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High-temperature insulating ferromagnetic state in charge-disproportionated and spin-state-disproportionated strained SrCoO2.5 thin film Open
Ferromagnetic insulators (FMIs) have widespread applications in microwave devices, magnetic tunneling junctions, and dissipationless electronic and quantum-spintronic devices. However, the sparsity of the available high-temperature FMIs ha…
Navigating the magnetic contribution of the commonly used single-crystal substrates SrTiO<sub>3</sub> (100) and LaAlO<sub>3</sub> (100) in weak magnetic thin films Open
In recent years, thin films of weak ferromagnetic materials have been in huge demand; however, probing their magnetic characteristics has been difficult due to contributions from underlying substrates. In the present study, we have analyze…
Room temperature reversible colossal volto-magnetic effect in all-oxide metallicmagnet/topotactic-phase-transition material heterostructures Open
Multiferroic materials have undergone extensive research in the past two decades in an effort to produce a sizable room-temperature magneto-electric (ME) effect in either exclusive or composite materials for use in a variety of electronic …
Light-induced giant and persistent changes in the converse magnetoelastic effects in Ni/BaTiO3 multiferroic heterostructure Open
Magnetoelastic and magnetoelectric coupling in the artificial multiferroic heterostructures facilitate valuable features for device applications such as magnetic field sensors and electric write magnetic-read memory devices. In a ferromagn…
Realizing Low-Temperature Charge-Transfer-Type Insulating Ground State in Strained V<sub>2</sub>O<sub>3</sub> Thin Film Open
Controlling the electronic properties of strongly correlated systems, observing electron-electron correlation-driven metal to insulator transition (MIT) is a key point for the next-generation solid-state Mottronic devices. Thus, the knowle…
View article: Evolution of magnetic and structural properties of MgO thin film with vacuum annealing
Evolution of magnetic and structural properties of MgO thin film with vacuum annealing Open
In this work, investigation of MgO thin film, deposited via e-beam evaporation is carried out with increasing annealing temperature. Structural properties, as elucidated using X-ray based techniques viz. grazing incidence XRD and X-ray ref…
Improved photocatalytic activity of TiO<sub>2</sub> nanoparticles through nitrogen and phosphorus co-doped carbon quantum dots: an experimental and theoretical study Open
In this work, we are developing a photocatalyst wherein, nitrogen and phosphorus co-doped carbon quantum dots are scaffolded onto TiO 2 nanoparticles (NPCQD/TiO 2 ), denoted as NPCT.
View article: <i>In situ</i> N <i>K</i>-edge XANES study of iron, cobalt and nickel nitride thin films
<i>In situ</i> N <i>K</i>-edge XANES study of iron, cobalt and nickel nitride thin films Open
A prototype in situ X-ray absorption near-edge structure (XANES) system was developed to explore its sensitivity for ultra-thin films of iron-nitride (Fe-N), cobalt-nitride (Co-N) and nickel-nitride (Ni-N). They were grown using DC-magnetr…
High mobility transparent and conducting oxide films of La-doped SrSnO3 Open
The synthesis and characterization of high mobility thin films of La-doped SrSnO 3 are reported. The mobility for the 7% La-doped sample is found to be 228 cm 2 V -1 s -1 . The observed high mobility is associated with the reduced carrier …
View article: Effects of swift heavy ion-irradiation on magnetic properties of Co-doped TiO2
Effects of swift heavy ion-irradiation on magnetic properties of Co-doped TiO2 Open
Ferromagnetic Co-doped TiO2 thin films at room temperature have been synthesized by RF sputtering and ion-irradiated with 100 MeV Au ions. The surface roughness of the film increases with increasing Au-ion fluence. Kerr microscopy measurem…
Tailoring the magnetic states by controlling octahedral cation arrangement in double perovskite Open
The predictability of any characteristic functional aspect in a double perovskite (DP) system has always been compromised by its strong dependence over the inevitably present anti-site disorders (ASD). Here, we aim to precisely map the qua…
Enhanced photocatalytic activity of N, P, co-doped carbon quantum dots: An insight from experimental and computational approach Open
Herein, we demonstrate the single-step microwave radiation assisted approach to develop Nitrogen (N) and Phosphorous (P) co-doped carbon quantum dots (NP-CQD). The developed NP-CQD showed enhancement in visible light photocatalytic activit…
Structural, optical and electronic properties of Ni<sub>1−x</sub>Co<sub>x</sub>O in the complete composition range Open
The optical gap of Ni1−xCoxO solid solutions neither varies linearly with Co composition nor shows any bowing in the complete composition range. The nature of this variation of the gap is governed by the position of conduction band edge.
