Results 31 to 40 of about 25,986 (177)

Study of the Effect of Quenching on Microstructural and Magnetic Properties of Cu-Doped Mg-Ferrite

Advances in Condensed Matter Physics, 2022
Mg1-xCuxFe2O4 (x = 0.0–0.5) was prepared by the double sintering ceramic method, which sintered at 1100°C and 1200°C for 3 hours and investigated for structural, microstructural, and magnetic properties as a function of the Cu content and cooling process.
Apurba Poddar, Suman Halder, S.I. Liba, Sheikh Manjura Hoque, Shibendra Shekher Sikder   +4 more
doaj   +1 more source

Iron Catalyzed Aryl–Aryl Kumada Cross‐Coupling: A Mechanistic and Computational Investigation

Angewandte Chemie, EarlyView.
Despite intense interest, the mechanism of iron‐catalyzed aryl–aryl cross‐coupling remains poorly understood. Combining Mössbauer spectroscopy, kinetics analysis, and DFT computations these studies reveal a novel Fe(I)/Fe(II)/Fe(III) catalytic for aryl–aryl cross‐coupling mediated by an Fe(II) PCNHCP Pincer complex. These findings close a key knowledge
Jatin Panda, Magali Gimeno, Amrita Gogoi, Zeqing Chen, Subhash Garhwal, Laura Levy, Alexander Kaushansky, Natalia Fridman, Jos Briggs‐Pritchard, Renana Gershoni‐Poranne, Michael L. Neidig, Graham de Ruiter   +11 more
wiley   +2 more sources

Mössbauer Spectroscopy as a Valuable Analysis Technique in Biomedical Research

CHIMIA
Mössbauer spectroscopy is an effective technique used to examine the iron atom electronic environments in both biomolecular molecules and whole animal studies. Because of its sensitivity to nuclear hyperfine interactions, this technique yields incredibly
Jasim Hassen, Jack Silver
doaj   +1 more source

Redox-Mediated Electrochemical Regeneration of Spent LiFePO₄ Battery Cathodes. [PDF]

Angew Chem Int Ed Engl
This work demonstrates a redox‐mediated electrochemical method for direct recycling of spent LiFePO4 battery cathodes. A water‐soluble mediator, iron propylenediamine tetraacetate (Fe‐PDTA), transports electrons into an off‐electrode reservoir where it drives compositional and structural repair of degraded LiFePO4.
Roh DH, Jung D, Gerken JB, Martinez JJ, Kazyak E, Stahl SS.   +5 more
europepmc   +2 more sources

Iron and molybdenum valences in double-perovskite (Sr,Nd)2FeMoO6: electron-doping effect

, 2003
Double perovskite, (Sr1-xNdx)2FeMoO6, was doped with electrons through partial substitution of divalent Sr by trivalent Nd (0 < x < 0.2). The Fe valence and the degree of B-site order were probed by 57Fe Mossbauer spectroscopy.
Chmaissem, Dass, Greneche, H. Yamauchi, Izumi, J. Lindén, Karppinen, Kobayashi, Lindén, Lindén, Lindén, M. Karppinen, Navarro, Navarro, T. Motohashi, T. Shimada, Yamamoto   +16 more
core   +1 more source

57Fe Mössbauer spectroscopy investigation of La0.7Ca0.3Mn0.5Fe0.5O3

Results in Physics, 2016
A La0.7Ca0.3Mn0.5Fe0.5O3 (LCMFO) ceramic sample was produced using conventional solid-state reactions. According to the X-ray diffraction data, the obtained sample has an orthorhombic space group Pnma (a = 5.482(2) Å, b = 7.739(3) Å, c = 5.446(3) Å ...
V.S. Zakhvalinskii, E.A. Piliuk, S.V. Taran, A. Sklyarova, V.V. Matveev, J. Lindén, I. Zakharchuk   +6 more
doaj   +1 more source

Elucidating the structural composition of a Fe-N-C catalyst by nuclear and electron resonance techniques [PDF]

, 2019
Fe–N–C catalysts are very promising materials for fuel cells and metal–air batteries. This work gives fundamental insights into the structural composition of an Fe–N–C catalyst and highlights the importance of an in‐depth characterization.
Auerbach, H., Behrends, J., Kramm, U. I., Kübel, C., Martinaiou, I., Schünemann, V., Sergeev, I., Shyam Kumar, C. N., Tait, C. E., Wagner, S., Wille, H. C., Wolny, J. A.   +11 more
core   +1 more source

Emergent Spin‐Glass Behavior in an Iron(II)‐Based Metal–Organic Framework Glass

Advanced Functional Materials, EarlyView.
A one‐pot, solvent‐free synthesis yields an Fe2+‐based metal‐organic framework (MOF) glass featuring a continuous random network structure. The material exhibits spin‐glass freezing at 14 K, driven by topological‐disorder and short‐range magnetic frustration, showcasing the potential of MOF glasses as a plattform for cooperative magnetic phenomena in ...
Chinmoy Das, Soma Salamon, Joachim Landers, Jan‐Benedikt Weiß, Wen‐Long Xue, Pascal Kolodzeiski, Roman Pallach, Heiko Wende, Sebastian Henke   +8 more
wiley   +1 more source

Synchrotron Mössbauer spectroscopic study of ferropericlase at high pressures and temperatures [PDF]

, 2009
The electronic spin state of Fe^(2+) in ferropericlase, (Mg_(0.75)Fe_(0.25))O, transitions from a high-spin (spin unpaired) to low-spin (spin paired) state within the Earth’s mid-lower mantle region.
Gavriliuk, Alexander. G., Hu, Michael Y., Jacobsen, Steven D., Lerche, Michael, Lin, Jung-Fu, Sturhahn, Wolfgang, Zhao, Jiyong   +6 more
core  

Paramagnetic Phase of a Heavy-Fermion Compound, CeFePO, Probed by 57Fe M\"{o}ssbauer Spectroscopy

, 2012
57Fe M\"{o}ssbauer spectroscopy was applied to an iron-based layered compound CeFePO. At temperatures from 9.4 to 293 K, no magnetic splitting was observed in the M\"ossbauer spectra of CeFePO indicating a paramagnetic phase of the Fe magnetic sublattice.
Brüning E. M., Kamihara Y., Kamihara Y., Kamihara Y., Kamihara Y., Kamihara Y., Kamihara Y., Kamihara Y., Kitagawa S., Kitao S., Lee C. H., McGuire M. A., McQueen T. M., Tegel M., Vildosola V., Walker L. R., Wertheim G. K., Zhao J.   +17 more
core   +1 more source