Nanoparticles effect on magnetic and transport properties of (La0.7Sr0.3)0.9Mn1.1O3 manganites

Автор(и)

  • V. Dyakonov Institute of Physics PAS, 32/46 Al. Lotników, 02-668 Warsaw, Poland
  • W. Bazela Institute of Physics, Technical University, Podchorazych 1, 30-084 Kraków, Poland
  • A. Szytula M. Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland
  • O. Iesenchuk Institute of Physics PAS, 32/46 Al. Lotników, 02-668 Warsaw, Poland
  • Z. Kravchenko A.A. Galkin Donetsk Physico-Technical Institute NÀNU, 72 R. Luxembourg Str., Donetsk 83114, Ukraine
  • K. Piotrowski Institute of Physics PAS, 32/46 Al. Lotników, 02-668 Warsaw, Poland
  • V. Mikhaylov A.A. Galkin Donetsk Physico-Technical Institute NÀNU, 72 R. Luxembourg Str., Donetsk 83114, Ukraine
  • S. Prilipko A.A. Galkin Donetsk Physico-Technical Institute NÀNU, 72 R. Luxembourg Str., Donetsk 83114, Ukraine
  • V. Varyukhin A.A. Galkin Donetsk Physico-Technical Institute NÀNU, 72 R. Luxembourg Str., Donetsk 83114, Ukraine
  • A. Shemjakov A.A. Galkin Donetsk Physico-Technical Institute NÀNU, 72 R. Luxembourg Str., Donetsk 83114, Ukraine
  • A. Pashchenko A.A. Galkin Donetsk Physico-Technical Institute NÀNU, 72 R. Luxembourg Str., Donetsk 83114, Ukraine
  • V. Pashchenko A.A. Galkin Donetsk Physico-Technical Institute NÀNU, 72 R. Luxembourg Str., Donetsk 83114, Ukraine
  • S. Myronova A.A. Galkin Donetsk Physico-Technical Institute NÀNU, 72 R. Luxembourg Str., Donetsk 83114, Ukraine
  • E. Zubov A.A. Galkin Donetsk Physico-Technical Institute NÀNU, 72 R. Luxembourg Str., Donetsk 83114, Ukraine
  • J. Kazmierczak Institute of Physics PAS, 32/46 Al. Lotników, 02-668 Warsaw, Poland
  • A. Slawska-Waniewska Institute of Physics PAS, 32/46 Al. Lotników, 02-668 Warsaw, Poland
  • H. Szymczak Institute of Physics PAS, 32/46 Al. Lotników, 02-668 Warsaw, Poland

DOI:

https://doi.org/10.1063/1.3170933

Ключові слова:

nanostructures, manganite, magnetic measurement, resistance.

Анотація

We report on the magnetic and transport thermal measurements of nanosize (La0.7Sr0.3)0.9Mn1.1O3 manganite. The nanoparticles were synthesized with use of co-precipitation method at different (800, 900 and 950 °C) temperatures. Their crystal structure was determined to be perovskite-like with a rhombohedral distortion (the space group Rc). The phase composition and specific surface nanopowders were determined. The average size of synthesized nanoparticles (from 40 to 100 nm) was estimated by both the method of low-temperature adsorption of argon and x-ray diffraction measurements. All the nanosize samples show ferromagnetic-like ordering with close phase transition temperatures. Their magnetization decreases with reducing the particle size. Comparison of experimental and calculated temperature dependences of the spontaneous magnetic moment shows that the spontaneous magnetization both in magnetic field and without field is well described in the frame of the double exchange model. The decrease of magnetization with decreasing particle size is due to increasing the surface contribution to magnetization. The magnetic entropy was shown to increase with increasing applied magnetic field and to be smaller for the small particles. The resistivity was established to become higher with reducing the particles size at any temperatures.

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Опубліковано

2009-05-28

Як цитувати

(1)
Dyakonov, V.; Bazela, W.; Szytula, A.; Iesenchuk, O.; Kravchenko, Z.; Piotrowski, K.; Mikhaylov, V.; Prilipko, S.; Varyukhin, V.; Shemjakov, A.; Pashchenko, A.; Pashchenko, V.; Myronova, S.; Zubov, E.; Kazmierczak, J.; Slawska-Waniewska, A.; Szymczak, H. Nanoparticles Effect on Magnetic and Transport Properties of (La0.7Sr0.3)0.9Mn1.1O3 Manganites. Fiz. Nizk. Temp. 2009, 35, 725-734.

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Наноструктури при низьких температурах

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