Role of scaffold network in controlling strain and functionalities of nanocomposite films

Abstract

The tuning of functional properties in thick oxide films via nanoscaffolds induced large vertical lattice strain.

Three-dimensional strain engineering in epitaxial vertically aligned nanocomposite thin films with tunable magnetotransport properties

“…For example, changing the dimension and density of MgO, Chen et al altered the strain and magnetic properties of LSMO-MgO VAN systems and tripled the MR value to 40% at 20 K. 11 Similarly, the LFMR value of the LSMO-CeO 2 VAN structure was enhanced from 5% to 21% at 20 K by reducing the secondary phase domain size from B7 nm to B3 nm. 38 Fan et al…”

“…La 0.7 Sr 0.3 MnO 3 (LSMO) is selected as the matrix for this 3D strain design as it has shown a strong CMR effect, magnetic anisotropy, spin-glass like behavior, and LFMR properties. 11,22,36,37 Various secondary phases have been demonstrated for enhanced LFMR in LSMO VAN films. 19,[36][37][38][39] CeO 2 is selected as the insulating secondary phase embedded in the LSMO matrix, because of its good in-plane lattice match with LSMO and STO after a 451 in-plane rotation ( Fig.…”

“…Using VANs, a broad range of multifunctionalities, such as multiferroicity, ferroelectricity, low field magnetoresistance (LFMR), and anisotropic electrical/ionic transport properties have been demonstrated. 11,17,20,22,25,30 3D nanostructured materials such as branched nanorods or nanoforests have attracted extensive research attentions because of their unique 3D nature. Taking full advantages of the vertical and horizontal dimensions, these 3D nanostructures exhibit many fascinating physical and chemical properties because of the highly enhanced interfacial area and stability, compared to the one-dimensional (1D) nanowire arrays.…”

“…[9][10][11][12] Strain engineering has been agreed on as one of the most effective approaches for such structural and property tuning. [10][11][12][13] Great effort has been devoted to exploring effective strain engineering. One of the most effective approaches is substrate strain control where various substrates with different lattice parameters are explored for in-plane strain control.…”

Thickness Dependence of Photoconductance in Strained BiFeO3 Thin Films With Planar Device Geometry

“…The combined AFM and XRD results confirm that the pure T phase exists in the BFO films thinner than 50 nm, while the T‐R mixed phase gradually prevails with increasing film thickness. It is worth mentioning that the critical thickness may be further increased via the approach of vertical strain control …”