Advertisement

Science in China Series A: Mathematics

, Volume 42, Issue 7, pp 750–757 | Cite as

Influence of Fe3+ on perovskite oxides: La2/3Ca1/3Mn1-x Fe x O3

  • Wang Xiaodong 
  • Xu Zuxiong 
  • Ma Ruzhang 
Article

Abstract

The structure and magnetoresistance properties in sintered samples of La2/3Ca1/3Mn1-x Fe x O3(0≤x≤0.84) are studied by using Mössbauer spectroscopy, XRD and magnetic measurement. There are antiferromagnetic interactions between Fe and its nearest neighbors (Fe, Mn) when 0 <x ≤0.67, which are important factors influencing the double-exchange between Mn3+ and Mn4+, Curie temperature, magnetic moment and GMR. It is suggested that the Mn3+ (Fe3+) /Mn4+ system also consists of magnetic clusters with different sizes.

Keywords

giant magnetoresistance Mössbauer spectroscopy antiferromagnetic interaction magnetic cluster 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Helmolt, R. Von, Wecker, J., Holzapfel, B. et al., Magnetoresistance in perovskitelike La2/3 Ba1/3 MnQ3 ferromagnetic films,Phys, Rev. Lett., 1993, 71: 2331.CrossRefGoogle Scholar
  2. 2.
    Jin, S., Tiefel, T. H., McCormack, M. et al., Thousandfold change in resistivity in magnetoresistive La-Ca-Mn-O films,Science, 1994, 264: 413.CrossRefGoogle Scholar
  3. 3.
    McCormack, M., Jin, S., Tiefel, T. H., Very large magnetoresistance in perovskite-like La-Ca-Mn-O thin films,Appl. Phys. Lett., 1994, 64: 3045.CrossRefGoogle Scholar
  4. 4.
    Gong Guo-Qiang, Canedy Chadweck, Xiao Gang, Colossal magnetoresistance of 1000 000-fold magnitude achieved in the antiferromagnetic phase of La1-x Cax MnO3,Appl. Phys. Leu., 1995, 67(12): 1783.CrossRefGoogle Scholar
  5. 5.
    Zener, C., Interaction between the d-shells in the transition metals,Phys. Rev., 1951, 82(3): 403.CrossRefGoogle Scholar
  6. 6.
    deGermes, P. G., Effects of double exchange in magnetic crystals,Phys. Rev., 1960, 118: 141.CrossRefGoogle Scholar
  7. 7.
    Xu Zuxiong, Xu Zhendong, Yang Huisheng et al., A generalized method for fitting complex Mössbauer spectrum,Chinese Science Bulletin, 1993, 38(21): 1761.Google Scholar
  8. 8.
    Simopoulos, A., Dallias, G., Devlin, E. et al., Spin Fluctuations in La2/3 Ca1/3 MnO3 probed by 57Fe and 19Sn M§bauer spectroscopy,Book of Abstracts, ICAME♪97: MO. T8. P15.Google Scholar
  9. 9.
    Caignaert, V., Maignan, A., Raveau, B., Up to 50 000 per cent resistance variation in magnetoresistive polycrystalline perovskites Ln2/3Sr1/3 MnO3 (Ln = Nd; Sm),Solid State Communications, 1995, 95: 357.CrossRefGoogle Scholar
  10. 10.
    Jin, S. O., Bryan, H. M., Tiefei, T. H. et al., Large magnetoresistance in polycrystalline La-Y-Ca-Mn-O,Appl. Phys. Leu., 1995, 66: 382.CrossRefGoogle Scholar
  11. 11.
    Urushibara, A., Moritomo, Y., Arima, T. et al., Insulator-metal transition and giant magnetoresistance in La1-xSrx MnO3,Phys. Rev. B, 1995, 51(14): 103.Google Scholar
  12. 12.
    Maignan, A., Simon, C., Caignaert, V., Magnetic field dependence of the resistance and magnetization of the giant magne-toresistive Pr0.7Ca0.25Sr0.05MnC 3 polycrystalline sample,J. Magn. Magn. Mater., 1996, 152: 1.CrossRefGoogle Scholar

Copyright information

© Science in China Press 1999

Authors and Affiliations

  • Wang Xiaodong 
    • 1
  • Xu Zuxiong 
    • 2
  • Ma Ruzhang 
    • 2
  1. 1.National Laboratory for Superlattices and Microstructures, Institute of SemiconductorsChinese Academy of SciencesBeijingChina
  2. 2.Department of Materials PhysiosUniversity of Science and Technology BeijingBeijingChina

Personalised recommendations