Academic literature on the topic 'SrFeO'
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Journal articles on the topic "SrFeO"
Katayama, T., A. Chikamatsu, Y. Hirose, R. Takagi, H. Kamisaka, T. Fukumura, and T. Hasegawa. "Topotactic fluorination of strontium iron oxide thin films using polyvinylidene fluoride." J. Mater. Chem. C 2, no. 27 (2014): 5350–56. http://dx.doi.org/10.1039/c4tc00558a.
Full textXu, Kun, Youdi Gu, Cheng Song, Xiaoyan Zhong, and Jing Zhu. "Atomic insight into spin, charge and lattice modulations at SrFeO3−x/SrTiO3 interfaces." Nanoscale 13, no. 12 (2021): 6066–75. http://dx.doi.org/10.1039/d0nr07697j.
Full textKrzystowczyk, Emily, Xijun Wang, Jian Dou, Vasudev Haribal, and Fanxing Li. "Substituted SrFeO3 as robust oxygen sorbents for thermochemical air separation: correlating redox performance with compositional and structural properties." Physical Chemistry Chemical Physics 22, no. 16 (2020): 8924–32. http://dx.doi.org/10.1039/d0cp00275e.
Full textHeifets, Eugene, Eugene A. Kotomin, Alexander A. Bagaturyants, and Joachim Maier. "Thermodynamic stability of non-stoichiometric SrFeO3−δ: a hybrid DFT study." Physical Chemistry Chemical Physics 21, no. 7 (2019): 3918–31. http://dx.doi.org/10.1039/c8cp07117a.
Full textBulfin, B., J. Vieten, S. Richter, J. M. Naik, G. R. Patzke, M. Roeb, C. Sattler, and A. Steinfeld. "Isothermal relaxation kinetics for the reduction and oxidation of SrFeO3 based perovskites." Physical Chemistry Chemical Physics 22, no. 4 (2020): 2466–74. http://dx.doi.org/10.1039/c9cp05771d.
Full textChikamatsu, Akira, Yusuke Suzuki, Takahiro Maruyama, Tomoya Onozuka, Tsukasa Katayama, Daisuke Ogawa, and Tetsuya Hasegawa. "Selective fluorination of perovskite iron oxide/ruthenium oxide heterostructures via a topotactic reaction." Chemical Communications 55, no. 17 (2019): 2437–40. http://dx.doi.org/10.1039/c8cc09443h.
Full textMatsubayashi, Yasuhito, Junichi Nomoto, Iwao Yamaguchi, and Tetsuo Tsuchiya. "Control of the oxygen deficiency and work function of SrFeO3−δ thin films by excimer laser-assisted metal organic decomposition." CrystEngComm 22, no. 28 (2020): 4685–91. http://dx.doi.org/10.1039/d0ce00442a.
Full textdos Santos-Gómez, L., J. M. Porras-Vázquez, E. R. Losilla, and D. Marrero-López. "Ti-doped SrFeO3 nanostructured electrodes for symmetric solid oxide fuel cells." RSC Advances 5, no. 130 (2015): 107889–95. http://dx.doi.org/10.1039/c5ra23771h.
Full textLuongo, Giancarlo, Felix Donat, and Christoph R. Müller. "Structural and thermodynamic study of Ca A- or Co B-site substituted SrFeO3−δ perovskites for low temperature chemical looping applications." Physical Chemistry Chemical Physics 22, no. 17 (2020): 9272–82. http://dx.doi.org/10.1039/d0cp01049a.
Full textYao, Shukai, Pilsun Yoo, and Peilin Liao. "A computational study of hydrogen doping induced metal-to-insulator transition in CaFeO3, SrFeO3, BaFeO3 and SmMnO3." Physical Chemistry Chemical Physics 21, no. 45 (2019): 25397–405. http://dx.doi.org/10.1039/c9cp04669k.
Full textDissertations / Theses on the topic "SrFeO"
Kleveland, Kjersti. "Preparation, microstructure and mechanical properties of LaCoO₃ and SrFeO₃ based ceramics." Doctoral thesis, Norwegian University of Science and Technology, Department of Chemistry, 2000. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-1931.
Full textGlenne, Rita. "Preparation and Transport Properties of SrFeO. Based Materials with controlled Microstructure." Doctoral thesis, Norwegian University of Science and Technology, Department of Chemistry, 2001. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-463.
Full textThis work consists of mainly two parts. The first part deals with the sintering behaviour and the microstructural stability of SrFe1-xCrxO3-δ, and the second with transport properties of membranes of the same compositions. The most important experimental tools have been dilatometry and oxygen permeability measurements. Supplementary tools were x-ray diffraction analysis (XRD), scanning electron microscope (SEM) and particle size distribution analysis.
Schmidt, Marek Wojciech, and Marek Schmidt@rl ac uk. "Phase formation and structural transformation of strontium ferrite SrFeOx." The Australian National University. Research School of Physical Sciences and Engineering, 2001. http://thesis.anu.edu.au./public/adt-ANU20020708.190055.
Full textRizki, Youssef. "Structure et propriétés physiques d’oxydes de fer à valence mixte SrFe1-x(Sc,Sn)xO3-d." Rouen, 2011. http://www.theses.fr/2011ROUES048.
Full textIn this thesis, the relationship between structure and physical properties of new transition-metal oxides of the SrFe1-x(Sc,Sn)xO3-d (M = Sc, Sn) type has been investigated. The structural characterization was performed by X-ray diffraction and transmission electron microscopy. Mössbauer spectrometry has been used to investigate both the oxidation state of iron and its local environment. The physical properties of the compounds were characterized by resistivity measurements with and without applied magnetic field, magnetic susceptibility measurements, magnetization measurements as a function of magnetic field or temperature. The substitution of iron by a nonmagnetic trivalent ion such as Sc3+ leads to a decrease in the oxygen content without affecting the crystalline structure of the compound. However, the substitution is limited and the SrFe0,5Sc0,5O2,5 limit compound can also be chemically synthesized in a brownmillerite ordered structure. Although transport and magnetic properties are strongly affected by such substitution, magnetoresistivity is not significantly altered. The substitution of iron by a tetravalent ion such as Sn4+ cannot maintain constant oxygen content, which increases with the substitution rate. Substitution is not limited, and a structural change is observed for a substitution rate higher than 0. 5. All the physical properties investigated (transport, magnetism, magnetoresistivity) are significantly influenced by the substitution
Hernandez, José Luis Valenzuela. "Obtenção e caracterização de filmes de perovskitas do tipo SrFeO3≠” para uso em spintrônica baseada em seleção aumentada de spins." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2018. http://hdl.handle.net/10183/184662.
Full textInspired by results that showed great ability of chiral systems to select spins in electronic transport, we produced films of SrFeO3− perovskite-type oxides that present helical magnetic structure. We used a chemical method starting from Fe(NO3)3.9H2O, SrCO3 and citric acid as precursors. Due to the complexity of production, the manufacturing route has been extensively explored and described. Electronic transport measurements were made by applying currents with controlled frequencies to the deposited film. Two transport mechanisms were found. Apparently they depend on the thickness of the sample, with a possible transition near 700 nm. The transport mechanism for temperatures above the magnetic transition is more sensitive to both frequency and temperature. On the other hand, two transitions attributed to magnetic phases were found around the temperatures of 105 K and 135 K. The temperatures coincide with the transitions corresponding to the helical magnetic transition. Through the use of the Mott and small Polarons models we can determine two magnetic phases separated by a transition (crossover) that is possibly antiferromagnetic. It is concluded that films of the perovskite that present transactions corresponding to those reported as helical, were manufactured successfully.
Li, Jianlin. "SrCeO₃₋based protonic conductors for hydrogen production and separation by water gas shift, steam reforming, and carbon dioxide reforming reactions." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0024942.
