Preparation and Magnetic Properties of (La1−x Sr1+x )(Mn0.5Co0.5)O4

  • M. Y. Lin
  • Y. F. Wang
  • D. C. Ling
  • H. S. Sheu
  • H.-C. I. Kao
Original Paper


A series of single phase (La1−x Sr1+x ) (Mn0.5Co0.5)O4 (0≤x≤0.40) materials with a tetragonal K2NiF4 structure was prepared by a solid state reaction method at 1400 or 1450 °C with a short period of heating time. Powder X-ray diffraction (XRD) and the Rietveld refinement method were employed for the structural analysis. Unit cell a- and c-axes decrease with increasing amount of Sr substitution. A discrepancy between the zero-field-cooled and the field-cooled magnetization is observed in all samples investigated below a characteristic temperature, T *, which likely arises from the canted nature of spins or the random freezing of spins. It appears that T * decreases with increasing amount of Sr substitution, which is possibly due to the enhancement of chemical pressure induced by Sr and a corresponding increases of the valence of Mn and/or Co.


(La1−xSr1+x)(Mn0.5Co0.5)O4 K2NiF4 Unit cell parameters Paramagnetic Ferromagnetic 


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  1. 1.
    Bednorz, J.G., Muller, K.A.: Z. Phys. B 64, 189 (1986) CrossRefADSGoogle Scholar
  2. 2.
    Takagi, H., Uchida, S., Kitazawa, K., Tanaka, S.: Jpn. J. Appl. Phys. 26, L123 (1987) CrossRefADSGoogle Scholar
  3. 3.
    Cava, R.J., van Dover, R.B., Batlogg, B., Rietman, E.A.: Phys. Rev. Lett. 58, 408 (1987) CrossRefADSGoogle Scholar
  4. 4.
    Kishio, K., Kitazawa, K., Kanbe, S., Yasuda, I., Sugii, N., Takagi, H., Uchida, S.-I., Fueki, K., Tanaka, S.: Chem. Lett. 429 (1987) Google Scholar
  5. 5.
    Benabad, A., Daoudi, A., Salmon, R., le Flem, G.: J. Solid State Chem. 22, 121 (1977) CrossRefADSGoogle Scholar
  6. 6.
    Rao, C.N.R., Ganguly, P., Singh, K.K., Mohan Ram, R.A.: J. Solid State Chem. 72, 14 (1988) CrossRefADSGoogle Scholar
  7. 7.
    Mohan Ram, R.A., Ganguly, P., Rao, C.N.R.: J. Solid State Chem. 70, 82 (1987) CrossRefADSGoogle Scholar
  8. 8.
    Kawano, S., Achiva, N., Kamegashira, N., Aoki, M.: J. Phys. (Paris) Colloq. 49, C8-829 (1988) CrossRefGoogle Scholar
  9. 9.
    Bouloux, J.-C., Soubeyroux, J.-L., le Flem, G., Hagenguller, P.: J. Solid State Chem. 38, 34 (1981) CrossRefADSGoogle Scholar
  10. 10.
    Moritomo, Y., Tomioka, Y., Asamitus, A., Tokura, Y., Matsui, Y.: Phys. Rev. B 51, 3297 (1995) CrossRefADSGoogle Scholar
  11. 11.
    Liu, Y.Y., Chen, X.M., Liu, X.Q.: Solid State Commun. 136, 576 (2005) CrossRefADSGoogle Scholar
  12. 12.
    Rao, C.N.R., Ganguly, P., Singh, K.K., Mohan Ram, R.A.: J. Solid State Chem. 72, 14 (1988) CrossRefADSGoogle Scholar
  13. 13.
    Bao, W., Chen, C.H., Carter, S.A., Cheong, S.-W.: Solid State Commun. 98, 55 (1996) CrossRefADSGoogle Scholar
  14. 14.
    Wu, M.H., Kao, H.-C.I.: Unpublished results Google Scholar
  15. 15.
    Larson, A.C., von Dreele, R.B.: General structure analysis system. Report La-UR-86-748, Los Alamos National Laboratory, Los Alamos, NM, USA (1990) Google Scholar
  16. 16.
    Cava, R.J., Santoro, A., Johnson, D.W. Jr., Rhodes, W.W.: Phys. Rev. B 35, 6716 (1987) CrossRefADSGoogle Scholar
  17. 17.
    Shanon, R.D.: Acta Crystallogr. A 32, 751 (1976) CrossRefADSGoogle Scholar
  18. 18.
    Moritomo, Y., Higashi, K., Matsuda, K., Nakamura, A.: Phys. Rev. B 55, 14725 (1997) CrossRefADSGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • M. Y. Lin
    • 1
  • Y. F. Wang
    • 2
  • D. C. Ling
    • 2
  • H. S. Sheu
    • 3
  • H.-C. I. Kao
    • 1
  1. 1.Department of ChemistryTamkang UniversityTamsuiTaiwan
  2. 2.Department of PhysicsTamkang UniversityTamsuiTaiwan
  3. 3.National Synchrotron Radiation Research CenterHsinchuTaiwan

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