Autor: Gołąb, A. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Magnetic Properties of $TbNi_{1-x}Au_{x}In$ Compounds
Autorzy:: Bałanda, M.
Penc, B.
Baran, S.
Jaworska-Gołąb, T.
Arulraj, A.
Szytuła, A.
Powiązania:: https://bibliotekanauki.pl/articles/1810419.pdf
Data publikacji:: 2009-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.20.Lp
75.25.+z
75.50.Ee
Opis:: Polycrystalline samples of $TbNi_{1-x}Au_{x}In$ for x = 0.1, 0.2, 0.4, 0.6 and 0.8 were prepared and studied by powder X-ray and neutron diffraction and ac magnetic susceptibility measurements. These compounds crystallize in the hexagonal ZrNiAl-type structure. With increasing Au content a change in the magnetic structure is observed. For x = 0.1, 0.2 and 0.4 the magnetic order is described by the propagation vector k = (1/2, 0, 1/2) while for x = 0.8 by k = (0, 0, 1/2). Between 1.5 K and the Néel temperature the magnetic order is stable.
Źródło:: Acta Physica Polonica A; 2009, 115, 1; 174-177
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Magnetic Structure of RCuIn (R = Nd, Tb, Ho, Er)
Autorzy:: Szytuła, A.
Baran, S.
Jaworska-Gołąb, T.
Penc, B.
Zarzycki, A.
Stűsser, N.
Arulraj, A.
Tyvanchuk, Yu.
Powiązania:: https://bibliotekanauki.pl/articles/1813175.pdf
Data publikacji:: 2008-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.12.-q
71.20.Lp
75.25.+z
75.50.Ee
Opis:: Magnetic and neutron diffraction measurements of RCuIn (R = Nd, Tb, Ho, Er) are reported. The compounds crystallize in the hexagonal ZrNiAl-type structure. The ZrNiAl lattice originates from a distortion of a kagomélattice. The studied compounds are antiferromagnets with the Néel temperature equal to 4.9 K for R = Nd, 14.5 K for R = Tb, 4.5 K for R = Ho and 3.5 K for R = Er. The magnetic ordering is described by the propagation vectorwe k = (1/2, 1/2, $k_z$) with $k_z$ equal to 0.161(6) for R = Nd, 0.2213(5) for R = Tb, 0.2510(3) for R = Ho and 0 for R = Er. The magnetic structure is noncollinear with magnetic moments in the basal plane for R = Nd, Tb and Ho and collinear with magnetic moments parallel to the c-axis for R = Er. The observed magnetic ordering results from the competition between exchange interactions of the Ruderman-Kittel-Kasuya-Yosida type, the geometrical frustration of the rare-earth magnetic moments and the influence of the crystal electric field. The latter affects the direction of magnetic moments and is responsible for the magnetic crystalline anisotropy.
Źródło:: Acta Physica Polonica A; 2008, 113, 4; 1185-1192
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Optical Study of SrLaGaO$\text{}_{4}$ and SrLaGa$\text{}_{3}$O$\text{}_{7}$ Doped with Nd$\text{}^{3+}$ and Yb$\text{}^{3+}$
Autorzy:: Ryba-Romanowski, W.
Gołąb, S.
Pisarski, W.
Dominiak-Dzik, G.
Gloubokov, A.
Powiązania:: https://bibliotekanauki.pl/articles/1945654.pdf
Data publikacji:: 1996-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.55.Hx
42.70.Hj
Opis:: Single crystals of SrLaGaO$\text{}_{4}$ and SrLaGa$\text{}_{3}$O$\text{}_{7}$ singly doped with Nd and codoped with Nd and Yb have been grown by the Czochralski method. Both the compounds form tetragonal crystals but belong to different space groups. A common feature of these matrices is a structural disorder resulting from statistical distribution of Sr$\text{}^{2+}$ and La$\text{}^{3+}$ ions over the lattice sites. A previous investigation of a laser diode pumped SrLaGa$\text{}_{3}$O$\text{}_{7}$:Nd laser revealed that inhomogeneous broadening of spectral lines of Nd$\text{}^{3+}$ was advantageous for optical pumping and did not influence adversely the extraction efficiency. The present paper deals mainly with optical properties of Yb$\text{}^{3+}$ ions which are of interest for the design of lasers pumped by a diode laser and operating near 1 μm.