Full textMaity, Avishek. "Etude des mécanismes de diffusion de l’oxygène dans SrFeO3-x et Pr2NiO4+d, réalisée par diffraction du rayonnement synchrotron in situ sur monocristal." Thesis, Montpellier, 2016. http://www.theses.fr/2016MONTT188/document.
Full textUnderstanding fundamental aspects of oxygen diffusion in solid oxides at moderate temperatures, down to ambient, is an important issue for the development of a variety of technological devices in the near future. This concerns e.g. the progress and invention of next generation solid oxygen ion electrolytes and oxygen electrodes for solid oxide fuel cells (SOFC) as well as membrane based air separators, oxygen sensors and catalytic converters to transform e.g. NOx or CO from exhaust emissions into N2 and CO2. On the other hand oxygen intercalation reactions carried out at low temperatures present a powerful tool to control hole doping, i.e. the oxygen stoichiometry, in electronically correlated transition metal oxides. In this aspect oxides with Brownmillerite (A2BB’O5) and K2NiF4-type frameworks, have attracted much attention, as they surprisingly show oxygen mobility down to ambient temperature. In this thesis we investigated oxygen intercalation mechanisms in SrFeO2.5+x as well as Pr2NiO4+x by in situ diffraction methods, carried out on single crystals in especially designed electrochemical cell, mainly exploring synchrotron radiation. Following up oxygen intercalation reactions on single crystals is challenging, as it allows to scan the whole reciprocal lattice, enabling to obtain valuable information as diffuse scattering, weak superstructure reflections, as well as information of the volume fraction of different domains during the reaction, to highlight a few examples, difficult or impossible to access by powder diffraction. Both title systems are able to take up an important amount of oxygen on regular and interstitial lattice sites, inducing structural changes accompanied by long range oxygen ordering. For SrFeO2.5+x the uptake of oxygen carried out by electrochemical oxidation yields SrFeO3 as the final reaction product. The as grown SrFeO2.5 single crystals we found to show a complex defect structure, related to the stacking disorder of the octahedral and tetrahedral layers. During the oxygen intercalation we evidenced the formation of two reaction intermediates, SrFeO2.75 and SrFeO2.875, showing complex and instantly formed long range oxygen vacancies. Due to the specific twinning with up to totally twelve possible twin individuals, we directly follow up the formation and changes of the specific domain and related micro-structure. We thus observed a topotactic reaction mechanism from SrFeO2.5 to SrFeO2.75, while further oxidation lead to important rearrangements in the dimensionality of the oxygen defects in SrFeO2.75, implying the formation of an additional twin domain in course of the reaction. The electrochemical reduction of orthorhombic Pr2NiO4.25 yields stoichiometric Pr2NiO4.0 as the final reaction product with the same symmetry, while tetragonal Pr2NiO~4.12 appears as a non-stoichiometric intermediate phase. Using a single crystal with 50µm diameter, the reaction proceeded under equilibrium conditions in slightly less than 24h, implying an unusually high oxygen ion diffusion coefficient of > 10^-11cm2*s-1 at already ambient temperature. From the changes of the associated twin domain structure during the reduction reaction, the formation of macro twin domains was evidenced. Heating up Pr2NiO4.25 single crystals in air revealed a complex series of phase transition, evidencing the true symmetry of the starting phase to be in fact monoclinic. Beside exploring the complex phase diagrams of SrFeO2.5+x and Pr2NiO4+d we were able to investigate detailed changes in the micro-structure using in situ single crystal diffraction techniques, impossible to access by classical powder diffraction methods. The importance of changes in the domain structure goes far beyond the investigated title compounds and has utmost importance of the performance, stability and lifetime of e.g. battery materials
Karim, Abid [Verfasser], and Christine A. [Akademischer Betreuer] Kuntscher. "Electronic correlations in SrFe2-xCoxAs2 pnictides and EuB6 probed by infrared spectroscopy under high-pressure and low-temperatures / Abid Karim. Betreuer: Christine A. Kuntscher." Augsburg : Universität Augsburg, 2014. http://d-nb.info/1077704267/34.
