Resurrected and Tunable Conductivity and Ferromagnetism in the Secondary Growth La_0.7Ca_0.3MnO₃ on Transferred SrTiO₃ Membranes

Abstract

To avoid the epitaxy dilemma in various thin films, such as complex oxide, silicon, organic, metal/alloy, etc., their stacking at an atomic level and secondary growth are highly desired to maximize the functionality of a promising electronic device. The ceramic nature of complex oxides and the demand for accurate and long-range-ordered stoichiometry face severe challenges. Here, the transport and magnetic properties of the La 0.7 Ca 0.3 MnO 3 (LCMO) secondary growth on single-crystal freestanding SrTiO 3 (STO) membranes are demonstrated. It has been experimentally found that on an only 10 nm thick STO membrane, the LCMO can offer a bulk-like Curie temperature (T C ) of 253 K and negative magnetoresistance of −64%, with a weak dependence on the thickness. The resurrected conductivity and ferromagnetism in LCMO confirm the advantages of secondary growth, which benefits from the excellent flexibility and transferability. Additionally, this study explores the integration strategy of complex oxides with other functional materials.

RETRACTED: Impact of High-Frequency Traveling-Wave Magnetic Fields on Low-Conductivity Liquids: Investigation and Potential Applications in the Chemical Industry

“…Despite these advancements, further research is necessary, particularly in exploring the potential of electromagnetic drive technology in low-conductivity liquids. Recent scientific investigations have studied a wide range of materials and their mechanical and chemical properties [33][34][35][36][37]. These studies include the manipulation of charge density in a solid-liquid triboelectric nanogenerator system, the development of sulfur-doped carbon-enhanced nanocomposites for sodium-ion storage, and the analysis of composite solid electrolytes for all-solid-state lithium metal batteries.…”

Mechanical and thermal response of XFe2O4 (X = Zn, Ag and Co) spinel ferrites via IR-spectroscopy and first-principles calculations

“…The computations were performed by Vienna ab-initio Simulation Package (VASP) based on density functional theory (DFT) [34]. We have optimized the geometry with a Γ-centered k-mesh of 15 × 15 × 1 with a cut-off energy of 600 eV to in integrate the Brillouin-zone.…”

“…We optimized the atomic positions and lattice constants with the help of conjugate gradient method with force criterion of 0.001 eV Å. To overcome the underestimation in electronic band gap value using GGA [35][36][37], we have used the Heyd-Scuseria-Ernzerhof (HSE06) hybrid functional (HSE06) [34] with screening parameter 0.2 Å −1 [38,39]. The HSE06 is believed to estimate the electronic bandgap comparable to the experimental one.…”

Exploring the Potential of Nitrogen-Doped Graphene in ZnSe-TiO2 Composite Materials for Supercapacitor Electrode

“…From Figure 3, three broad peaks are observed from the spectrum of NG-ZnSe which are centered about 215, 453, and 1680 cm −1 . The peaks located at 215 and 453 cm −1 are ascribed to the longitudinal optic (LO), transverse optic (TO) and double phonon modes of ZnSe [36][37][38]. The Raman spectra for NG-TiO2 is observed at 233, 395, and 568 cm −1 .…”