Effect of Substitution of Magnetic Metal Ions on Magnetic and Magnetoresistance Properties in LaSr2Mn2O7


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The layered manganese oxides LaSr2Mn2-xTxO7 (T=Fe, Cr and Ni) has been prepared. The effect of substitution of transition metal ions for Mn on magnetic and magtoresistance properties has been studied. The compound has a tetragonal symmetry and the lattice parameters a decreases with increasing the doped content but the parameter c increases with x. It indicates that the MnO6 octahedron increase the distortion with x content. With the x increase, their ferromagnetic property was depressed. The Neel temperature TN was depressed gradually from 138K to 89K, 95K and 85K at x=0.3 for T=Fe, Ni and Cr respectively. Their magnetoresistance MR is gradually enhanced for all doped system. It suggests that the introduce of disorder in B-site have an important effect on the magnetic exchange and magnetoresistance because of the weaken of the double-exchange (DE) interaction.



Materials Science Forum (Volumes 475-479)

Main Theme:

Edited by:

Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie




J. Feng et al., "Effect of Substitution of Magnetic Metal Ions on Magnetic and Magnetoresistance Properties in LaSr2Mn2O7", Materials Science Forum, Vols. 475-479, pp. 2227-2230, 2005

Online since:

January 2005




[1] C.N.R. Rao: Chem. Matt. Vol. 8 (1996), p.2421.

[2] A.P. Ramirez: J. Phys.: Condensed Matter. Vol. 9 (1997), p.8171.

[3] R. Laiho, K.G. Lisunov, E. Laheranta et al.: J. Magn. Magn. Mater. Vol. 250 (2002), p.267.

[4] A. Maignan, C. Martin, F. Damay et al.: J. Magn. Magn. Mater. Vol. 188 (1998), p.185.

[5] I.O. Troyanchuk: J. Magn. Magn. Mater. Vol. 231 (2001), p.53.

[6] B. Raveau, A. Maignan, C. Martin, M. Hervieu: Mater. Res. Bull. Vol. 35 (2000), p.1579.

[7] Z.S. Gonen, J. Gopalakrishnan, S.A. Sirchio et al.: J Solid State Chem. Vol. 159 (2001), p.68.

[8] S. Hébert, A. Maignan, C. Martin and B. Raveau: Solid State Comm.

[9] F. Damay, C. Martin, A. Martin, A. Maignan, B. Raveau: J. Magn. Magn. Mater. Vol. 183 (1998), p.143.

[10] J.Q. Li, C. Dong, L.H. Liu, Y.M. Ni: Phys. Rev. B. Vol. 64 (2001), p.174413.

[11] U.H. Bents: Phys. Rev. Vol. 106 (1957), p.225.

[12] R. Gundakaram, A. Arulraj, P.V. Vanitha. et al.: J. solid state chem. Vol. 127, (1996), p.354.

[13] B. Reveal, C. Martin, A. Malignant, et al.: Phys. C. Vol. 314-348 (2000), p.711.

[14] Y. Moritomo, Y. Maruyama, T. Akimoto, A. Nakamura: Phys Rev. B Vol. 56 (1997), p. R7057.

[15] C.H. Shen, R.S. Liu, S.F. Hu. J.G. Lin, et al.: J. Appl. Phys Vol. 86 (1999), p.2178.

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