Magnetoresistance of La2/3(CaxBa1-x)1/3MnO3/NiO Composite Materials

摘要:

文章预览

Ferromagnetic (FM) La2/3(Ca0.6Ba0.4)1/3MnO3 and antiferromagnetic (AFM) NiO nanoparticles were synthesized using sol-gel method, respectively. La2/3(Ca0.6Ba0.4)1/3MnO3 (1 mol)/ x NiO (x= 0, 0.05 and 0.15mol) composites with the coated NiO were prepared. The experimental results indicate that, both phases of LCBMO and NiO coexist clearly in the composites and the sizes of the NiO nanoparticles in the intergranular region between the LCBMO particles are very small; the interface of NiO influences evidently the value of MR and it is found that the tunneling MR for x=0.05 is the largest in three samples. The magnetoresistance behavior has been explained by two-level model of tunneling magnetoresistance and percolation model well.

信息:

期刊:

主题:

编辑:

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

页数:

897-900

引用:

S. Y. Chen et al., "Magnetoresistance of La2/3(CaxBa1-x)1/3MnO3/NiO Composite Materials", Materials Science Forum, Vols. 475-479, pp. 897-900, 2005

上线时间:

January 2005

输出:

价格:

$38.00

[1] J.S. Moodera, Lisa R. Kinder, Terrilyn M. Wong et al.: Phys. Rev. Lett. 74, 3273(1995).

[2] P. Chen, D.Y. Xing, Y.W. Du, J.M. Zhu and D. Feng, Phys. Rev. Lett. 87, 107202-1 (2001).

[3] J.J. Versluijs, M.A. Bari and J.M.D. Coey, Phys. Rev. Lett. 87, 026601 (2001).

[4] Zhigao Huang, Zhigao Chen, Kun Peng, et. al: Phys. Rev. B Vol. 69(2004), p.094420.

[5] D. Das, P. Chowdhury, R.N. Daset al: J. Magn. Magn. Mater. Vol. 238(2002), p.178.

[6] S. Pal, A. Banerjee, S. Chatterjee et al: J. Appl. Phys. Vol. 94(2003), p.3485.

[7] Yun-Hui Huang, Chun-Hua Yan, Feng Luo et al: Appl. Phys. Lett. Vol. 81(2002), p.76.

[8] S. Gupta, R. Ranjit, C. Mitra et al: Appl. Phys. Lett. Vol. 78(2001), p.362.

[9] L.I. Balcells A.E. Carrillo,B. Martinez,J. Fontcuberta, Appl. Phys. Lett. Vol. 74(2001), p.4104.

[10] T. Kanki, H. Tanaka and T. Kawai: J. Appl. Phys. Vol. 93(2003), p.4718.

[11] J.M. Liu, G.L. Yuan, H. Sang et al: Appl. Phys. Lett. Vol. 78(2001), p.1110.

[12] J. Rivas, L.E. Hueso, A. Fondado et al: J. Magn. Magn. Mater. Vol. 221(2000), p.57.

[13] Zhigao Huang, Zhigao Chen et al: in Advanced Nanomaterials and Nanodevices (Pro. IUMRS-ICEM, Xi'an, China, 10-14 Tune 2002), edited by Hongjun Gao, Harald Fuchs and Dongmin Chen (IOP, University of Reading, Berkshire, 2003), p.818.