Jeżowski, A. 2018-01-17T20:05:30Z 2018-01-17T20:05:30Z 2000 Low-temperature anomalies in the magnetic and thermal properties of molecular cryocrystals doped with oxygen impurity / Yu.A. Freiman, S.M. Tretyak, A. Jeżowski // Физика низких температур. — 2000. — Т. 26, № 9-10. — С. 1029-1043. — Бібліогр.: 21 назв. — англ. 0132-6414 PACS: 36.40.Cg, 65.40.+g, 65.40.+m, 75.40.Cx https://nasplib.isofts.kiev.ua/handle/123456789/129226 The magnetic properties of oxygen pair clusters are investigated theoretically for different cluster geometries which can be realized by doping molecular cryomatrices with oxygen. Anomalous temperature and pressure behavior of the magnetic susceptibility, heat capacity, and entropy is predicted. It is proposed to use these anomalies for studying the parameters characterizing the oxygen clusters and the parameters of the host matrix: the effective spin-figure interaction constant D for the molecule in the matrix, the exchange parameter J, and the number of pair clusters Np, which can deviate markedly from the purely random value Np=6Nc² (N is Avogadro’s number, and c is the molar concentration of the impurity). The data on the magnetic susceptibility may be used to analyze the character of the positional and orientational short-range order in the solid solution. The value of D contains information about the orientational order parameter; the distance and angular dependence of the exchange interaction parameter are still subject to discussion in the literature. The temperature dependence of Np contains information about diffusion and clusterization processes in the system. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Low-Temperature Physics and Chemistry in Cryomatrice Low-temperature anomalies in the magnetic and thermal properties of molecular cryocrystals doped with oxygen impurity Article published earlier |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| title |
Low-temperature anomalies in the magnetic and thermal properties of molecular cryocrystals doped with oxygen impurity |
| spellingShingle |
Low-temperature anomalies in the magnetic and thermal properties of molecular cryocrystals doped with oxygen impurity Freiman, Yu.A. Tretyak, S.M. Jeżowski, A. Low-Temperature Physics and Chemistry in Cryomatrice |
| title_short |
Low-temperature anomalies in the magnetic and thermal properties of molecular cryocrystals doped with oxygen impurity |
| title_full |
Low-temperature anomalies in the magnetic and thermal properties of molecular cryocrystals doped with oxygen impurity |
| title_fullStr |
Low-temperature anomalies in the magnetic and thermal properties of molecular cryocrystals doped with oxygen impurity |
| title_full_unstemmed |
Low-temperature anomalies in the magnetic and thermal properties of molecular cryocrystals doped with oxygen impurity |
| title_sort |
low-temperature anomalies in the magnetic and thermal properties of molecular cryocrystals doped with oxygen impurity |
| author |
Freiman, Yu.A. Tretyak, S.M. Jeżowski, A. |
| author_facet |
Freiman, Yu.A. Tretyak, S.M. Jeżowski, A. |
| topic |
Low-Temperature Physics and Chemistry in Cryomatrice |
| topic_facet |
Low-Temperature Physics and Chemistry in Cryomatrice |
| publishDate |
2000 |
| language |
English |
| container_title |
Физика низких температур |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| format |
Article |
| description |
The magnetic properties of oxygen pair clusters are investigated theoretically for different cluster geometries which can be realized by doping molecular cryomatrices with oxygen. Anomalous temperature and pressure behavior of the magnetic susceptibility, heat capacity, and entropy is predicted. It is proposed to use these anomalies for studying the parameters characterizing the oxygen clusters and the parameters of the host matrix: the effective spin-figure interaction constant D for the molecule in the matrix, the exchange parameter J, and the number of pair clusters Np, which can deviate markedly from the purely random value Np=6Nc² (N is Avogadro’s number, and c is the molar concentration of the impurity). The data on the magnetic susceptibility may be used to analyze the character of the positional and orientational short-range order in the solid solution. The value of D contains information about the orientational order parameter; the distance and angular dependence of the exchange interaction parameter are still subject to discussion in the literature. The temperature dependence of Np contains information about diffusion and clusterization processes in the system.
|
| issn |
0132-6414 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/129226 |
| citation_txt |
Low-temperature anomalies in the magnetic and thermal properties of molecular cryocrystals doped with oxygen impurity / Yu.A. Freiman, S.M. Tretyak, A. Jeżowski // Физика низких температур. — 2000. — Т. 26, № 9-10. — С. 1029-1043. — Бібліогр.: 21 назв. — англ. |
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| first_indexed |
2025-11-30T11:35:36Z |
| last_indexed |
2025-11-30T11:35:36Z |
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