Skip to main content Accessibility help

Role of boundaries on low-field magnetotransport properties of La0.7Sr0.3MnO3-based nanocomposite thin films

  • Aiping Chen (a1), Wenrui Zhang (a1), Jie Jian (a1), Haiyan Wang (a1), Chen-Fong Tsai (a2), Qing Su (a2), Quanxi Jia (a3) and Judith L. MacManus-Driscoll (a4)...


The effects of boundaries such as grain boundaries and phase boundaries on low-field magnetoresistance (LFMR) have been investigated in single-phase lanthanum strontium manganates, in this case La0.7Sr0.3MnO3 (LSMO) and LSMO: zinc oxide (ZnO) nanocomposite thin films. In the pure LSMO films with similar grain size, it is found that the LFMR increases as the grain misorientation factor (β) increases. The LFMR in the nanocomposite films is greatly enhanced, as compared with single-phase films, due to the reduced grain size, and increased phase boundary (PB) and β effects. The composition study shows that the LFMR can be dramatically enhanced when the secondary phase content approaches the percolation threshold. The increased β and secondary phase concentration reduce the cross-section of electron conduction paths and favor the formation of the quasi-one-dimensional transport channels. Our results demonstrate that the reduction of cross-section of the electron conduction paths by tuning the grain orientation and secondary phase composition is necessary for enhancing LFMR effect.


Corresponding author

a)Address all correspondence to this author. e-mail:


Hide All
1.Buban, J.P., Matsunaga, K., Chen, J., Shibata, N., Ching, W.Y., Yamamoto, T., and Ikuhara, Y.: Grain boundary strengthening in alumina by rare earth impurities. Science 311, 212 (2006).
2.Hsu, H.S., Huang, J.C.A., Chen, S.F., and Liu, C.P.: Role of grain boundary and grain defects on ferromagnetism in Co:ZnO films. Appl. Phys. Lett. 90, 102506 (2007).
3.Hwang, H.Y., Cheong, S.W., Ong, N.P., and Batlogg, B.: Spin-polarized intergrain tunneling in La2/3Sr1/3MnO3. Phys. Rev. Lett. 77, 2041 (1996).
4.Li, X.W., Gupta, A., Xiao, G., and Gong, G.Q.: Low-field magnetoresistive properties of polycrystalline and epitaxial perovskite manganite films. Appl. Phys. Lett. 71, 1124 (1997).
5.Kang, B.S., Wang, H., MacManus-Driscoll, J.L., Li, Y., Jia, Q.X., Mihut, I., and Betts, J.B.: Low field magnetotransport properties of (La0.7Sr0.3MnO3)0.5:(ZnO)0.5 nanocomposite films. Appl. Phys. Lett. 88, 3 (2006).
6.Staruch, M., Hires, D., Chen, A.P., Bi, Z., Wang, H., and Jain, M.: Enhanced low-field magnetoresistance in La0.67Sr0.33MnO3:MgO composite films. J. Appl. Phys. 110, 113913 (2011).
7.Gupta, A., Gong, G.Q., Xiao, G., Duncombe, P.R., Lecoeur, P., Trouilloud, P., Wang, Y.Y., Dravid, V.P., and Sun, J.Z.: Grain-boundary effects on the magnetoresistance properties of perovskite manganite films. Phys. Rev. B 54, 15629 (1996).
8.Rivas, J., Hueso, L.E., Fondado, A., Rivadulla, F., and Lopez-Quintela, M.A.: Low field magnetoresistance effects in fine particles of La0.67Ca0.33MnO3 perovskites. J. Magn. Magn. Mater. 221, 57 (2000).
9.Chen, A.P., Bi, Z.X., Tsai, C.F., Chen, L., Su, Q., Zhang, X.H., and Wang, H.Y.: Tilted aligned epitaxial La0.7Sr0.3MnO3 nanocolumnar films with enhanced low-field magnetoresistance by pulsed laser oblique-angle deposition. Cryst. Growth Des. 11, 5405 (2011).
10.Ziese, M.: Grain-boundary magnetoresistance in manganites: Spin-polarized inelastic tunneling through a spin-glass-like barrier. Phys. Rev. B 60, R738 (1999).
11.Yang, H., Cao, Z.E., Shen, X., Xian, T., Feng, W.J., Jiang, J.L., Feng, Y.C., Wei, Z.Q., and Dai, J.F.: Fabrication of 0-3 type manganite/insulator composites and manipulation of their magnetotransport properties. J. Appl. Phys. 106, 104317 (2009).
12.Yan, L., Kong, L.B., Yang, T., Goh, W.C., Tan, C.Y., Ong, C.K., Rahman, M.A., Osipowicz, T., and Ren, M.Q.: Enhanced low field magnetoresistance of Al2O3-La0.7Sr0.3MnO3 composite thin films via a pulsed laser deposition. J. Appl. Phys. 96, 1568 (2004).
13.Miao, J.H., Yuan, L., Wang, Y.Q., Shang, J.L., Yu, G.Q., Ren, G.M., Xiao, X., and Yuan, S.L.: Electrical transport and magnetoresistance in La2/3Ca1/3MnO3/CuO composites. Mater. Lett. 60, 2214 (2006).
14.Eshraghi, M., Salamati, H., and Kameli, P.: The effect of NiO doping on the structure, magnetic and magnetotransport properties of La0.8Sr0.2MnO3 composite. J. Alloys Compd. 437, 22 (2007).
15.Gao, L., Bai, L.F., Li, C.S., Liu, X.H., Wu, Z.W., Zheng, D.N., and Lu, Y.F.: Electrical transport and magnetoresistance in La2/3Ca1/3MnO3/BaZrO3 composites. J. Alloys Compd. 522, 25 (2012).
16.Chen, F.Y., Wu, Y.Y., Xiong, Y.H., Li, L.J., Liu, Z.L., and Xiong, C.S.: Electrical properties and enhanced room temperature magnetoresistance in La0.7Ca0.2Sr0.1MnO3/Pd composites prepared by chemical plating. J. Magn. Magn. Mater. 324, 3286 (2012).
17.Lin, Y.B., Huang, Z.G., Yang, Y.M., Wang, S., Li, S.D., Zhang, F.M., and Du, Y.W.: Giant positive magnetoresistance in heterostructure (La0.7Sr0.3MnO3) coated with YBa2Cu3O7 composites. Appl. Phys. A 104, 143 (2011).
18.Kang, Y.M., Kim, H.J., and Yoo, S.I.: Excellent low field magnetoresistance properties of the La0.7Sr0.3Mn1+dO3-manganese oxide composites. Appl. Phys. Lett. 95, 052510 (2009).
19.Lu, W.J., Sun, Y.P., Zhu, X.B., Song, W.H., and Du, J.J.: Low-field magnetoresistance in La0.8Sr0.2MnO3/ZrO2 composite system. Mater. Lett. 60, 3207 (2006).
20.Kim, H.J. and Yoo, S.I.: Enhanced low field magnetoresistance in La0.7Sr0.3MnO3-La2O3 composites. J. Alloys Compd. 521, 30 (2012).
21.Zi, Z.F., Fu, Y.K., Liu, Q.C., Dai, J.M., and Sun, Y.P.: Enhanced low-field magnetoresistance in LSMO/SFO composite system. J. Magn. Magn. Mater. 324, 1117 (2012).
22.Chen, A.P., Bi, Z.X., Hazariwala, H., Zhang, X.H., Su, Q., Chen, L., Jia, Q.X., MacManus-Driscoll, J.L., and Wang, H.Y.: Microstructure, magnetic, and low-field magnetotransport properties of self-assembled (La0.7Sr0.3MnO3)0.5:(CeO2)0.5 vertically aligned nanocomposite thin films. Nanotechnology 22, 315712 (2011).
23.Bhame, S.D., Fagnard, J.F., Pekala, M., Vanderbemden, P., and Vertruyen, B.: La0.7Ca0.3MnO3/Mn3O4 composites: Does an insulating secondary phase always enhance the low field magnetoresistance of manganites? J. Appl. Phys. 111, 063905 (2012).
24.Wang, X.L., Dou, S.X., Liu, H.K., Ionescu, M., and Zeimetz, B.: Large low-field magnetoresistance over a wide temperature range induced by weak-link grain boundaries in La0.7Ca0.3MnO3. Appl. Phys. Lett. 73, 396 (1998).
25.Chen, A.P., Zhang, W., Khatkatay, F., Su, Q., Tsai, C-F., Chen, L., Jia, Q.X., MacManus Driscoll, J.L., and Wang, H.: Magnetotransport properties of quasi-one-dimensionally channeled vertically aligned heteroepitaxial nanomazes. Appl. Phys. Lett. 102, 093114 (2013).
26.Bi, Z.X., Weal, E., Luo, H.M., Chen, A.P., MacManus-Driscoll, J.L., Jia, Q.X., and Wang, H.Y.: Microstructural and magnetic properties of (La0.7Sr0.3MnO3)0.7:(Mn3O4)0.3 nanocomposite thin films. J. Appl. Phys. 109, 054302 (2011).
27.Chen, A.P., Bi, Z.X., Tsai, C.F., Lee, J., Su, Q., Zhang, X.H., Jia, Q.X., MacManus-Driscoll, J.L., and Wang, H.Y.: Tunable low-field magnetoresistance in (La0.7Sr0.3MnO3)0.5:(ZnO)0.5 self-assembled vertically aligned nanocomposite thin films. Adv. Funct. Mater. 21, 2423 (2011).
28.Chen, A.P., Bi, Z.X., Jia, Q.X., MacManus-Driscoll, J.L., and Wang, H.Y.: Microstructure, vertical strain control and tunable functionalities in self-assembled, vertically aligned nanocomposite thin films. Acta Mater. 61, 2783 (2013).
29.Yang, Y.F., Long, H., Yang, G., Chen, A.P., Zheng, Q.G., and Lu, P.X.: Femtosecond laser deposited zinc oxide film and its optical properties. Vacuum 83, 892 (2009).

Role of boundaries on low-field magnetotransport properties of La0.7Sr0.3MnO3-based nanocomposite thin films

  • Aiping Chen (a1), Wenrui Zhang (a1), Jie Jian (a1), Haiyan Wang (a1), Chen-Fong Tsai (a2), Qing Su (a2), Quanxi Jia (a3) and Judith L. MacManus-Driscoll (a4)...


Altmetric attention score

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed