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Connection of Thermopower, Magneto Thermopower with Resistivity and Magnetoresistivity in Nd(1-x)SrxMnO3 and Sm(1-x)SrxMnO3 Manganites. Liudmila Koroleva,Ivan Batashev, Artem Morozov, Anatol Balbashovстатья
- Авторы: Liudmila Koroleva, Ivan Batashev, Artem Morozov, Anatol Balbashov, Henryk Szymczak, Anna Slawska-Waniewska, Sabina Lewinska
- Журнал: American Journal of Physics and Applications
- Том: 5
- Номер: 6
- Год издания: 2017
- Издательство: Science Publishing Group
- Местоположение издательства: New York, USA
- Первая страница: 84
- Последняя страница: 90
- DOI: 10.11648/j.ajpa.20170506.12
- Аннотация: An experimental study of thermopower, magneto thermopower, magnetoresistivity and magnetization of Nd(1-x)SrxMnO3 and Sm(1-x)SrxMnO3 with 0<=x<=0.3 was conducted. A steep rise of thermopower as well as giant values of magneto thermopower and magnetoresistivity were observed near Curie temperature Tc in conpounds with 0.15<=x<=0.3. On the other hand no special features were found in case of x=0. It has been known that compounds with 0.1<=x<=0.3 consist of ferromagnetic clusers of ferron(magnetic polaron) type located in A-type antiferromagnetic matrix. An increase of thermopower near Tc is caused by ferrons as with the application of magnetic field or temperature higher than Tc thermopower falls sharply due to the destruction of ferrons. So, the value of thermopower is directly connected to the number of magnetic polarons in sample. Therefore thermopower in doped magnetic semiconductors is determined by level of doping and volume of the sample.
- Добавил в систему: Королёва Людмила Ивановна