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Theory of interlayer exchange coupling

Patrick Bruno1999-05-03arXiv

This paper contains the notes of lectures on the theory of interlayer exchange coupling presented at the 30-th Ferienschule of the Institut fuer Festkoerperforschung, Forschungszentrum Juelich, March 1999.

Mesoscale and Nanoscale PhysicsMaterials Science

[M3V18O42(H2O)12(XO4)]⋅24 H2O (M=Fe, Co; X=V, S): Metal Oxide Based Framework Materials Composed of Polyoxovanadate Clusters

M. Ishaque Khan、Elizabeth Yohannes、Robert J. Doedens1999-05-03Angewandte Chemie International Edition

New framework materials composed of well-defined vanadium oxide clusters were prepared by low-temperature reactions and characterized by X-ray crystal structure analysis. The structures of these solids contain {V18O42} cages linked into two interpenetrating three-dimensional networks by bridging {M(H2O)4} groups (M=Fe…

Metal-Organic Frameworks: Synthesis and ApplicationsPolyoxometalates: Synthesis and ApplicationsAdvanced Nanomaterials in Catalysis

Universal Approach for Scaling the ac Conductivity in Ionic Glasses

David L. Sidebottom1999-05-03OpenAlex

In a recent Letter, Roling et al. [Phys. Rev. Lett. 78, 2160 (1997)] proposed a novel scaling approach, requiring no arbitrary parameters, for the analysis of the ac conductivity resulting from ionic motion in glasses. However, this approach cannot be applied to alkali germanate glasses whose alkali content varies by…

Material Dynamics and PropertiesGlass properties and applicationsSolid-state spectroscopy and crystallography

Rheological, thermal, and morphological properties of ABS-PA1010 blends

Ge Gao、Jingyuan Wang、Jinghua Yin 等 8 位作者1999-05-02Journal of Applied Polymer Science

Noncompatibilized and compatibilized ABS–nylon1010 blends were prepared by melt mixing. Polystyrene and glycidyl methacrylate (SG) copolymer was used as a compatibilizer to enhance the interfacial adhesion and to control the morphology. This SG copolymer contains reactive glycidyl groups that are able to react with PA…

Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties

Isotactic polypropylene/ethylene-co-propylene blends: Influence of the copolymer microstructure on rheology, morphology, and properties of injection-molded samples

L. D’Orazio、C. Mancarella、E. Martuscelli 等 5 位作者1999-05-02Journal of Applied Polymer Science

Meltrheological behavior, phase morphology, and impact properties of isotactic-polypropylene (iPP)-based blends containing ethylene–propylene copolymer (EPR) synthesized by means of a titanium-based catalyst with very high stereospecific activity (EPRTi) were compared to those of iPP/EPR blends containing EPR copolyme…

Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties

Effects of sodium hydroxide and calcium hydroxide on polyester fabrics

Mohammad Haghighat Kish、Mahdi Nouri1999-05-02Journal of Applied Polymer Science

The results of a comparison between the effects of sodium hydroxide and calcium hydroxide on poly(ethylene terephthalate) fabrics are presented. Calcium hydroxide can produce weight-loss effects similar to an aqueous solution of sodium hydroxide. The effects of some treatment variables on weight loss, fiber diameter,…

Dyeing and Modifying Textile FibersTextile materials and evaluationsColor Science and Applications

Chemistry of novolac resins. X. Polymerization studies of HMTA and strategically synthesized model compounds

Audrey S. C. Lim、David H. Solomon、Xiaoqing Zhang1999-05-01Journal of Polymer Science Part A Polymer Chemistry

The reactions between hexamethylenetetramine (HMTA) and compounds which model novolac resins have been studied by 13C- and 15N-NMR techniques. The dimer and tetramer compounds vary in molecular size and structure and react with HMTA to yield benzylamines and benzoxazine as the major initial-formed intermediates and co…

Epoxy Resin Curing ProcessesSynthesis and properties of polymersSynthesis of Tetrazole Derivatives

Análise da relação entre distância de separação entre partículas (IPS) e viscosidade de suspensões

Fernando dos Santos Ortega、Rafael Giuliano Pileggi、V. C. Pandolfelli1999-05-01Cerâmica

O crescente interesse em ampliar a previsibilidade dos fenômenos que ocorrem durante a fabricação de materiais cerâmicos por processos coloidais, como a variação da viscosidade de suspensões, tem estimulado a implantação de vários modelos teóricos com tal finalidade. Considerando a concentração de sólidos na suspensão…

Clay minerals and soil interactionsInnovations in Concrete and Construction MaterialsMineral Processing and Grinding

Raman study of SrBi2Ta2O9thin films

E. Ching‐Prado、W. Pérez、A. Reynés‐Figueroa 等 6 位作者1999-05-01Ferroelectrics Letters Section

Thin films of SrBi2Ta2O9 (SBT) were deposited on Si using Sol-Gel technique. The thicknesses of the films 200 nm (SBT2) and 400 nm (SBT4), respectively. SEM were studies showed most of the grains in the film are smaller than 0.1 μ. FTIR reflectivity measurements of the samples showed bands around 1260, 936(for SBT2),…

Ferroelectric and Piezoelectric MaterialsAcoustic Wave Resonator TechnologiesMicrowave Dielectric Ceramics Synthesis

Thermodesorption of CO and NO from Vacuum-Cleaved NiO(100) and MgO(100)

R. Wichtendahl、M. Rodriguez-Rodrigo、U. Härtel 等 5 位作者1999-05-01physica status solidi (a)

This paper presents experimental data on the bonding of CO and NO to vacuum-cleaved MgO(100) and NiO(100) and compares them with theoretical results. In the case of CO and NO on NiO(100) we find that the bonding energies obtained for the vacuum-cleaved single crystals agree well with results of recent studies on thin…

Catalytic Processes in Materials ScienceMetal and Thin Film MechanicsPlasma Diagnostics and Applications

Separation of weak EXAFS signal from atomic background in Br and Rb samples

Alojz Kodre、Jana Padežnik-Gomilšek、Iztok Arčon 等 4 位作者1999-05-01Journal of Synchrotron Radiation

In EXAFS analysis of Rb-doped silicate glasses and of cetyltrimethylammonium bromide (CTAB) adsorbed on carbon black, the spline approximation of the atomic background is inadequate. Instead, a residuum obtained from absorption spectra of Rb and Br ions in aqueous solution after removal of the structural signal is use…

Glass properties and applicationsElectrochemical Analysis and ApplicationsX-ray Spectroscopy and Fluorescence Analysis

Crystallization and preliminary X-ray diffraction studies of bleomycin-binding protein encoded on the transposon Tn5

Takanori Kumagai、Masafumi Maruyama、Yasuyuki Matoba 等 5 位作者1999-05-01Acta Crystallographica Section D Biological Crystallography

A bleomycin-binding protein, designated BLMT, encoded on the transposon Tn5 was crystallized using the vapour-diffusion method in a form suitable for X-ray diffraction analysis. Crystals were grown at pH 6.5 in 0.1 M sodium cacodylate and 0.2 M calcium acetate, using 25% PEG 6000 as a precipitant. They belong to the o…

RNA and protein synthesis mechanismsEnzyme Structure and FunctionBiochemical and Molecular Research

X-ray high temperature powder diffraction study and computer simulation of γ-LiNaCO3

S. G. Zhukov、A. V. Yatsenko、Владимир В. Чернышев 等 6 位作者1999-05-01Zeitschrift für Kristallographie - Crystalline Materials

Abstract The high-temperature γ -phase of lithium sodium carbonate ( γ -LiNaCO 3 , a = 8.311 Å, c = 3.386 Å, P [unk]) has been studied by X-ray diffraction and computer simulation methods. The results of computer simulation based on the ionic model and the temperature dependence of the superlattice reflection intensit…

Nuclear materials and radiation effectsChemical Synthesis and CharacterizationX-ray Diffraction in Crystallography

Charge density measurement of electret filters using alpha-ray ionizing radiation

Francisco J. Romay、Benjamin Y. H. Liu、Soo-Jae Chae1999-05-01Filtration & Separation

