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Showing 1 to 20 of 50 for “"Co-Fe"”.
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Dielectric reliability and spin dependent transport in Co-Fe-B/MgO/Co-Fe-B magnetic tunnel junctions
… new proporties or functions. These developments concern a new type of non-volatile memories. In contrast, conventional electronics is based on the use of an electric field to act on the charge of electrons. The electronic spin gives rise to the magnetism of solids, but also provides a means to …
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Flash-Sintering of MnCo2O4 and (La, Sr)(Co, Fe)O3 Ceramics for Potential Application in SOFC
The innovative flash-sintering technique has been considered to investigate the effect of DC electric field on sintering and electrical conductivity of two oxide ceramics MnCo2O4 and La0.6Sr0.4Co0.2 Fe0.8O3 (LSCF). These oxides are renowned for their high electrical conductivity and oxygen …
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Application Of Scanning Hall Probe Microscopy For High Throughput Characterization Of Combinatorial Magnetic Materials
<p>A Scanning Hall Probe Microscope (SHPM) with a submicron Hall probe (HP) was used for high efficiency characterization of magnetic materials at high magnetic fields. Specifically, we have studied phase diagrams of Co-Fe-Ni binary and ternary alloys, as well as weak itinerant ferromagnet MnSi. …
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Studies on two nickel-containing enzymes from Methanosarcina thermophila TM-1
The cell extract protein content of acetate- and methanol-grown Methanosarcina thermophila was examined by two-dimensional polyacrylamide gel electrophoresis to determine the extent of regulation by the growth substrate. More than 100 mutually-exclusive spots were present in acetate- and …
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INVESTIGATION OF MATERIALS AND ANALYSIS TECHNIQUES FOR PERFORMANCE ENHANCEMENT OF PERPENDICULAR MAGNETIC TUNNEL JUNCTIONS
… p-MTJ free layer are studied by changing the composition of CoFeB free layer, along with the optimization of the material adjacent to magnetic free layer as perpendicular anisotropy enhancing layer (PEL). We find Co/(Co+Fe) ∼ 35% for the free layer and Ta/(W+Ta) ∼ 40% for the PEL to have …
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Novel materials for magnetic tunnel junctions
… in magnetic tunnel junctions (MTJs). MTJs consist of two ferromagnetic layers separated by a thin (~2nm) insulating layer, usually amorphous Al2O3. The resistance of the structure depends on the relative orientation of the magnetizations of the ferromagnetic electrodes. The normalized …
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The biogeochemistry and distribution of dissolved trace metals in the Aegean Sea
Samples for the analysis of dissolved Mn, Co, Fe, Pb, Cu, Ni, Cd, Zn, nitrate plus nitrite, silicon and phosphate were collected at 7 stations in the northern and 6stations in the southern Aegean Sea, eastern Mediterranean, in both March and September 1997. This represents the first extensive …
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Pac-man shaped magnetic tunnel junctions for SEU-resistant CMOS-based magnetic flip flops for space applications
… for magnetization process. The experimental effect of CoFe and IrMn thickness on the exchange field and coercivity of a Co₉₀Fe₁₀/Ir₂₀Mn₈₀ bilayer was studied. Metal mask process was used to fabricate rectangular shaped MTJ devices and the devices were characterized for magnetoresistance. In …
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Synthesis, characterisation and reactivity studies of μ(α, ω)-alkanediyl complexes of ruthenium, iron and cobalt
The new series of μ(α, ω)-alkanediyl compounds of ruthenium, [CpRu(CO)₂]₂[μ-(CH₂)ₙ], where n=5-10, have been prepared from Na[CpRu(CO)₂] and the corresponding diiodoalkane. These compounds, which are stable crystalline solids at ambient temperature, have been fully characterised by microanalysis, …
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ΔΙΑΧΩΡΙΣΜΟΣ ΣΤΟΙΧΕΙΩΝ ΜΕΤΑΠΤΩΣΕΩΣ ΜΕ ΥΓΡΗ ΧΡΩΜΑΤΟΓΡΑΦΙΑ ΥΨΗΛΗΣ ΠΙΕΣΗΣ
