Results 41 to 50 of about 32,026 (209)

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

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

Metalliferous Biosignatures for Deep Subsurface Microbial Activity [PDF]

, 2015
Acknowledgments We thank the British Geological Survey (BGS) for the provision of samples and the Science & Technology Facilities Council (STFC) grant (ST/L001233/1) for PhD funding which aided this project.
Bowden, Stephen, Brolly, Connor, Parnell, John, Spinks, Sam   +3 more
core   +1 more source

High‐Yield Synthesis of Fe‐NC Electrocatalysts Using Mg2+ Templating and Schiff‐Base Porous Organic Polymers

Advanced Functional Materials, EarlyView.
Fe─NC porous oxygen reduction electrocatalysts are prepared employing a 2,4,6‐Triaminopyrimidine‐based porous organic polymer, a Mg2+ Lewis acid, and a low‐temperature cation exchange protocol. Using the polymer precursor achieves high pyrolysis yields and results in atomically dispersed FeNx sites. The resulting catalysts feature hierarchical porosity
Eliot Petitdemange, Jinjie Zhu, Angus Pedersen, Joseph Parker, S. Esmael Balaghi, Shaohua Li, Silvia Favero, José Ignacio Martínez, Sarah Haigh, Maria‐Magdalena Titirici, Anna Fischer, Jesús Barrio   +11 more
wiley   +1 more source

Enhanced Nitric Oxide Electroreduction to Ammonia via Modulating Spin‐Polarization of Fe Single‐Atom Catalysts

Advanced Functional Materials, EarlyView.
A strategic spin‐polarization suppression in Fe single‐atom catalysts is proposed to enhance electrocatalytic reduction of NO to NH3. Employing a top‐down electrospinning strategy, self‐supported FeSAC with Fe‐N3S1 coordination structure and spin‐state transition is engineered from high‐spin to low‐spin.
Jialing Song, Ziqi Wei, Lupeng Han, Zhenlin Wang, Chenghao Fan, Donglin Han, Chunwei Dong, Haiyan Duan, Xiyang Wang, Sam Fong Yau Li, Eslam Hamed, Ming Xie, Emiliano Cortés, Dengsong Zhang   +13 more
wiley   +1 more source

Mössbauer spectroscopy of sulphidic minerals [PDF]

Acta Montanistica Slovaca, 2000
Principles of the Mössbauer effect and the possibilities of its utilization for the study of sulphidic minerals are discussed. There is possibility to apply the Mössbauer spectroscopy in mineralogy for the identification of sulphides („fingerprint ...
Lipka Jozef, BalហPeter
doaj  

Novel neutral iron(II) isocyanide maleonitrile dithiolate [Fe(S2C2(CN)2)(t-BuNC) 4] compound

Química Nova, 2004
FeBr2 reacts with the S2C2(CN)2(2-) ion (1:1 ratio) in the presence of an excess of t-BuNC in THF to give the mixed ligand [Fe(S2C2(CN)2)(t-BuNC) 4] compound.
Milton K. Morigaki, Elias M. da Silva, Carlos V. P. de Melo, Carlos Larica, Armando Biondo, Jair C. C. Freitas, Gilson H. M. Dias, Holgadinei R. Ribeiro   +7 more
doaj   +1 more source

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

An Advanced High‐Performance Ultrafast Ammonium‐Ion Aqueous Battery Based on Dual‐Metal Redox Open Framework Molecular Magnet

Advanced Science, EarlyView.
The Prussian Blue Analogue molecular magnet KMnFeHCF is demonstrated as a high‐performance cathode for ultra‐fast aqueous ammonium‐ion batteries. A full cell using KMnFeHCF and graphite delivers ~71 mAh g−1 at 1.25 A g−1 and ~51 mAh g−1 at 2.2 A g−1, retaining 50% capacity after 1850 cycles. Its scalability, cycling stability, and low cost offer strong
Nilasha Maiti, Pramod Bhatt, Manoj K Sharma, Sher Singh Meena, Mayuresh D Mukadam, Soumen Samanta   +5 more
wiley   +1 more source