A5025286206- Magnetic and transport properties of perovskites and related materials
- Advanced Condensed Matter Physics
- Physics of Superconductivity and Magnetism
- Electronic and Structural Properties of Oxides
- Rare-earth and actinide compounds
- High Entropy Alloys Studies
- Magnetic properties of thin films
- Shape Memory Alloy Transformations
- Magnetic Properties of Alloys
- Muon and positron interactions and applications
- Chalcogenide Semiconductor Thin Films
- Multiferroics and related materials
- Electrocatalysts for Energy Conversion
- Superconductivity in MgB2 and Alloys
- Semiconductor materials and devices
- Advancements in Battery Materials
- High-Temperature Coating Behaviors
- Iron-based superconductors research
- Ferroelectric and Piezoelectric Materials
- Titanium Alloys Microstructure and Properties
- Ferroelectric and Negative Capacitance Devices
- Theoretical and Computational Physics
- Advanced Memory and Neural Computing
- Copper-based nanomaterials and applications
- Advanced NMR Techniques and Applications
American University of Sharjah
2014-2025
Institut polytechnique de Grenoble
2016
University of Cambridge
2010-2016
Luxembourg Institute of Science and Technology
2016
CEA Grenoble
2016
CEA LETI
2016
University of Alberta
2005-2015
Hebrew University of Jerusalem
2012
Rutherford Appleton Laboratory
2008
University of Oxford
2008
The Meissner effect, which explains the levitation of magnetic objects, involves expulsion external flux from a superconductor. Now, researchers show that inverse effect can also occur in is amplified.
We use calorimetry to identify pressure-driven isothermal entropy changes in ceramic samples of the prototypical ferroelectric BaTiO3. Near structural phase transitions at ∼400 K (cubic-tetragonal) and ∼280 (tetragonal-orthorhombic), inverse barocaloric response differs sign magnitude from corresponding conventional electrocaloric response. The differences arise due decrease unit-cell volume on heating through transitions, whereas large volumetric thermal expansion either side transitions.
We have summarized some important results of the anisotropic transport properties prototypical manganite La 1-x Ca x MnO 3 as well a few others. The temperature dependence magnetoresistance in manganites exhibits peak near magnetic ordering which differs dramatically from ones 3d ferromagnetic metals and alloys. Depending on strain-driven orbital state, AMR could be enhanced dramatically. is much larger than metals, where its magnitude only order percent. At low fields (below kG) intrinsic...
Scanning tunneling spectroscopy measurements performed on La${}_{0.7}$Ca${}_{0.3}$Mn${}_{3}$O (LCMO) films epitaxially grown Pr${}_{1.85}$Ce${}_{0.15}$CuO${}_{4}$ (PCCO) reveal localized penetration of superconductivity into the LCMO up to distances much larger than is possible for Cooper pairs in a singlet spin state exist. This long-range proximity effect manifested spectra as gaps and, less abundantly, zero-bias conductance peaks (ZBCPs). Since ZBCPs were not found bare PCCO films, their...
The ever-growing interest in additive manufacturing (AM) is evidenced by its extensive utilisation to manufacture a broad spectrum of products across range industries such as defence, medical, aerospace, automotive, and electronics. Today, most laser-based AM carried out employing continuous-wave (CW) long-pulsed lasers. CW lasers have the downside that thermal energy imparted laser diffuses around irradiated spot often leads creation heat-affected zones (HAZs). Heat-affected may degrade...
Developing nonprecious metal-based electrocatalysts with outstanding performance has been the focal point of scientific community for past decade. Multiprinciple element medium- and high-entropy alloys have recently known to exhibit a range superior mechanical, physical, electrocatalytic, anticorrosive properties, which are traditional alloys. In this study, electrocatalytic properties equiatomic single-phase medium-entropy alloy electrodes compositions CoNiCr, CoNiV, CoNi(Cr/V) investigated...
Conventional spin-singlet Cooper pairs convert into spin-triplet in ferromagnetic Josephson junctions which the superconductor/ferromagnet interfaces (S/F) are magnetically inhomogeneous. Although much of theoretical work describing this triplet proximity effect has considered ideal with magnetic domain walls (DW) at interfaces, practice it is not easily possible to isolate a DW and propagate supercurrent through it. The rare-earth magnet Gd can form field-tuneable in-plane Bloch if grown...
In this work, the corrosion resistance of mild steel surface nanostructured with a femtosecond laser and coated high resistant CrCoNi (CCN) medium entropy alloy through magnetron sputtering is studied. Substantial improvement in protection was achieved by applying combination high-power nano-structuring at ambient conditions thin-film coating alloy. XRD analysis revealed that structuring increases susceptibility surfaces to Fe2O3 nucleation oxidation. The wettability measurements...
