Ferroelectric and Ferromagnetic Behavior of Pb(Zr_0.52Ti_0.48)O₃–Co_0.9Zn_0.1Fe₂O₄ Multilayered Thin Films Prepared via Solution Processing

Abstract

Multilayered multiferroic nanocomposite films of Pb(Zr0.52Ti0.48)O3 (PZT) and Co0.9Zn0.1Fe2O4 (CZFO) are prepared on general Pt/Ti/SiO2/Si substrates via a simple solution‐processing method. Structural characterization by X‐ray diffraction and electron microscopy techniques reveals good surface and cross‐sectional morphologies of these multilayered thin films. In particular, at room temperature strong ferroelectric and ferromagnetic responses are simultaneously observed in the multilayered thin films, depending on the deposited sequences and volume fractions of ferroelectric PZT phase and magnetic CZFO phase.

Magnetoelectric and multiferroic properties of variously oriented epitaxial BiFeO3–CoFe2O4 nanostructured thin films

“…[5][6][7][8][9][10] Through a strictive interaction between the piezoelectricity of the ferroelectric ͑FE͒ phase and the magnetostriction of the ferromagnetic ͑FM͒ phase, said composites are capable of producing relatively large ME coefficients. The most widely studied phase connectivities for twophase ME composite films are ͑i͒ a ͑2-2͒ layer-by-layer structure [11][12][13][14][15][16][17][18] and ͑ii͒ a ͑0-3͒ structure of second phase particles embedded in a primary matrix phase. 19,12,[20][21][22][23] In addition, ͑1-3͒ self-assembled ME composite thin films consisting of FE ͓or ͑FM͔͒ nanopillars embedded in a FM ͑or FE͒ matrix was first reported in 2004.…”

Magnetoelectric quasi-(0-3) nanocomposite heterostructures

“…The average ME properties can be tailored by choosing not only suitable individual component phases but also composite architectures. On the micro-or nano-scale, the current phase connectivity architectures, which have been extensively studied for the ME composite thin films, can be summarized by two types: (i) vertical heteroepitaxial nanocomposites with nanorods of one phase embedded in a matrix of the other (named as 1-3) (refs [12][13][14][15][16]; and (ii) multilayering (named as 2-2) (refs [17][18][19][20][21]. However, there are shortcomings for both of these forms: the effective ME coupling of the (2-2) film connectivity is limited by the clamping of films to the substrate 22 , while the low resistivity of the interconnected ferromagnetic phase of the (1-3) structure lowers the net resistivity of the composite layer, which in turn provides a path for dielectric leakage current.…”

Simultaneous enhancements of polarization and magnetization in epitaxialPb(Zr0.52Ti0.48)O3/Mukherjee1, Hordagoda2, Lampen3 et al. 2015Phys. Rev. B29390View full textAdd to dashboardCite

“…In this respect, ME composite thin films [6] comprised of layered FE and FM materials [7,8] are of special interest due to their potential applications in ME random access memories [9] and ME microsensors [10]. To date, the ME effect has be extensively reported on in multiferroic layered structures in which the state-of-the-art FE perovskite Pb(Zr 1-x Ti x )O 3 (PZT) is paired with the hard magnetic spinel-ferrite CoFe 2 O 4 [11,12]. Typically, the observed ME coupling in piezoelectric/magnetostrictive PZT/CFO bilayered films has been attributed to their interfacial strains [13]: the presence of the CFO layer imposes an in-plane tensile stress on the PZT layer across the interface, increasing the interactive stress between the CFO and PZT layers and hence the ME coupling [6].…”