Materials Literature
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The effect of Fe on hydrogenation behavior of 2:17 type SmCo alloys was investigated. The as-cast Sm(CobalFexCu0.068Zr0.034)7.33alloys with (x= 0.251) and (x=0.265) are decrepitated under hydrogen pressure of 0.3 MPa at room temperature, whereas the as-cast alloy with (x=0.237) is not decrepitated. The hydrogenation a…
We have investigated the magnetic properties of cobalt ferrite films epitaxially grown on MgAl2O4(110) substrates. The unit cell of the cobalt ferrite film on the substrate with twofold surface symmetry is tetragonally distorted with c/a <; 1, and the film exhibits uniaxial magnetic anisotropy parallel to the in-plane…
Based on the nudged elastic band model, we investigate the thermal energy barrier and its field dependence of a circular-shaped perpendicular nanomagnet for various exchange constants and cell sizes. We find that the energy barrier depends not only on the cell size but also on the exchange stiffness constant when the…
A very sensitive thin-film sensor was developed using a coplanar line fabricated from SrTiO (Sr33Ti16O51) film (0.5, 1, 2, 3, and 6 μm thick), amorphous CoNbZr film (5 μm thick), and Cu/Cr film (4 μm/0.2 μm). The deposited SrTiO film had high permittivity of around 31. This film enhanced the sensitivity of the magneti…
We develop a color image sensor with three stacked organic photoconductive films (OPFs) sensitive to only one primary color component (red (R), green (G), or blue (B)); each OPF has a signal readout circuit. This type of stacked image sensor enables a small color camera to achieve high picture quality, because color-s…
This paper describes a novel multipoint thin film polymer pressure/force sensor enabling detection of pressure/force pulse wave. The sensor features a high sensibility of 11mv/mmHg along with an extremely thin thickness of 100 μm and a high flexibility to adapt to the radial artery portion. The sensor uses charged cel…
This paper presents a novel slotless limited-angle torque motor (LATM) for reaction wheels torque measurement system. The proposed slotless LATM has a uniform torque profile during its operating range, constant torque coefficient owing to avoiding saturation in back iron core. The slotless LATM has been designed and o…
The finite dissolution model of silicon particles in the aluminum melt is built and calculated by the finite difference method, and the lower dissolution limit of silicon particles in the aluminum melt is proposed and verified by experiments, which could be the origin of microinhomogeneity in aluminum—silicon melts. W…
Recent advances in the preparation and applications of composite magnetic nanoparticles are reviewed and summarized, with a focus on cancer-related applications.
A series of Zn—Cu—In—S nanocrystals (ZCIS NCs) are prepared and the optical properties of the ZCIS NCs are tuned by adjusting the reaction time. It is interesting to observe that the temperature-dependent photoluminescence (PL) spectra of the ZCIS NCs show a redshift with decreasing intensity at low temperature (50–28…
We present the experimental evidences showing that three different electron injection models play roles in Alq 3 based organic light-emitting diodes in sequence when the thickness of LiF interlayer is changed. It is found that the device with a 0.2 nm LiF layer displays the largest current with declined luminescence.…
Multi-walled carbon nanotube (MWCNT)—Fe composites were prepared via the metal organic chemical vapor deposition by depositing iron pentacarbonyl on the surface of MWCNTs. The structural and morphological analyses demonstrated that Fe nanoparticles were deposited on the surface of the MWCNTs. The electromagnetic prope…
This paper proposes Gain Scheduling (GS) control for magnetic levitation device using redundant descriptor representation. The purpose of this study is to stably float a steel ball and let the distance between a coil and a steel ball follow the reference without error. GS control has a potential not only to deal with…
The brief overview of published articles on Nitinol studies reflects, in fact, a little misunderstanding of a thermodynamic importance since there is no whole concept or paradigm considering the martensite transition and related effects in terms of thermodynamic arguments. TiNi-based alloys are basically functional ma…
This paper compares force measurements on a shielded coreless linear permanent magnet motor with 2-D models. A 2-D semianalytical modeling method is applied, which is based on Fourier modeling and includes force calculations. The semianalytical modeling correctly predicts the behavior found in the measurements, disreg…
The temperature and frequency dependences of the permittivity and conductivity of FeGa2Se4 crystals under an applied alternating current are investigated. The values of the permittivity are determined. It is assumed that an increase in ɛ′ is related to an increase in the defect concentration with temperature. It is es…
Equilibrium potentials of Pr-In alloys containing 8.7–12.1 mol % Pr and alloys of Pr with In-Ga eutectic saturated by praseodymium up to 6.71 mol % Pr are measured by the emf method between 573–1073 K in the (Li-K-Cs)Cl eut based salt melt. Metallic praseodymium is used as the reference electrode when studying the Pr-…
Aluminate perovskite with a 75% simulator of actinide-REE (Nd, Sm, Ce) fraction of high-level radioactive wastes (HLW) from reprocessing of spent nuclear fuel (SNF) has been synthesized and studied. The radiation stability of perovskite in the process of 244Cm decay (T 1/2 = 18 yr) was investigated. Its structure has…
Defekte an Wellen führen zu einer deutlichen Reduktion der Lebensdauer. Festwalzen bietet eine einfache Möglichkeit, Risswachstum an Defekten zu verlangsamen oder überhaupt zu verhindern, vorausgesetzt die Fehlergröße überschreitet nicht die Einflusszone der eingebrachten Druckeigenspannungen. Im Rahmen dieser Arbeit…
In the numerical integration of the Landau-Lifshitz-Gilbert (LLG) equation, stiffness (stability restrictions on the time step size for explicit methods) is known to be a problem in some cases. We examine the relationship between stiffness and spatial discretization size for the LLG with exchange and magnetostatic eff…