Autor: Nakamura, T. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Micro-Raman Study of $BiFeO_3$ Thin Films Fabricated by Chemical Solution Deposition Using Different Bi/Fe Ratio Precursors
Autorzy:: Nakamura, T.
Fukumura, H.
Hasuike, N.
Harima, H.
Nakamura, Y.
Kisoda, K.
Nakashima, S.
Okuyama, M.
Powiązania:: https://bibliotekanauki.pl/articles/1807821.pdf
Data publikacji:: 2009-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.30.Hv
63.20.D-
78.30.-j
Opis:: $BiFeO_3$ thin films were grown by chemical solution deposition using precursors with different elemental ratios, Bi/Fe = 1.1/1.0, 1.0/1.0 and 1.0/1.1. All the samples consisted of two easily distinguishable components of crystalline and amorphous phases. We have found that the electric properties of $BiFeO_3$ thin films are closely connected to the crystallinity of the films.
Źródło:: Acta Physica Polonica A; 2009, 116, 1; 72-74
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Synthesis and Characterization of Mn-Doped $BiFeO_3$ Nanoparticles
Autorzy:: Fukumura, H.
Matsui, S.
Tonari, N.
Nakamura, T.
Hasuike, N.
Nishio, K.
Isshiki, T.
Harima, H.
Kisoda, K
Powiązania:: https://bibliotekanauki.pl/articles/1807808.pdf
Data publikacji:: 2009-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.30.Hv
63.20.D-
78.30.-j
Opis:: $BiFeO_3$ is a multiferroic material showing antiferromagnetic ordering and ferroelectric behavior simultaneously. Here, Mn-doped $BiFeO_3$ nanoparticles were synthesized up to 10% of Mn composition by a sol-gel process. The samples showed high crystallinity with no secondary phase up to 2% of Mn doping. A phonon peak at 1250 $cm^{-1}$ in undoped $BiFeO_3$ showed anomalous intensity enhancement in the magnetically ordered phase below $T_N$ = 643 K due to a spin-phonon coupling. This behavior was less pronounced in the Mn-doped samples, suggesting a suppression of magnetic ordering between $Fe^{3+}$ spins by Mn doping.
Źródło:: Acta Physica Polonica A; 2009, 116, 1; 47-50
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Pressure Effect on Yb-Based Strongly Correlated Electron Systems
Autorzy:: Mito, T.
Otani, M.
Nakamura, M.
Koyama, T.
Wada, S.
Kotegawa, H.
Kobayashi, T.
Idzikowski, B.
Reiffers, M.
Sarrao, J.
Powiązania:: https://bibliotekanauki.pl/articles/1810284.pdf
Data publikacji:: 2009-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.27.+a
75.30.Kz
75.30.Mb
76.60.-k
Opis:: We studied pressure effects on $YbCu_5$ and $YbInCu_4$, good examples of the Yb-based compounds to investigate the nonmagnetic-magnetic transition in Yb-based strongly correlated electron systems. With increasing pressure, the low-temperature Fermi liquid state of $YbCu_5$ is gradually suppressed, suggesting the second-order like nonmagnetic-magnetic transition around the pressure of 5-6 GPa. On the other hand, in $YbInCu_4$ which has a pressure-induced magnetic ordered ground state above $P_C$=2.45 GPa, both high-temperature paramagnetic and low-temperature intermediate valence phases are insensitive to pressure. Our results confirm the first-order nature of the transition between the intermediate valence and magnetic ordered phases with pressure.
Źródło:: Acta Physica Polonica A; 2009, 115, 1; 47-52
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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