… CHROMATOGRAPHY (HPLC). THE SEPARATION OF NI, CO, FE, CR, MO, V AND W FIRSTLY AS CHLORIDES AND SECONDLY AS CHELATES WAS STUDIED. SEPARATIONS OF NI/CO DIETHYLDITHIOCARBAMATES MO/CO/CR OXINATES NI, V/CR THIONATES WERE OBTAINED. THE STUDY OF THE MAIN CHROMATOGRAPHIC PARAMETERS (MOBILE PHASE, …
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Heavy metal pollution and blackheaded gull (larus ridibundus L.) breeding ecology
… the environment. These metals may have profound consequences for birds and can cause a number of sub-lethal effects, such as decreased reproductive success. The concentrations of selected heavy metals (As, Cd. Co, Cu, Fe, Pb, Mn, Ni, V, Zn) and Se in eggs and feathers from populations of …
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Geology and isotope geochemistry of the Beaver-Temiskaming Silver Mine, Cobalt, Ontario
Silver veins at the Beaver-Temiskaming mine are economic in Archean mafic volcanic and intercalated base-metal sulphide-rich sedimentary rocks, but uneconomic in the Proterozoic Nipissing diabase sill. Textural and isotopic evidence indicate a paragenetic succession of silicates, …
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Aspects of group 14 element - transition metal cluster chemistry
The synthesis of Sn[Fe₂(CO)₈]₂ from the SnCl₄/[Fe(CO)₄]²⁻ and SnCl₄/[Fe₂(CO)₈]²⁻ systems has been investigated. The reaction of SnCl₄ with the product mixture obtained by Na/amalgam reduction of Fe(CO)₅ provided the optimum yield (64% based on Sn). E[Co₂(CO)₇]₂ (E = Si, Ge), (CO)₄CoECo₃(CO)₉ (E = …
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Untersuchung der oberflächenverstärkten Infrarotabsorption am System Kohlenmonoxid auf dünnen Eisenfilmen
… und Kaliumbromid in Abhängigkeit von der CO-Bedeckung sowie von der Fe-Filmdicke untersucht. Die IR-Spektren unterscheiden sich in der Anzahl der CO-Absorptionslinien sowie in deren Frequenzen, Linienformen und Intensitäten. Bei CO/Fe/MgO(001) können die einzelnen Linien verschiedenen …
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Thermolysis Route for Accessing Amorphous Metal Sulfide Thin-Film Catalysts for the Hydrogen Evolution Reaction
… thermolysis of metal ethyl xanthates (M = Mo, Co, Fe, Ni) was used to prepare amorphous metal and mixed metal sulfide films on fluorine-doped tin oxide for the hydrogen evolution reaction (HER). Films prepared by dip-coating showed optimal coverage, as monitored by scanning electron microscopy, …
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Modeling and Design of a Three-dimensional Inductor with Magnetic Core
… etc. Current on-chip spiral inductors suffer from large parasitics and area for a meager value of inductance and quality factor. The need to overcome these issues has led to the development inductors with new geometries housing magnetic cores that show an enhanced inductance compared to …
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ΜΕΛΕΤΗ ΤΩΝ ΕΠΙΦΑΝΕΙΑΚΩΝ ΚΑΙ ΔΙΕΠΙΦΑΝΕΙΑΚΩΝ ΙΔΙΟΤΗΤΩΝ ΤΗΣ ΣΤΑΘΕΡΟΠΟΙΗΜΕΝΗΣ ΖΙΡΚΟΝΙΑΣ ΚΑΙ ΣΥΣΤΗΜΑΤΩΝ ΖΙΡΚΟΝΙΑΣ ΣΕ ΕΠΑΦΗ ΜΕ ΡΕΥΣΤΑ ΜΕΤΑΛΛΑ
… EQUILIBRATION TECHNIQUE FOR THE MEASUREMENT OF CONTACT ANGLES, THE SURFACE AND GRAIN-BOUNDARY ENERGIES OF POLYCRYSTALLINE CUBIC ZRO2 IN THE TEMPERATURE RANGE OF 1173 TO 152 B.K. WERE DETERMINED. THE TEMPERATURE COEFFICIENTS OF THE LINEAR TEMPERATURE FUNCTION OBTAINED, ARE EXPRESSED AS …
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Germanium hydride derivatives of transition metal carbonyls
Compounds of the type Fe(CO)₄(GeR₃)₂ containing two different methylgermyl substituents have been prepared and characterised. The preparation was via the exchange reaction Fe(CO)₄(GeR₃)₂ + [Mn(CO)₅]⁻ → [Fe(CO)₄(GeR₃)]⁻ + Mn(CO)₅(GeR₃) [Fe(CO)₄(GeR₃)]⁻ + GeXR’₃ → Fe(CO)₄(GeR₃)(GeR’₃) The compounds …
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Investigation of the ammonia-formation electrodes for alkaline membrane electrosynthesis
… has demonstrated the great potential to become the next-generation ammonia-manufacturing technology that is scale-flexible, energy-efficient, and environmentally friendly. The research of this dissertation has been primarily conducted on the investigation into the electrodes of ammonia …
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