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Connection of Thermopower, Magneto Thermopower with Resistivity and Magnetoresistivity in Nd(1-x)SrxMnO3 and Sm(1-x)SrxMnO3 Manganites

Received: 27 August 2017     Accepted: 15 September 2017     Published: 13 October 2017
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Abstract

An experimental study of thermopower, magneto thermopower, magnetoresistivity and magnetization of Nd(1-x)SrxMnO3 and Sm(1-x)SrxMnO3 with 0 ≤ х ≤ 0.3 was conducted. A steep rise of thermopower as well as giant values of magneto thermopower and magnetoresistivity were observed near Curie temperature ТС in compounds with 0.15 ≤ х ≤ 0.3. On the other hand, no special features were found in case of х = 0. It has been known that compounds with 0.1 ≤ х ≤ 0.3 consist of ferromagnetic clusters of ferron (magnetic polaron) type located in A-type antiferromagnetic matrix. An increase of thermopower near ТС is caused by ferrons as with the application of magnetic field or temperatures higher than ТС 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.

Published in American Journal of Physics and Applications (Volume 5, Issue 6)
DOI 10.11648/j.ajpa.20170506.12
Page(s) 84-90
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2017. Published by Science Publishing Group

Keywords

Manganites, Thermopower, Magneto Thermopower, Magnetoresistance, Magnetic Polaron, Magnetization

References
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    Liudmila Koroleva, Ivan Batashev, Artem Morozov, Anatol Balbashov, Henryk Szymczak, et al. (2017). Connection of Thermopower, Magneto Thermopower with Resistivity and Magnetoresistivity in Nd(1-x)SrxMnO3 and Sm(1-x)SrxMnO3 Manganites. American Journal of Physics and Applications, 5(6), 84-90. https://doi.org/10.11648/j.ajpa.20170506.12

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    ACS Style

    Liudmila Koroleva; Ivan Batashev; Artem Morozov; Anatol Balbashov; Henryk Szymczak, et al. Connection of Thermopower, Magneto Thermopower with Resistivity and Magnetoresistivity in Nd(1-x)SrxMnO3 and Sm(1-x)SrxMnO3 Manganites. Am. J. Phys. Appl. 2017, 5(6), 84-90. doi: 10.11648/j.ajpa.20170506.12

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    AMA Style

    Liudmila Koroleva, Ivan Batashev, Artem Morozov, Anatol Balbashov, Henryk Szymczak, et al. Connection of Thermopower, Magneto Thermopower with Resistivity and Magnetoresistivity in Nd(1-x)SrxMnO3 and Sm(1-x)SrxMnO3 Manganites. Am J Phys Appl. 2017;5(6):84-90. doi: 10.11648/j.ajpa.20170506.12

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  • @article{10.11648/j.ajpa.20170506.12,
      author = {Liudmila Koroleva and Ivan Batashev and Artem Morozov and Anatol Balbashov and Henryk Szymczak and Anna Slawska-Waniewska and Sabina Lewinska},
      title = {Connection of Thermopower, Magneto Thermopower with Resistivity and Magnetoresistivity in Nd(1-x)SrxMnO3 and Sm(1-x)SrxMnO3 Manganites},
      journal = {American Journal of Physics and Applications},
      volume = {5},
      number = {6},
      pages = {84-90},
      doi = {10.11648/j.ajpa.20170506.12},
      url = {https://doi.org/10.11648/j.ajpa.20170506.12},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajpa.20170506.12},
      abstract = {An experimental study of thermopower, magneto thermopower, magnetoresistivity and magnetization of Nd(1-x)SrxMnO3 and Sm(1-x)SrxMnO3 with 0 ≤ х ≤ 0.3 was conducted. A steep rise of thermopower as well as giant values of magneto thermopower and magnetoresistivity were observed near Curie temperature ТС in compounds with 0.15 ≤ х ≤ 0.3. On the other hand, no special features were found in case of х = 0. It has been known that compounds with 0.1 ≤ х ≤ 0.3 consist of ferromagnetic clusters of ferron (magnetic polaron) type located in A-type antiferromagnetic matrix. An increase of thermopower near ТС is caused by ferrons as with the application of magnetic field or temperatures higher than ТС 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.},
     year = {2017}
    }
    

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    T1  - Connection of Thermopower, Magneto Thermopower with Resistivity and Magnetoresistivity in Nd(1-x)SrxMnO3 and Sm(1-x)SrxMnO3 Manganites
    AU  - Liudmila Koroleva
    AU  - Ivan Batashev
    AU  - Artem Morozov
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    AU  - Henryk Szymczak
    AU  - Anna Slawska-Waniewska
    AU  - Sabina Lewinska
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    T2  - American Journal of Physics and Applications
    JF  - American Journal of Physics and Applications
    JO  - American Journal of Physics and Applications
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    PB  - Science Publishing Group
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    AB  - An experimental study of thermopower, magneto thermopower, magnetoresistivity and magnetization of Nd(1-x)SrxMnO3 and Sm(1-x)SrxMnO3 with 0 ≤ х ≤ 0.3 was conducted. A steep rise of thermopower as well as giant values of magneto thermopower and magnetoresistivity were observed near Curie temperature ТС in compounds with 0.15 ≤ х ≤ 0.3. On the other hand, no special features were found in case of х = 0. It has been known that compounds with 0.1 ≤ х ≤ 0.3 consist of ferromagnetic clusters of ferron (magnetic polaron) type located in A-type antiferromagnetic matrix. An increase of thermopower near ТС is caused by ferrons as with the application of magnetic field or temperatures higher than ТС 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.
    VL  - 5
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Author Information
  • Physics Faculty, Lomonosov Moscow State University, Moscow, Russia

  • Physics Faculty, Lomonosov Moscow State University, Moscow, Russia

  • Physics Faculty, Lomonosov Moscow State University, Moscow, Russia

  • Scientific Research Center “Management Problem Energy Resource” of Moscow Power Engineering Institute, Moscow, Russia

  • Institute of Physics Polish, Academy of Sciences, Warsaw, Poland

  • Institute of Physics Polish, Academy of Sciences, Warsaw, Poland

  • Institute of Physics Polish, Academy of Sciences, Warsaw, Poland

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