Wszystkie pola: Gao, N. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Electric-Elastic Field Induced by a Straight Dislocation in One-Dimensional Quasicrystals
Autorzy:: Yang, L.
Gao, Y.
Pan, E.
Waksmanski, N.
Powiązania:: https://bibliotekanauki.pl/articles/1202982.pdf
Data publikacji:: 2014-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.44.Br
61.72.Lk
62.20.D-
Opis:: By using the generalized Stroh formalism, the electric-elastic field induced by a straight dislocation parallel to a periodic axis of a one-dimensional quasicrystal is obtained. The derivation is concise and the solution is in an exact closed form. As an illustration, the electric-elastic fields around a straight dislocation in a one-dimensional hexagonal quasicrystal are studied. Besides the interesting numerical results presented, the generalized Stroh formalism can be applied to more complicated dislocation problems in quasicrystals.
Źródło:: Acta Physica Polonica A; 2014, 126, 2; 467-470
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Hydrothermal Synthesis and Microstructural, Optical Properties Characterization of $YVO_4$ Phosphor Powder
Autorzy:: Zhang, S.
Liang, Y.
Gao, X.
Liu, H.
Powiązania:: https://bibliotekanauki.pl/articles/1207386.pdf
Data publikacji:: 2014-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.55.-m
42.70.Hj
78.67.-n
Opis:: The phonon energy of $YVO_4$ crystal is lower than other usual compounds of salt. So it is suitable as host material for down-conversion materials. Hydrothermal method was adopted to synthesize $YVO_4$ phosphor powder with the use of yttrium oxide and sodium vanadate as raw material. The change in the relative integral intensity of the (200) and (112) diffraction peaks indicates that macroscopic stress in the lattice obviously changes with the elevated hydrothermal reaction temperature. The $YVO_4$ phosphor powder synthesized involves a certain agglomeration of small particles. The phonon vibration in the $YVO_4$ originates mainly from the internal vibrations in the vanadium-oxygen tetrahedron, in addition to the Y-O and O-H vibrations. Due to a low phonon energy of only $2.8188 × 10^{-21} J$, $YVO_4$ helps to improve the down-conversion efficiency of rare-earth ions. A bandgap value of approximately 3.8 eV for the synthesized $YVO_4$ powders leads to good absorption properties in the ultraviolet region. Upon excitation by the 320 nm ultraviolet photon, the intrinsic emission of $YVO_4$ powders is annihilated, and a broadband emission of $VO_4^{3-}$ near 450 nm is observed at room temperature. The $YVO_4$ phosphor powder synthesized at 180C exhibits the maximum photoluminescence intensity because of its excellent crystallization.
Źródło:: Acta Physica Polonica A; 2014, 125, 1; 105-110
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Spin Glass State in S=3/2 Kagomé Antiferromagnet $Co(N_{3})_{2}(bpg)[(CH_{3})_{2}(NCOH)]_{4/3}$
Autorzy:: Vrábel, P.
Čižmár, E.
Orendáčová, A.
Gao, S.
Orendáč, M.
Powiązania:: https://bibliotekanauki.pl/articles/1368680.pdf
Data publikacji:: 2014-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.50.Ee
75.30.Et
75.10.Nr
Opis:: Specific heat, magnetic susceptibility and magnetization of $Co(N_{3})_{2}(bpg)[(CH_{3})_{2}(NCOH)]_{4/3}$, representing S=3/2 kagomé system are reported. Long-range ordering at 16 K was revealed, however, at lower temperatures slow spin dynamics is still found. The analysis of alternating susceptibility suggests the onset of glassy state. The study of the time dependence of magnetization revealed the existence of more relaxation channels with pronounced different relaxation times. The observed behaviour is consistent with the formation of topological spin glass in which relaxation is governed by both spin and chiral degrees of freedom.
Źródło:: Acta Physica Polonica A; 2014, 126, 1; 266-267
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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