A thorough understanding of the complex redox coupling among manganese, arsenic, sulfur and oxygen in subsurface environments is still obscured by their metastable intermediate valances and speciation. Arsenic sulfide minerals may be disturbed by natural or anthropogenic activities, and encounter oxidants such as oxygen and reactive trivalent Mn sp...
This work presents the design, fabrication, characterization and ultimately the optimization of single layer magnetic field sensors based on the anisotropic magnetoresistance (AMR) effect present in La2/3Sr1/3MnO3 (LSMO) thin films. The magnetic and electrical properties of this manganite oxide are linked through the double exchange mechanism. Than...
Published in Hyperfine Interactions
GdFexMn1-xO3 (x = 0.0, 0.1, 0.3, 0.5, 0.7, 0.9 and 1.0) nanoparticle series was synthesised using sol–gel auto-combustion technique. Rietveld refinement of x-ray diffraction (XRD) patterns revealed that all samples are crystallized in a single phase with (Pnma) space group No.62. The FC–ZFC measurements showed an increase in the antiferromagnetic (...
Published in Environmental pollution (Barking, Essex : 1987)
In this paper, the degradation of three endocrine-disrupting chemicals (EDCs): bisphenol A (BPA), 17β-estradiol (E2) and 17α-ethinylestradiol (EE2) by manganite (γ-MnOOH) activated peroxymonosulfate (PMS) was investigated. Preliminary optimisation experiments showed that complete degradation of the three EDCs was achieved after 30 min of reaction u...
Published in Bulletin of Materials Science
In this study, we have tried to simulate both temperature and magnetic field dependence of electrical resistivity for polycrystalline La0.75Ho0.05Sr0.2MnO3. The studied sample was elaborated by sol–gel method. The energy-dispersive X-ray confirms the presence of Ho element. The temperature dependence of resistivity in the whole temperature range (1...
Published in Applied Physics A
In the present communication, the composition of barium and zirconium modified YMnO3 ceramic, i.e. Y0.95Ba0.05Mn0.95Zr0.05O3, has been synthesized using the solid-state reaction method, and emphasis has been made to observe the variations on structural, optical, electrical, and ferroelectric properties of the prepared ceramic. The primary structura...
Published in Applied Physics A
Impact of hydrogenation on the structural, dielectric and magnetic properties of half-doped La0.5Ca0.5MnO3 manganate have been investigated. Polycrystalline sample of La0.5Ca0.5MnO3 was prepared through solid state reaction at ~ 1300 °C. Subsequently, the prepared sample was annealed at 600 °C for 6 h in a continuous flow of hydrogen gas in a tubul...
Published in Applied Physics A
Evolution of the competing multiphase magnetic and charge orders in terms of the variance σ2 in the A-site cationic mismatch and Pr content (x) and their consequences on the magnetotransport in La0.60-xPrxCa0.40MnO3 (x = 0.30, 0.35, 0.40, 0.45) are reported. The coexistence of vivid electronic orders like ferromagnetism, antiferromagnetism, and cha...
International audience
Published in Applied Physics A
Efficient solid-state refrigeration techniques have drawn increasing attention due to their potential for improving energy efficiency of refrigeration temperature control systems without using harmful gas as in conventional gas compression techniques. Research on magnetocaloric lanthanum manganites with a large maximum magnetic entropy change near ...