A new method to measure the effective charge density responsible for the enhanced particle capture of electret filters is reported. The experimental method relies on the use of ionizing radiation from a Po210 radioactive source combined with measurements of the penetration of particles of known size and charge through…

High voltage insulation and dielectric phenomenaGeophysical Methods and ApplicationsAerosol Filtration and Electrostatic Precipitation

Positive-definite conditions of elastic constants of two-dimensional quasicrystals with noncrystallographic symmetries

Jianbo Wang、Ruikang Zhang、Di-hua Ding 等 4 位作者1999-05-01Acta Crystallographica Section A Foundations of Crystallography

In the present work, the positive-definite conditions of the elastic constants of two-dimensional (2D) quasicrystals with non-crystallographic symmetries have been derived. These results are necessary for studying elastic and mechanical properties of two-dimensional quasicrystals both in theory and in experiment. Proj…

Quasicrystal Structures and PropertiesMineralogy and Gemology Studies

A quantitative in situ Fe K-XAFS study (T > 1270 K) on the oxidation degree of iron in (Mg1−x Fe x )1−δO

Nicole Hilbrandt、Manfred Martin1999-05-01Journal of Synchrotron Radiation

The point defect structure of a doped oxide, (Mg~_xFex)~.80, was quantitatively determined by in situ high temperature X-ray absorption spectroscopy (1270 K<T<1470 K). Spectra were recorded under defined oxygen activity at the dopanrs K-edge. The degree of oxidation o~ versus T, ao, and x can be consistently described…

Corrosion Behavior and InhibitionSemiconductor materials and devicesElectron and X-Ray Spectroscopy Techniques

On the crystal structure of Bi11Se12Cl9

Eggenweiler, Udo、Keller, Egbert、Krämer, Volker 等 5 位作者1999-05-01Zeitschrift für Kristallographie - Crystalline Materials

Abstract The structure of a compound previously described as Bi 8 Se 9 Cl 6 has been determined and refined to R = 0.040. It is very similar – if not identical – to the structure of a compound described as Bi 11 Se 12 Cl 9 . In contrast to the latter, it accounts for a weak fourfold superstructure and therefore differ…

Crystal Structures and PropertiesSolid-state spectroscopy and crystallographyInorganic Fluorides and Related Compounds

Experiences with digital analysis of discharges in high voltage components

Ε. Gulski、J.J. Smit、R. Brooks 等 4 位作者1999-05-01IEEE Electrical Insulation Magazine

The ability of digital PD analyzers to process and store specific information concerning discharge activity can be used for various purposes: discharge recognition and condition monitoring. To exploit these possibilities, a specific fingerprint technique has been successfully used in recent years for off-line and on-l…

High voltage insulation and dielectric phenomenaPower Transformer Diagnostics and InsulationElectrostatic Discharge in Electronics

Effect of tempering treatment on hydrogen‐induced cracking in high‐strength steel

Yujiro NAKATANI、Toshinori Higashi、K. Yamada1999-05-01Fatigue & Fracture of Engineering Materials & Structures

The fracture characteristics of high‐strength steel ASTM A‐490 under a hydrogen environment were investigated, with special emphasis placed on changes in fracture characteristics due to a tempering treatment at temperatures from 200 to 400 °C. A mechanical test was performed on cathodically charged specimens subjected…

Corrosion Behavior and InhibitionHydrogen embrittlement and corrosion behaviors in metalsMaterial Properties and Failure Mechanisms

Effect of Ultrasound Frequency on Sonochemical Luminescence under Well-Determined Sound Pressure

Hirotaka Yanagida、Yuichi Masubuchi、Keiji Minagawa 等 5 位作者1999-05-01Japanese Journal of Applied Physics

By determining sound pressure using the Ramann-Nath parameter and confirming sound form based on schlieren images, we investigated the effects of ultrasound frequency on the sonochemical luminescence of a luminol solution. Separating the effect into the luminescence threshold of sound energy and the rate of luminescen…

Ultrasound and Cavitation PhenomenaPhotoacoustic and Ultrasonic ImagingOptical and Acousto-Optic Technologies