Full textWattiaux, Alain. "Etude du comportement électrocatalytique relatif au dégagement de l'oxygène des pérovskites non-stoechiométriques La1-xSrFe1-zCOzO3-y." Phd thesis, Université Sciences et Technologies - Bordeaux I, 1985. http://tel.archives-ouvertes.fr/tel-00574567.
Full textDarracq, Stéphane. "Contribution à l'étude des corrélations entre stoechiométrie, structure, liaison chimique et propriétes physico-chimiques de perovskites oxygénées renfermant un élément 3d a un degrè d'oxydation inusuel (Cu(III), Cu(IV), Fe(IV))." Phd thesis, Université Sciences et Technologies - Bordeaux I, 1993. http://tel.archives-ouvertes.fr/tel-00136172.
Full textBook chapters on the topic "SrFeO"
Liang, Chong, De An Yang, Jian Jing Song, and Ming Xia Xu. "Oxygen Sensitivity of SrFeO3-δ Thin Films Prepared by Sol-Gel Method." In High-Performance Ceramics III, 315–18. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-959-8.315.
Full textMorimoto, S., K. Kuzushita, and S. Nasu. "Mössbauer Study of Ba Doped Cubic Perovskite SrFeO3." In Hyperfine Interactions (C), 177–80. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-010-0281-3_44.
Full textAli, Hassan, Hassan Soleimani, Noorhana Yahya, and Mohammed Falalu Hamza. "Simulation and Experimental Study for Electromagnetic Absorption in Sandstone with SrFeO3 Nanofluid." In Proceedings of the 6th International Conference on Fundamental and Applied Sciences, 393–401. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-4513-6_34.
Full textPatrakeev, M. V., V. L. Kozhevnikov, I. A. Leonidov, J. A. Bahteeva, and E. B. Mitberg. "Phase Transitions and Ion Transport in SrFe1-XMXO2.5, where M = Ga, Cr." In Mixed Ionic Electronic Conducting Perovskites for Advanced Energy Systems, 163–68. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2349-1_13.
Full textXu, Zh J., R. Q. Chu, S. C. Cui, and J. S. Zhang. "Synthesis of Mixed Conducting Oxides SrFeCo0.5Oy Powder by Citrate Method." In Key Engineering Materials, 971–73. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-410-3.971.
Full textXu, Zh J., R. Q. Chu, S. C. Cui, Long Zhi Zhao, and J. S. Zhang. "Change of Microwave Dielectric Loss during the Solid-Reaction Synthesis of SrFeCo0.5Oy." In High-Performance Ceramics V, 183–84. Stafa: Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/0-87849-473-1.183.
Full textKobayashi, Tatsuya. "Electronic Phase Diagram and Superconducting Property of $$\text {SrFe}_2\text {(As}_{1-x}\text {P}_x)_2$$." In Study of Electronic Properties of 122 Iron Pnictide Through Structural, Carrier-Doping, and Impurity-Scattering Effects, 19–36. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4475-5_3.
Full textZhang, Heng, Xin Fa Dong, and Wei Ming Lin. "Preparation of SrFe0.6Cu0.3Ti0.1O3-δ Mixed Oxygen-Ionic and Electronic Conductor." In High-Performance Ceramics V, 259–62. Stafa: Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/0-87849-473-1.259.
Full textMiller, Miroslav, and Aleksandra Matraszek. "Vaporization and Thermochemical Study of SrCeO3(s) and SrCe0.95Yb0.05O3(s) by Knudsen Effusion Mass Spectrometry." In Solid State Phenomena, 319–30. Stafa: Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/3-908451-49-3.319.
