A dilute polyamic acid solution was spin-deposited onto gold substrates and XPS analyses were performed after deposition. Evidence of the presence of organic films on the top surface of the substrates was feund. A chemical characterization allowed us to identify these organic films as being polyamic acid after a 125OC curing and polyimide after a 240°C curing. From angledependent data we have shown that the gold substrates were coated quasi-uniformly by ultra-thin films. This conclusion was confirmed by an Auger analysis. The computed thicknesses were found in a range of 1.3 to 2.9 nm depending on the sample preparation conditions. Adsorption was supposed to occur just after the deposition. Some possible mechanisms of the interfacial interaction between the polyamic acid and the surface were proposed. A thermally-activated chain cleavage was supposed to occur at the interface or near the interface.

Frequency and field dependence of magnetoelectric interactions in layered ferromagnetic transition metalpiezoelectric lead zirconate titanate Appl. Phys. Lett. 87, 222507 (2005); 10.1063/1.2137450 Fluctuation field and time dependence of magnetization in TbFeCo amorphous rare earth-transition metal thin films for perpendicular magnetic recording A study of complex permeability in rare earthsubstituted cobalt/nonmagnetic transition metal amorphous thin films J. Appl. Phys. 73, 5592 (1993); 10.1063/1.353661 Microstructure and magnetism in amorphous rare earth-transition metal thin films

By using radio-frequency (rf) sputtering, amorphous ferromagnetic thin films of composition (Co93Zr7)100−yREy (RE=Nd, Pr, Dy, Tb, Gd, or Sm: magnetic rare earth elements) have been prepared. This work was performed for small amounts of RE substitution (y<3). These films exhibit static soft magnetic properties similar to CoZr alloys. For all compositions studied, a low in-plane uniaxial anisotropy Hk appears, whose magnitude depends upon composition and preparation parameters. Above a critical substitution level, a biaxial anisotropy exhibiting an in-plane Hk and a perpendicular component Hp is measured for films containing Gd or Sm. The substitution by RE atoms essentially affects the frequency-response shape of complex permeability, depending on nature, concentration of RE atoms and on values of both Hk and Hp. High-frequency permeability spectra could be well fitted by a theoretical model based on magnetization changes due to rotation, using a composition-dependent Landau–Lifshitz damping term. The results on films exhibiting uniaxial or biaxial anisotropy are reported and discussed.

In this paper, the design and the results of a Silicon-on-Insulator (SOI) CMOS distributed amplifier (DA) and oscillator are presented. The four stage Cascode DA (CDA) is designed with a 130 nm SOI floating body n-MOSFET in each stage requiring a chip area of 0.75 mm 2 . A gain of 7 dB and a unity-gain bandwidth of 26 GHz are measured at 1.4 V supply voltage with a measured power consumption of 54 mW . The CDA circuit has been extended to design a cascode distributed oscillator (CDO) showing a 3 dBm carrier at 10 GHz oscillating frequency, for 2.5 V supply voltage.

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