Results 261 to 270 of about 1,385,537 (289)
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A novel FeS cluster in Fe-only hydrogenases
Trends in Biochemical Sciences, 2000Many microorganisms can use molecular hydrogen as a source of electrons or generate it by reducing protons. These reactions are catalysed by metalloenzymes of two types: NiFe and Fe-only hydrogenases. Here, we review recent structural results concerning the latter, putting special emphasis on the characteristics of the active site.
Y, Nicolet +3 more
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Epitaxial growth of Fe/Mo/Fe(111) and Fe/Cr/Fe(111) on Si(111)
Journal of Materials Research, 1993Epitaxial body-centered cubic Mo and Cr films have been grown on the (111) surface of α–Fe films on Si(111) at 300 and 575 K by electron beam evaporation in ultrahigh vacuum. X-ray diffraction and transmission electron microscopy show that the Mo films are oriented with the (111) plane parallel to the α-Fe(111) plane and with the Mo[1$\overline 1$0 ...
Yang-Tse Cheng, Yen-Lung Chen
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Magnetic structure of Fe/Cr/Fe trilayers
Physical Review B, 1993The magnetic structure of Cr films deposited on single crystal Fe(001)/GaAs(001) substrates is investigated by soft x-ray magnetic circular dichroism (SXMCD) of the L2 and L3 absorption edges. We find that 0.25 ML Cr coverages result in Cr moments aligned with each other and antialigned to the underlying Fe moment direction.
Idzerda, Y. +5 more
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2018
Results are presented from magnetic and magnetooptical studies of the magnetic configurations in a three-layer film Fe(30?????)/Si(14?????)/Fe(30?????) in which ferromagnetic and biquadratic exchange between iron layers is observed and which also possesses cubic and uniaxial anisotropy. These studies were done at temperatures of 300 and 10 K.
Baran, M. +3 more
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Results are presented from magnetic and magnetooptical studies of the magnetic configurations in a three-layer film Fe(30?????)/Si(14?????)/Fe(30?????) in which ferromagnetic and biquadratic exchange between iron layers is observed and which also possesses cubic and uniaxial anisotropy. These studies were done at temperatures of 300 and 10 K.
Baran, M. +3 more
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Fe–Mg Interdiffusion in (Mg,Fe)O
Physics and Chemistry of Minerals, 2005We have performed a series of interdiffusion experiments on magnesiowustite samples at room pressure, temperatures from 1,320° to 1,400°C, and oxygen fugacities from 10−1.0 Pa to 10−4.3 Pa, using mixed CO/CO2 or H2/CO2 gases. The interdiffusion couples were composed of a single-crystal of MgO lightly pressed against a single-crystal of (Mg1-x
Mackwell, Stephen +2 more
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2020
The process of formation of the ??-Fe solid solution crystals at constant-rate heating the Fe??????B?????? amorphous alloy has been studied by means of X-ray diffractometry, differential scanning calorimetry (DSC) and resistance measurements. The experimental data have been analyzed using the proposed analytical model based on combination of Kolmogorov
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The process of formation of the ??-Fe solid solution crystals at constant-rate heating the Fe??????B?????? amorphous alloy has been studied by means of X-ray diffractometry, differential scanning calorimetry (DSC) and resistance measurements. The experimental data have been analyzed using the proposed analytical model based on combination of Kolmogorov
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Structural and magnetic analysis of MBE-grown Fe/Si/Fe and Fe/Ge/Fe sandwiches
Journal of Magnetism and Magnetic Materials, 1997Abstract The structure and the interlayer exchange coupling in MBE-grown nominal Fe/Ge1−xFex/Fe(x=0.0, 0.25, 0.33, 0.5) and Fe/Si/Fe sandwiches with wedge-shaped spacer layers were investigated. In the case of Fe/Si a sample with a wedge-shaped magnetic layer was also studied. From a structural analysis with LEED and from a magnetic analysis with the
de Vries, J.J. +6 more
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Nanocrystalline Fe and Fe-riched Fe-Ni through electrodeposition
Nanostructured Materials, 1999Abstract There is a constant need for new softer magnetic materials, especially with high saturation moments. A number of studies have shown that by decreasing the average crystal size of a material below 20 nm, it is possible to reduce its magnetic losses.
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2017
Great interest to of multilayer magnetic structures since the middle 80s of the 20th century has been originated by a pronounced progress in production of superthin metallic films. For some years their fascinating (from fundamental and applied standpoints) properties, such as antiparallel ordering of ferromagnetic layers, giant magnetoresistance, sign ...
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Great interest to of multilayer magnetic structures since the middle 80s of the 20th century has been originated by a pronounced progress in production of superthin metallic films. For some years their fascinating (from fundamental and applied standpoints) properties, such as antiparallel ordering of ferromagnetic layers, giant magnetoresistance, sign ...
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2016
?? ???????????? ???????????????????????? ???????????????????? ???????????????????? ???????????????? ?????????????????????????? ???? ???????????????????????????????????? ???????????????????????? ?????????????????????????????? ???????????????????? ???????????? Fe/Ge/Fe. ????????????????, ???? ?????? ?????????????????? ?????????????????????? ???? ?????????
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?? ???????????? ???????????????????????? ???????????????????? ???????????????????? ???????????????? ?????????????????????????? ???? ???????????????????????????????????? ???????????????????????? ?????????????????????????????? ???????????????????? ???????????? Fe/Ge/Fe. ????????????????, ???? ?????? ?????????????????? ?????????????????????? ???? ?????????
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