CoNiCr is a prototypical example of topical multi-principle element alloys with superior cryogenic and high-temperature mechanical strength, corrosion, oxidation resistance, yet-to-be-explored magnetic electronic functionalities. The remarkable properties this transition metal ternary system are not only due to atomic radii, configurational mismatch, volume misfit but also dependent on the debated magnetically driven chemical short-range order. current study focuses electric single-phase...
A nanocomposite (NC) of titanium (IV) oxide (TiO2) and molybdenum (VI) (MoO3) was synthesized using a hydrothermal route. Detailed analyses transmission electron microscopy, X-ray diffraction, fluorescence (XRF), Brunauer–Emmett–Teller (BET) isotherms, photoelectron spectroscopy, Raman, diffuse reflectance infrared Fourier transform spectroscopy were carried out confirmed the successful formation pure TiO2-MoO3 (Ti-Mo) NC. The Ti-Mo NC possesses sizes in range 150–500 nm. XPS, DRIFT shift...
The authors investigated the anisotropic magnetoresistance (AMR) in ultrathin La-based manganite films grown on various substrates. It was found that depending strain state, AMR some of these systems exceeds 100% and can even change sign. These changes are very dramatic when compared to few percent conventional ferromagnets. mechanism behind large is discussed.
Long-ranged superconductor proximity effects recently found in superconductor-ferromagnetic (S-F) systems are generally attributed to the formation of triplet-pairing correlations due various forms magnetic inhomogeneities at S-F interface. In order investigate this conjecture within a single F layer coupled superconductor, we performed scanning tunneling spectroscopy on bilayers La${}_{2/3}$Ca${}_{1/3}$MnO${}_{3}$ (LCMO) ferromagnetic thin films grown high-temperature superconducting...
Four‐dimensional printing has revolutionized traditional three‐dimensional (3D printing) by using smart materials such as shape memory polymers (SMPs). As nonmagnetic materials, SMPs require direct exposure to heat for the effect be triggered. This limitation can addressed incorporating magnetic nanoparticles, allowing SMP/nanocomposite remotely heated through induction heating. work focuses on (LSMO) manganite with an optimized stoichiometry of x = 0.3. Polycrystalline LSMO is sintered from...
In this study, the electrocatalytic properties of single-phase face-centered cubic high entropy alloy electrodes with equiatomic compositions CoNiFeCr, CoNiFeV, and CoNiFe(Cr/V) are explored for hydrogen evolution reaction (HER) in 1M KOH 0.5M H2SO4. Among these, High Entropy Alloy (HEA) exhibited superior performance, achieving overpotentials 277 45 mV (vs reference electrode) at 10 mA/cm2 alkaline acidic media, respectively, surpassing their counterparts approaching efficiency commercial...
Magnetotransport properties of strained La0.65Ca0.35MnO3 thin films with thickness between 10 and 1000nm were investigated at temperatures near the metal-insulator transition in magnetic fields up to 0.7Tesla. The reduction film thickness, which turn produces an increasing epitaxial lattice strain, dramatically increases “in-plane” anisotropy magnetoresistivity.
The effects of the grain-boundary-induced lattice disorder on resistivity, magnetization, and specific heat a prototypical manganite Sm0.55Sr0.45MnO3 near half doping were investigated at temperatures metal-insulator transition. An increasing softens magnetic phase transition from first order into second Furthermore, peaks in resistivity are broaden there is an increase charge-carrier scattering rates metallic insulating states. origin these phenomena discussed.
In order to study the fundamental conduction mechanism of LaAlO3/SrTiO3 (LAO/STO) interfaces, heterostructures were modified with a single unit cell interface layer either an isovalent titanate ATiO3 (A = Ca, Sr, Sn, Ba) or rare earth Sr0.5RE0.5TiO3 (RE La, Nd, Sm, Dy) between LAO and STO. A strong coupling lattice strain induced in by interfacial layers sheet carrier density STO substrate is observed. The observed crystal distortion large it suggested that couples into sub-surface STO,...
Abstract A prototypical, single-phase, and non-equiatomic high entropy alloy Fe 40 Mn Co 10 Cr has been mechanically deformed at room cryogenic temperatures. Plastic deformation was accommodated via crystallographic slip temperature while transformation induced plasticity (TRIP) observed in samples 77 K. The stress-induced martensitic occurred from face-centered cubic (FCC) to hexagonal close-packed (HCP) structures. detailed electron backscatter diffraction analysis utilized detect phase...