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Characteristics of superconducting FeSe0.5Te0.5 hot electron bolometer are reported. The superconducting FeSe0.5Te0.5 film is grown by pulsed laser deposition on MgO substrate, and its transition temperature and complex conductivity indicate that the film quality is good enough for hot electron bolometer. We then fabricate hot electron bolometer based on the superconducting FeSe0.5Te0.5 film, and...
We have investigated superconducting properties of niobium titanium nitride (NbTiN) films to be used for the lower and upper electrodes of a microstrip line with a SiO2 insulator on a quartz substrate at Terahertz frequencies. NbTiN films were prepared on a 1-mm thick quartz substrate directly (assumed to be the lower electrode of the microstrip line) and on an about 150-nm thick SiO2 layer sputtered...
With the implementation of the thermal flying height control (TFC) slider, the flying height is reduced to approximately 2 nanometers [1], the gaseous rarefaction effects, surface roughness and surface accommodation effects must be taken into account. The surface accommodation coefficient (AC) is an important factor to govern the flying characteristics of the air bearing slider [2-3]. Effects of gaseous...
Multiferroic composites with combined ferromagnetic (FM) and ferroelectric (FE) phases have attracted extensive attention due to their strong magnetoelectric (ME) coupling at room temperature [1-4]. Specifically in magnetic-piezoelectric heterostructures, the voltage applied to the piezoelectric layer produces a mechanical deformation that couples to the magnetic layer, and thus induces a change in...
MnTe is a kind of antiferromagnetic semiconductor with Néel temperature (TN) of 307 K [1]. Mn1−xCrxTe was investigated as diluted magnetic semiconductor [2]. The structure, magnetic and transport properties of MnTe [3] and Mn1−xCrxTe [4,5] films were investigated. In these previous works, some of the films represent different characteristic from the bulk ones, such as ferromag-netism at room temperature...
Ferromagnetic electrodes with perpendicular magnetic anisotropy (PMA) have been extensively studied because of the outstanding performance in applications. [1] To obtain high tunneling magnetoresistance (TMR), researchers have put efforts to realize PMA with Co-based full-Heusler alloy films with MgO barrier. However, the lattice mismatch between MgO and full-Heusler alloy leads to a rapid TMR reduction...
This abstract describes room temperature ozone sensing using a ZnO based film bulk acoustic resonator (FBAR). The resonant frequency of the FBAR decreased upon ozone exposure due to the density increase of the ZnO film. Ozone can be adsorbed on the ZnO surface by capturing free electrons from the film, which increases the film density. The minimum detectable concentration is 21 ppb (parts per billion)...
We studied a low temperature deposition of tungsten-alloy barrier and copper layers only by electroless plating, with an aim of realizing low resistance TSV with a high aspect ratio. We succeeded in successive deposition of W-Ni-P barrier layer and Cu on SiO2. Furthermore, we found that the addition of Cl ions to SPS- and PEG-plating bath significantly improved the conformal deposition property even...
This paper described ultraviolet (UV) radiation sensing using ZnO based Film Bulk Acoustic-wave Resonator (FBAR). The resonant frequency upshifted when there was UV illumination on the FBAR. For 365 nm UV light, the frequency upshift was 9.8 kHz with an intensity of 600 muW/cm2, and the detection limit of the sensor was 6.5 nW. The frequency increase of the FBAR UV sensor was proposed to be due to...
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