We have synthesized a range of transition-metal-doped BiFeO(3) thin films on conducting silicon substrates using spin-coating technique from metal-organic precursor solutions. Bismuth, iron and transition-metal-organic solutions were mixed in the appropriate ratios to produce 3% samples. X-ray diffraction studies show that samples annealed nitrogen atmosphere crystallize rhombohedrally distorted structure with no evidence for any ferromagnetic secondary phase formation. find disappearance...

Aqueous zinc metal batteries show great promise in large-scale energy storage. However, the decomposition of water molecules leads to severe side reactions, resulting limited lifespan Zn batteries. Here, tetrahydrofuran (THF) additive was introduced into sulfate (ZnSO4) electrolyte reduce activity by modulating solvation structure hydration layer. The THF molecule can play as a proton acceptor form hydrogen bonds with molecules, which prevent water-induced undesired reactions. Thus, an...

Abstract Due to their distinctive morphology, significant surface-to-volume ratio, and metal-like electrical conductivity, MXenes have emerged as highly promising gas-sensing materials. Traditional MXene-based gas sensors predominantly rely on the conductivity of for signal transduction. However, it is crucial explore alternative transduction mechanisms fully unlock potential in sensing applications. In this study, we successfully showcased development a mass-transduction-based MXene sensor,...

The transformation of Fe nanoparticles by trioctylphosphine (TOP) to phase-pure samples either Fe2P or FeP is reported. were synthesized the decomposition Fe(CO)5 in a mixture octadecene and oleylamine at 200 °C subsequently reacted with TOP temperatures region 350−385 yield iron phosphide nanoparticles. Shorter reaction times favored an iron-rich product (Fe2P), longer phosphorus-rich (FeP). temperature was also crucial factor determining phase final product, higher favoring lower Fe2P. We...

The increasing interest in spin-based electronics has led to a vigorous search for new materials that can provide high degree of spin polarization electron transport. An ideal candidate would act as an insulator one channel and conductor or semiconductor the opposite channel, corresponding respective cases half-metallicity spin-gapless semiconductivity. Our first-principle electronic-structure calculations indicate metallic Heusler compound Ti2MnAl becomes half-metallic semiconducting if...

The optical properties, Raman spectra, and magnetization of Zn1−xCoxO (0≤x<0.1) thin films are reported. Optical transmission spectra confirm the substitution Co2+ cations for Zn2+ ions at tetrahedral sites ZnO. annealed in air show an additional broad vibrational mode, attributed to disordered –Zn–O–Co– local vibrations. These modes disappear on vacuum annealing, suggesting formation oxygen vacancies close dopant (–Zn––Co–). Magnetization measurements that air-annealed lack significant...

We present evidence for spin polarized charge carriers in In$_2$O$_3$ films. Both and Cr doped films exhibit room temperature ferromagnetism after vacuum annealing, with a saturation moment of approximately 0.5 emu/cm$^3$. used Point Contact Andreev Reflection measurements to directly determine the polarization, which was found be 50$\pm$5% both compositions. These results are consistent suggestions that observed certain oxide semiconductors may carrier mediated.

The magnetic and optical properties of multiferroic GdMnO3 nanoparticles synthesized by a polymerized complex method have been investigated. crystallized in orthorhombic perovskite-type structure. zero-field-cooled field-cooled magnetizations show that complicated transitions occur temperature range from 2 to 60 K, which were confirmed hysteresis loops. Three shoulder absorption peaks centered at about 2.0, 2.3, 2.7 eV are attributed the Mn (3d)-electronic transitions, while an peak around...

Rock-salt NiO and Ni0.7Zn0.3O nanoparticles were investigated by x-ray diffraction, atomic-force microscopy, magnetic measurements. Nanoparticle diameters varied from 8 to 30 nm depending on reaction conditions. There are two main magnetization contributions, the field-induced spin canting of antiferromagnetic sublattices rotation caused uncompensated spins interacting with field. The former is a bulk effect, modified presence Zn, whereas latter nanoscale effect that increases decreasing...

Structural, electronic, and magnetic properties of a Heusler-type CoFeCrAl alloy have been investigated experimentally by model calculations, with focus on the alloy's spin-gapless semiconductivity. The as-quenched samples are ferrimagnetic at room temperature Curie about 456 K, which increases to 540 K after vacuum annealing 600 °C for 2 h. saturation magnetizations °C-annealed 1.9 µB/f.u. 2.1 µB/f.u., respectively, very close value predicted Slater–Pauling curve. resistivity shows nearly...

The structural, magnetic and electron-transport properties of cubic Mn3Ga have been investigated. alloys prepared by arc melting melt-spinning show an antiferromagnetic spin order at room temperature but undergo coupled structural phase transitions 600 800 K. First-principles calculations that the observed are consistent with a crystallizing in disordered Cu3Au-type structure. samples exhibit metallic electron transport resistance minimum near 30 K, followed logarithmic upturn below minimum....

Nanostructured MnyGa ribbons with varying Mn concentrations including Mn1.2Ga, Mn1.4Ga, Mn1.6Ga, and Mn1.9Ga were prepared using arc-melting melt-spinning followed by a heat treatment. Our experimental investigation of the nanostructured shows that material y = 1.2, 1.4, 1.6 prefers tetragonal L10 structure 1.9 D022 structure. We have found maximum saturation magnetization 621 emu/cm3 in Mn1.2Ga which decreases monotonically to 300 as reaches 1.9. Although both L10- D022-MnyGa samples show...

Here, we present results of combined experimental and computations study V2CoAl, a Heusler alloy that exhibits nearly perfect spin-polarization. Our calculations indicate this material maintains high degree spin-polarization (over 90%) in the wide range lattice parameters, except at largest considered unit cell volume. The magnetic alignment V2CoAl is ferrimagnetic, due to antialignment moments vanadium atoms their two sublattices. calculated total moment per formula integer optimal...

The structural and magnetic properties of MnTa2O6, Cr0.5Mn0.5Ta2O6, Fe0.5Mn0.5Ta2O6 compounds prepared using solid-state reaction have been investigated. x-ray diffraction data indicates that the parent compound MnTa2O6 has an orthorhombic crystal structure with space group Pbcn, whereas substituted Fe2+ Cr2+ both crystallize in tetragonal structure. thermomagnetic measurement shows is antiferromagnetic Néel temperature 6 K. samples also remain temperatures 6.5 5 K respectively. Curie-Weiss...

Here, we present results of a computational study electronic, magnetic, and structural properties FeVTaAl FeCrZrAl, quaternary Heusler alloys that have been recently reported to exhibit spin-gapless semiconducting behavior. Our calculations indicate these materials may crystallize in regular cubic structure, which has significantly lower energy than the inverted phase. Both FeCrZrAl ferromagnetic alignment, with an integer magnetic moment per unit cell at equilibrium lattice constant. Band...