Full textRam, S. "Magnetic and Magnetic Resonance Studies on Oxygen-Deficient SrFeO 3-y Perovskites." In May 16, 55–62. De Gruyter, 1988. http://dx.doi.org/10.1515/9783112495223-006.
Full textConference papers on the topic "SrFeO"
Sendilkumar, A., S. Srinath, Dinesh K. Aswal, and Anil K. Debnath. "Magnetization And ESR Study Of SrFeO[sub 3-δ] Systems." In INTERNATIONAL CONFERENCE ON PHYSICS OF EMERGING FUNCTIONAL MATERIALS (PEFM-2010). AIP, 2010. http://dx.doi.org/10.1063/1.3530505.
Full textManimuthu, P., D. Paul Joseph, S. Philip Raja, M. Kovendhan, C. Venkateswaran, Alka B. Garg, R. Mittal, and R. Mukhopadhyay. "Investigation of the Less Oxygen Deficient SrFeO[sub 3-δ]." In SOLID STATE PHYSICS, PROCEEDINGS OF THE 55TH DAE SOLID STATE PHYSICS SYMPOSIUM 2010. AIP, 2011. http://dx.doi.org/10.1063/1.3606286.
Full textSendilkumar, A., V. R. Reddy, M. Manivel Raja, P. D. Babu, A. Gupta, and S. Srinath. "Mössbauer effect in tetragonal SrFeO3-δ." In SOLID STATE PHYSICS: Proceedings of the 56th DAE Solid State Physics Symposium 2011. AIP, 2012. http://dx.doi.org/10.1063/1.4710461.
Full textPrabhu, E., K. I. Gnanasekar, V. Jayaraman, and T. Gnanasekaran. "Studies on the oxygen sensing characteristics of SrFe1−xTixO3-δ." In 2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS). IEEE, 2015. http://dx.doi.org/10.1109/ispts.2015.7220140.
Full textPrabhu, E., K. I. Gnanasekar, V. Jayaraman, and T. Gnanasekaran. "Studies on the oxygen sensing characteristics of SrFe1−xTixO3-δ." In 2015 2nd International Symposium on Physics and Technology of Sensors (ISPTS). IEEE, 2015. http://dx.doi.org/10.1109/ispts.2015.7220150.
Full textSu, Kai, and Yin Li. "Discussion of SRFEM with Mohr-Coulomb Plasticity Model in Slope Stability Analysis." In 2012 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC). IEEE, 2012. http://dx.doi.org/10.1109/appeec.2012.6307001.
Full textDongil Shin and R. J. Gambino. "Magnetic properties of exchange spring magnets in the system of Ni/SrFe/sub 12/O/sub 19/." In IEEE International Magnetics Conference. IEEE, 1999. http://dx.doi.org/10.1109/intmag.1999.837751.
Full textOkamoto, J. "Magnetic Circular X-ray Dichroism Study of Paramagnetic and Anti-Ferromagnetic States in SrFeO3 Using a 10-T Superconducting Magnet." In SYNCHROTRON RADIATION INSTRUMENTATION: Eighth International Conference on Synchrotron Radiation Instrumentation. AIP, 2004. http://dx.doi.org/10.1063/1.1757993.
Full textJaiswal, Shivendra Kumar, and Jitendra Kumar. "Sol-Gel Synthesis and Magnetic, Optical and Impedance Behaviour of Strontium Ferrite Powder." In ASME 2011 International Manufacturing Science and Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/msec2011-50067.
Full textThakur, Ajay D., A. K. Yadav, A. Thamizhavel, C. V. Tomy, S. Ramakrishnan, and A. K. Grover. "Vortex pinning mechanism in single crystal of iron arsenide superconductor SrFe[sub 1.7]Co[sub 0.3]As[sub 2]." In SOLID STATE PHYSICS: PROCEEDINGS OF THE 57TH DAE SOLID STATE PHYSICS SYMPOSIUM 2012. AIP, 2013. http://dx.doi.org/10.1063/1.4791467.
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