Magnetically Correlated Schottky Barrier in the La_1.8Ca_1.2Mn₂O₇ Double-Layered Perovskite Ceramic

Abstract:

Double-layered La_1.8Ca_1.2Mn₂O₇ sample with a perovskite structure was synthesized by solid state reaction and electrical transport properties were investigated using 4-wire direct current (DC) and 2-wire alternating current (AC) measurement methods. The result reveals that the I-V characteristic of the La_1.8Ca_1.2Mn₂O₇ ceramic exhibits a linear behaviour above Curie temperature (T_C) while it shows a strong nonlinearity below T_C. The nonlinear coefficient increases with decreasing temperatures and reaches a maximum of 60.5 at 14 K for the limit of the experiment. We believe that a magnetically correlated Schottky barrier forming at the grain boundary is the main factor to control the transport properties for the La_1.8Ca_1.2Mn₂O₇ ceramic.

• Periodical: Advanced Materials Research (Volume 873)
• Pages: 744-747
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.873.744
• Online since: December 2013
• Authors: Shun Sheng Chen*, Da Wei Shi, Hong Xia Wang, Chang Ping Yang, Hai Bo Xiao, Bärner Klaus, Vyachslav Medvedeva
• Keywords: Double Layered Perovskite, Manganite, Nonlinearity, Schottky Barrier

References

[1] J.B. Philipp, J. Klein, C. Recher, T. Walther, W. Mader, M. Schmid, R. Suryanarayanan, L. Alff and R. Gross: Phys. Rev. B Vol. 65 (2002), pp.184411-1.

[2] T.G. Perring, G. Aeppli, Y. Moritomo and Y. Tokura: Phys. Rev. Lett. Vol. 78 (1997), p.3197.

[3] R. Osborn, S. Rosenkranz, D.N. Argyriou, L. Vasiliu-Doloc, J.W. Lynn, S.K. Sinha, J.F. Mitchell, K.E. Gray and S. D. Bader: Phys. Rev. Lett. Vol. 81 (1998), p.3964.

[4] C. D. Potter, Maribeth Swiatek, S.D. Bader, D.N. Argyriou, J.F. Mitchell, D.J. Miller, D.G. Hinks and J.D. Jorgensen: Phys. Rev. B Vol. 57(1998), p.72.

[5] Y. Mooritomo, A. Asamitsu, H. Kuwahara and Y. Tokura: Nature, Vol. 380 (1996), p.141.

[6] H. Asano, J. Hayakawa and M. Matsui: Appl. Phys. Lett. Vol. 68 (1996), p.3638.

[7] T. Kimura, A. Asamitsu, Y. Tomioka and Y. Tokura: Phys. Rev. Lett. Vol. 79 (1997), p.3720.

[8] H. Asano, J. Hayakawa and M. Matsui: Phys. Rev. B Vol. 56 (1997), p.5395.

[9] H. Asano, J. Hayakawa and M. Matsui: Appl. Phys. Lett. Vol. 70 (1997), P. 2303.

[10] Y. Konishi, T. Kimura, M. Izumi, M. Kawasaki and Y. Tokura: Appl. Phys. Lett. Vol. 73 (1998), p.3004.

[11] B. Vertruyen, R. Cloots, A. Rulmont, G. Dhalenne, M. Ausloos and Ph. Vanderbemden: J. Appl. Phys. Vol. 90 (2001), p.5692.

DOI: 10.1063/1.1410885

[12] C.P. Yang, S.S. Chen, Z.H. Zhou, L.F. Xu,  H. Wang, J.F. Hu, V. Morchshakov and K. Barner: J. Appl. Phys. Vol. 101 (2007), p.063909.

[13] C.P. Yang, S.S. Chen, Q. Dai, D.H. Guo and H. Wang: Acta Phys. Sin. Vol. 56 (2007), p.4908.