View article: Insight into the photophysics of strong dual emission (blue & green) producing graphene quantum dot clusters and their application towards selective and sensitive detection of trace level Fe<sup>3+</sup> and Cr<sup>6+</sup> ions
Insight into the photophysics of strong dual emission (blue & green) producing graphene quantum dot clusters and their application towards selective and sensitive detection of trace level Fe<sup>3+</sup> and Cr<sup>6+</sup> ions Open
Schematic representation for the origin of blue and green emissions, and the resultant PL emission spectra from the GQD interconnected cluster-type sample.
Structural correlation of a nanoparticle-embedded mesoporous CoTiO<sub>3</sub> perovskite for an efficient electrochemical supercapacitor Open
Interconnecting nanoparticle embedded mesoporous CTO rods (left panel), offered a significantly larger diffusion of OH− ions deep inside the rod structure and delivered a stable electrochemical performance with a specific capacitance of 60…
Tuning the Magnetic Ground State by Charge Transfer Energy in SrCoO2.5 via Strain Engineering Open
SrCoO2.5 (SCO) is a charge transfer insulator with 3d6 ground state configuration leading to antiferromagnetic nature. It is observed that substrate induced strain engineering modifies the ground state of SCO thin film with 3d7L (L:O-2p ho…
Magnetism and structure of in-situ grown FeN films studied using N K-edge XAS and nuclear resonance scattering Open
We studied the structural and magnetic properties of \textit{in-situ} grown iron mononitride (FeN) thin films. Initial stages of film growth were trapped utilizing synchrotron based soft x-ray absorption near edge spectroscopy (XANES) at t…
Role of local short-scale correlations in the mechanism of negative magnetization Open
We elaborate here why the antiferromagnetically ordered GdCrO$_3$ responds in\na diamagnetic way under certain conditions, by monitoring the evolution of the\nmicroscopic global and local magnetic phases. Using high energy $\\sim$ 0.3 eV\n…
Finding pathways for stoichiometric Co4N thin films Open
In this work, we studied the pathways for formation of stoichiometric \tcn~thin films. Polycrystalline and epitaxial \tcn~films were prepared using reactive direct current magnetron (dcMS) sputtering technique. A systematic variation in th…
Hexagonal Sr0.6Ba0.4MnO3 Room Temperature Magneto-electric: Field Tunable Tunneling State and Entangled Pseudospin Clusters Open
Hexagonal Sr0.6Ba0.4MnO3 undergoes ferroelectric (FE) and antiferromagnetic (AFM) orderings having competing energetics within a narrow range close to the room temperature. Magnetic properties appear to be governed by intricate exchange in…
Electronic Structure of Visible Light-Driven Photocatalyst δ-Bi<sub>11</sub>VO<sub>19</sub> Nanoparticles Synthesized by Thermal Plasma Open
Size confinement for tailoring of electronic structures can in principle be explored for enhancement of photocatalytic properties. In the present work, vanadium-doped bismuth oxide nanoparticles, with an average particle size of 36 nm, are…
Role of local short-scale correlations in the mechanism of pseudo-diamagnetism Open
We elaborate here why the antiferromagnetically ordered GdCrO$_3$ responses in diamagnetic way under certain conditions, by monitoring the evolution of microscopic global and local magnetic phases. Using high energy E $\sim$ 0.3 eV neutron…
Density and Microstructure of Amorphous Carbon Thin Films Open
In this work, we studied amorphous carbon ($a$-C) thin films deposited using direct current (dc) and high power impulse magnetron sputtering (HiPIMS) techniques. The microstructure and electronic properties reveal subtle differences in $a$…
Structural, Electrical, and Magnetic Properties of La2Ni1.5Mn0.5O6 double perovskites Open
Among multifunctional double perovskite oxides, La2NiMnO6 has recently drawn significant attention due to its importance both in terms of understanding of fundamental physics and potential for device applications. The relative alteration i…
Role of compensating Li/Fe incorporation in Cu<sub>0.945</sub>Fe<sub>0.055−x</sub>Li<sub>x</sub>O: structural, vibrational and magnetic properties Open
Monoclinic single phase Cu0.945Fe0.055−xLixO, with Cu2+ properly substituted by Fe3+ and Li1+, shows enhanced magnetic moment with stronger FM coupling due to Li1+ doping.