Microstructure, magnetic, and low-field magnetotransport properties of self-assembled (La0.7Sr0.3MnO3)0.5:(CeO2)0.5 vertically aligned nanocomposite thin films

Aiping Chen; Zhenxing Bi; Harshad Hazariwala; Xinghang Zhang; Qing Su; Li Chen; Quanxi Jia; Judith L Macmanus-Driscoll; Haiyan Wang

doi:10.1088/0957-4484/22/31/315712

Microstructure, magnetic, and low-field magnetotransport properties of self-assembled (La0.7Sr0.3MnO3)0.5:(CeO2)0.5 vertically aligned nanocomposite thin films

Nanotechnology. 2011 Aug 5;22(31):315712. doi: 10.1088/0957-4484/22/31/315712. Epub 2011 Jul 13.

Authors

Aiping Chen¹, Zhenxing Bi, Harshad Hazariwala, Xinghang Zhang, Qing Su, Li Chen, Quanxi Jia, Judith L Macmanus-Driscoll, Haiyan Wang

Affiliation

¹ Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX 77843, USA.

PMID: 21750374
DOI: 10.1088/0957-4484/22/31/315712

Abstract

Two-phase (La(0.7)Sr(0.3)MnO(3))(0.5):(CeO(2))(0.5) (LSMO:CeO(2)) heteroepitaxial nanocomposite films were grown on SrTiO(3) (STO) (001) by pulsed laser deposition (PLD). X-ray diffraction (XRD) and transmission electron microscopy (TEM) results show that LSMO:CeO(2) films epitaxially grow on STO as self-assembled vertically aligned nanocomposite (VAN). Magnetic and magnetotransport measurements demonstrate that the LSMO phase in the VAN structure behaves differently from its epitaxial single-phase counterpart, e.g. greatly enhanced coercivity (H(C)) and low-field magnetoresistance (LFMR). The enhanced properties in the VAN system are attributed to the interaction between the perovskite and the secondary phase or phase boundary. The results suggest that the growth of functional oxide in another oxide matrix with vertical heteroepitaxial form is a promising approach to achieve new functionality that may not be easily realized in the single epitaxial phase.

Publication types

Research Support, U.S. Gov't, Non-P.H.S.