Thin film alloys

Go Binary and Ternary Alloyed Thin Films. Most of the thin-film media for longitudinal and perpendicular recording consist of Co—X—Y binary or ternary alloys. In most cases Co—Cr is used for perpendicular recording while for the high density longitudinal media Co—Cr—X is used X = Pt, Ta, Ni). For the latter it is essential to deposit this alloy on a Cr underlayer in order to obtain the necessary in-plane orientation. A second element combined with Co has important consequences for the Curie temperature (T ) of the alloy, at which the spontaneous magnetisation disappears. The for... 

Although considerable research has been conducted with Pd-alloy foils, tubes, and thinner composite membranes, long-term durability and stability need to be further demonstrated, especially in the fuel reforming or WGS operating conditions, for acceptance of this technology in a commercial sector. Furthermore, mass-scale and cost-effective production of industrial-scale Pd-alloy thin-film composite membranes need to be demonstrated to be competitive in the hydrogen production and purification market. 

In this entry, the principal chemical features of defect populations (defect chemistry) will be described from the restricted viewpoint of crystalline inorganic solids. The influence of defects upon mechanical properties will be excluded and defects that may have greatest relevance to physical properties will be treated from the point of view of chemical importance. Defects in molecular crystals and amorphous and glassy solids will be omitted see Noncrystalline Solids), as will the important areas of alloys see Alloys), thin films see Thin Film Synthesis of Solids), and carbon nanotubes and related nanoparticles see Carbon Fullerenes). References to the literature before 1994 are to be found in the corresponding article in the first edition of this Encyclopedia. ... 

Takai M (1995) Magnetic properties of electroless-deposited NiFeB and electrodeposited NiFe alloy thin films. lEICE Trans Electron E78-C 1530-1535... 

Vacuum arc plasma discharges are intense sources of dense metal plasma, and can be used to deposit metal alloy thin films of various kind including both conventional alloys as well as non—equilibrium alloys. In our approach, the basic plasma deposition process is combined with the ion bombardment the method is environmentally friendly, highly efficient, can be scaled up to large size, and can synthesize films of a wide range of materials[5—9], A metal plasma of the required species is formed by a vacuum arc plasma gun and directed towards the substrate with a moderate streaming energy, typically in order of 100 eV. At the same time, the substrate is... 

The studies of amorphous RAl alloy thin films are recent ones. Two modes of evaporation have been used to obtain such samples. They consist either of utilizing a rf sputtering apparatus, or of evaporating from a tungsten crucible an agglomerate such as RAU. 

Li J.-T, Swiatowska J., Seyeux A., Huang L., Maurice V, Sun S.-G., Marcus P. XPS and ToF-SIMS study of Sn-Co alloy thin films as anode for lithium ion battery, J. Power Sources... 

Liu] Liu, X., Zangari, G., High Moment FeCoNi Alloy Thin Films Fabricated by Pulsed-Current Electrodeposition , IEEE Trans. Magn., 37(4), 1764-1766 (2001) (Experimental, Magn. Prop., Phys. Prop., 9)... 

Finally, SINTEF has developed a technique for the manufacture of Pd-based hydrogen separation membranes based on a two-step process, allowing a reduction in membrane thickness. First, a defect-free Pd-alloy thin film is prepared by magnetron sputtering onto a silicon wafer. In the second step the film is removed from the wafer. These films may subsequently be either used self-supported or integrated with various supports of different pore size, geometry and size. This allows, for example, the preparation of... 

The membrane module has a plate-type structure 40 mmW x 460 mmL x 8 mmT in size. Figure 12.2 illustrates the configuration of the membrane module, and Fig. 12.3 shows a view of the membrane modules. The membrane modules consist of palladium-rare earth alloy thin film with thickness of less than 20 pm and a porous structural support. The hydrogen permeability of the membrane is several times higher than that of the widely used conventional palladium-silver alloy membrane (Sakamoto, 1992). 

Lee E, Lee JM, Noh JS, Joe JH, Lee W (2010b) Hydrogen gas sensing performance of Pd-Ni alloy thin films. Thin Sohd Films 519 880-884... 

Figure 9.2. Drawing of a single source precursor for CVD [47]. (Reprinted with permission from Huang SF, Chi Y, Bock C, MacDougall B, Carty A. Preparation of the Ru-Pt alloyed thin-films by chemical vapor deposition using single source precursor. Chem Vap Dep...

Saunders, N. Miodownik, A.P. (1985). The use of free energy vs composition curves in the prediction of phase formation in codeposited alloy thin films. CALPHAD, Vol. 9, No. 3, (September 1985), pp. 283-290, ISSN 0364-5916... 

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