Dissimilar diffusion bonds of TiAl alloy to AISI 310 stainless steel using Ni/Ti reactive multilayers were studied in this investigation. The Ni and Ti alternating layers were deposited by d.c. magnetron sputtering onto the base materials, with a bilayer thickness of 30 and 60 nm. Joining experiments were performed at 700 and 800 ̋C for 60 min under pressures of 50 and 10 MPa. The effectiveness...

The optical constants of uranium (U) and amorphous silicon (a-Si) at 304 and 584 Å in the extreme ultraviolet (EUV) are a source of error in the design of multilayer optics. Measured reflectivities of multilayer mirror coatings do not agree with calculated reflectivities using existing optical constants. The optical properties of materials depend on the electronic structure of the atom or compo...

An unexplored physical mechanism which produces a magnetoelectric effect in ferroelectric-ferromagnetic multilayers is studied based on first-principles calculations. Its origin is a change in bonding at the ferroelectric-ferromagnet interface that alters the interface magnetization when the electric polarization reverses. Using Fe/BaTiO3 multilayers as a representative model, we show a sizable...

The temperature dependence of the saturation magnetization of Xe ion-beam sputtered Fe–Cr multilayers has been measured between 5 and 300 K in the presence of a field greater than the saturation field sHsatd. With the application of Hsat, the zero-field antiferromagnetically coupled ferromagnetic Fe layers are forced to align ferromagnetically. We find that the thermal demagnetization of such m...

Superconducting thin films have the potential to overcome fundamental limitations of bulk niobium technology that is currently implemented in linear particle accelerators. Before these thin films can successfully be implemented, systematic studies on structureproperty correlations are necessary. Here, we present the characterization of niobium nitride thin films and multilayers. We explore the ...

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Ta oxide (TaOx) is investigated as a resistive buffer layer for the growth of high-quality Co/Pt multilayers with perpendicular magnetic anisotropy (PMA). The Pt/(Co/Pt)3 films grown on TaOx buffer layers exhibit stronger PMA than those grown on Pt buffer layers, and are of comparable quality to films grown on metallic Ta. The optimized multilayers with TaOx buffer layers remain out-of-plane ma...

A novel method to quantitatively analyze the domain reversal behavior has been adopted to understand the total-thickness-dependent domain reversal behavior in Co/Pd multilayers. The wall-motion speed and the nucleation rate were simultaneously determined by analyzing serial domain images observed using a real-time domain observation system. Using this method, sensitive decrement of the wall-mot...

AlN nanolayers in sputter deposited {111}Al/AlN/TiN multilayers exhibit the metastable zinc-blende-structure (z-AlN). Based on density function theory calculations, the growth of the z-AlN is ascribed to the kinetically and energetically favored nitridation of the deposited aluminium layer. In situ nanoindentation of the as-deposited {111}Al/AlN/TiN multilayers in a high-resolution transmission...

Abstract Numerous carrier scatterers, such as atomic defects, fixed oxide charges, impurities, chemical residues, and undesired surface adsorbates, including oxygen water molecules, strongly degrade the mobility of atomically thin two-dimensional (2D) materials. However, effect adsorbates oxidation on density profile along thickness 2D multilayers is not well known, particularly for a substanti...