- Tytuł:
- Phase Separation and Microwave Response of Epitaxial and Polycrystalline Manganite Films
- Autorzy:
-
Ašmontas, S.
Abrutis, A.
Gradauskas, J.
Lučun, A.
Oginskis, A.
Plaušinaitienė, V.
Sužiedėlis, A.
Vengalis, B. - Powiązania:
- https://bibliotekanauki.pl/articles/2037115.pdf
- Data publikacji:
- 2004
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
75.47.Gk
75.47.Lx
07.57.Kp - Opis:
- The resistance, magnetoresistance, and resistance response under microwave irradiation (f=10 and 35 GHz) were measured for epitaxial and polycrystalline La$\text{}_{0.67}$Ca$\text{}_{0.33}$MnO$\text{}_{3}$ and La$\text{}_{0.67}$Sr$\text{}_{0.33}$MnO$\text{}_{3}$ thin films in the temperature range 78÷300 K. The microwave induced resistance increase observed for the epitaxial films in a narrow temperature range below the ferromagnetic to paramagnetic transition temperature T$\text{}_{c}$ certifies coexistence of low resistance (ferromagnetic) and high resistance (paramagnetic) regions in the manganites. Resistance of polycrystalline films decreased under microwave irradiation in a wide temperature range below T$\text{}_{c}$. The effect was explained in terms of microwave assisted hopping of carriers in high resistance regions formed at grain boundaries of the polycrystalline films.
- Źródło:
-
Acta Physica Polonica A; 2004, 105, 1-2; 141-147
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł