Autor: Pelka, R. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Field-Induced Slow Magnetic Relaxation in Mn₉W₆ Cluster-Based Compound
Autorzy:: Konieczny, P.
Pełka, R.
Chorazy, S.
Podgajny, R.
Sieklucka, B.
Wasiutyński, T.
Powiązania:: https://bibliotekanauki.pl/articles/1032251.pdf
Data publikacji:: 2017-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.50.Xx
75.40.Cx
75.50.Gg
Opis:: Magnetic measurements of a three-dimensional (3D) molecular magnet built of Mn₉[W(CN)₈]₆ clusters have been carried out to study its static and dynamic properties. Measurements of ac susceptibility in the presence of static magnetic field revealed slow magnetic relaxations. It was found that for the 120 Hz wave frequency the optimal static field which maximizes the imaginary component of the ac susceptibility is about 500 Oe.
Źródło:: Acta Physica Polonica A; 2017, 131, 4; 884-886
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Magnetic Properties of Transition Metal Molybdates
Autorzy:: Konieczny, P.
Pełka, R.
Grzesiak-Nowak, M.
Szymańska, A.
Łasocha, W.
Wasiutyński, T.
Powiązania:: https://bibliotekanauki.pl/articles/1368631.pdf
Data publikacji:: 2014-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.50.Xx
75.50.Ee
75.50.-y
Opis:: Two examples of transition metal molybdates were studied with the use of X-ray diffraction and DC magnetometry techniques. First compound, copper dimolybdate trihydrate $CuMo_{2}O_{7}$·$3H_{2}O$ contains 2D layers. The second one is fibrillar cobalt trimolybdate octahydrate $CoMo_{3}O_{10}$·$8H_{2}O$. Both compounds exhibit paramagnetic behaviour at room temperature. However, in the first one copper ions form dimers linked by oxygen bridges, in which exchange interactions between two localized spin states occur. The second compound consists of isolated cobalt ions in the octahedral surroundings, resulting in magnetic properties deviating from the Curie law.
Źródło:: Acta Physica Polonica A; 2014, 126, 1; 250-251
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Photo-Induced Relaxation of Magnetization in Molecular Magnet
Autorzy:: Zieliński, P.
Tracz, P.
Podgajny, R.
Pełka, R.
Bałanda, M.
Wasiutyński, T.
Sieklucka, B.
Powiązania:: https://bibliotekanauki.pl/articles/1814014.pdf
Data publikacji:: 2007-12
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.50.Xx
75.60.-d
78.20.Ls
Opis:: The experimental study of photo-induced magnetization of hybrid molecular magnet containing cobalt(II) and tungsten(V) magnetic centers bridged by 4,4'-bpy and $CN^-$ is presented. The observed increase in magnetization rate is attributed to the defects due to inter-valence transfer between $Co^{II}W^V$↔ $Co^{III}W^{IV}$. The time evolution of magnetization is parameterized by the power law rather than exponential function.
Źródło:: Acta Physica Polonica A; 2007, 112, S; S-183-S-188
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Magnetic Systems at Criticality: Different Signatures of Scaling
Autorzy:: Pełka, R.
Konieczny, P.
Fitta, M.
Czapla, M.
Zieliński, P.
Bałanda, M.
Wasiutyński, T.
Miyazaki, Y.
Inaba, A.
Pinkowicz, D.
Sieklucka, B.
Powiązania:: https://bibliotekanauki.pl/articles/1399023.pdf
Data publikacji:: 2013-12
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.40.-s
75.30.Kz
75.30.Sg
75.50.Xx
Opis:: Different aspects of critical behaviour of magnetic materials are presented and discussed. The scaling ideas are shown to arise in the context of purely magnetic properties as well as in that of thermal properties as demonstrated by magnetocaloric effect or combined scaling of excess entropy and order parameter. Two non-standard approaches to scaling phenomena are described. The presented concepts are exemplified by experimental data gathered on four representatives of molecular magnets.
Źródło:: Acta Physica Polonica A; 2013, 124, 6; 977-989
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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