Źródło:: Acta Physica Polonica A; 1996, 90, 2; 399-405
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Structural Chemistry and Magnetic Properties of $R_2Ni_{2-x}In$ (R=Gd-Er, x=0.22 or 0.3) Compounds
Autorzy:: Tyvanchuk, Yu.
Baran, S.
Jaworska-Gołąb, T.
Duraj, R.
Kalychak, Ya.
Szytuła, A.
Powiązania:: https://bibliotekanauki.pl/articles/1489895.pdf
Data publikacji:: 2012-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.30.Cr
75.30.Kz
61.10.-i
61.66.Dk
75.40.Gb
75.50.Ee
Opis:: X-ray diffraction and magnetic measurements of $R_2Ni_{2 - x}In$ (R = Ho, Dy, x = 0.3 and R = Gd, Tb, Er, x = 0.22) compounds are reported. The compounds crystallize in the tetragonal $Mo_2FeB_2$-type crystal structure (space group P4/mbm). Magnetic measurements reveal antiferromagnetic order with the Néel temperatures $T_{N}$ equal to 26.4 K (Gd), 20.2 K (Tb), 8.3 K (Dy), 7.1 K (Ho), and 6.3 K (Er). For R = Gd, Tb and Er an additional phase transition below $T_{N}$ is observed at 13.5, 13.1, and 5.0 K, respectively.
Źródło:: Acta Physica Polonica A; 2012, 121, 3; 678-681
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Investigation of As Grown and Induced Structural Defects in SrLaXO$\text{}_{4}$ (x = Al, Ga) Crystals
Autorzy:: Ryba-Romanowski, W.
Gołąb, S.
Dereń, P.
Dominiak-Dzik, G.
Pisarski, W.
Gloubokov, A.
Powiązania:: https://bibliotekanauki.pl/articles/1964366.pdf
Data publikacji:: 1997-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.55.Hx
42.70.Hj
Opis:: SrLaGaO$\text{}_{4}$ and SrLaAlO$\text{}_{4}$ substrates grown by the Czochralski method have no twins or subgrains however they show strong tendency to form point defects. The nature of these defects is not well understood yet. They may be associated with deviations from stoichiometry andor oxygen atoms located in the interstitial positions. Virtually all title crystals grown by the Czochralski method display various colours from light green to deeply red owing to light absorption by point defects. Absorption centres appear to be very stable in time and resistant to usual thermal treatment. UV excitation increases the density of defects and gives rise to strong photoluminescence, otherwise too weak to be observed.
Źródło:: Acta Physica Polonica A; 1997, 92, 1; 191-196
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Magnetic Properties of $Dy_{11}Si_4In_6$
Autorzy:: Duraj, D.
Baran, S.
Jaworska-Gołąb, T.
Kalychak, Ya.
Przewoźnik, J.
Szytuła, A.
Tyvanchuk, Yu.
Powiązania:: https://bibliotekanauki.pl/articles/1427191.pdf
Data publikacji:: 2012-05
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.30.Kz
75.40.-s
75.40.Gb
65.40.gd
Opis:: Magnetic and specific heat measurements of $Dy_{11}Si_4In_6$ are reported. This compound crystallizes in the tetragonal $Sm_{11}Ge_4In_6$-type crystal structure (space group I4/mmm), in which Dy atoms occupy four different sites. The AC and DC magnetic measurements suggest complex magnetic properties. Below $T_{c}$ = 52 K magnetic ordering has a ferromagnetic component, while below 20 K a change of the properties is observed. Near the Curie temperature the magnetocaloric effect with the magnetic entropy change $\Delta S_{m}$ equal to 16.5 J/(kg K) is observed. The specific heat data indicate only the phase transition at 52 K.
Źródło:: Acta Physica Polonica A; 2012, 121, 5-6; 1118-1120
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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