We have developed a Josephson 4-Kbit RAM with improved component circuits and device structure having two Nb wiring layers. A resistor coupled driver sense circuit are to wide operating margins. The fabrication process is simplified using bias sputtering, as result, its reliability increased. composed of approximately 21000 Nb/AlO/sub x//Nb junctions, Mo resistors, wirings, SiO/sub 2/ insulators. Experimental results show minimum access time 380 ps power dissipation 9.5 mW. Maximum bit yield...

We report improvements in the crystallinity of a III–V-based diluted magnetic semiconductor (Ga, Mn)As by heat treatment (annealing) after growth at comparatively low temperatures. This method can be used to raise Curie temperature 100 K without need for severe optimization conditions, as well adjust material parameters desired values.

A pipelined 8-bit-serial single-flux-quantum (SFQ) microprocessor, called CORE1 , was designed and tested.The has two cascaded arithmetic logic units (ALUs) based on forwarding architecture, which can perform register operations from one instruction.Pipelining is also extensively adopted to enhance the performance.A new design method, known as one-hot encoding, been introduced into of control circuit.The 4-stage-pipelined SFQ microprocessors, 8, have implemented using CONNECT cell library...

Magneto-caloric effects (MCEs) measurement system in adiabatic condition is proposed to investigate the thermodynamic properties pulsed magnetic fields up 55 T. With taking advantage of fast field-sweep rate field, measurements MCEs were carried out at various temperatures. To obtain prompt response thermometer a thin film grown directly on sample surfaces. The validity present setup was demonstrated wide temperature range through Gd about room and Gd3Ga5O12 low both results show reasonable...

We have successfully demonstrated an 8-bit microprocessor using passive transmission lines based on single-flux-quantum LSI technology. In the designed here, called CORE1/spl alpha/6, a simple bit-serial architecture with seven instructions was employed. floor plan consideration toward integration of memory, and superconductive (PTLs) were used to connect circuit blocks. Utilization PTLs helped us reduce propagation delay in long interconnections. The design flexibility enhanced performance...

The introduction of passive-transmission-line (PTL) wiring to large-scale SFQ logic circuits offers several advantages over traditional Josephson-transmission-line (JTL) wiring, such as smaller area, less delay, lower power consumption, and more freedom in routing. PTL can drastically change the style designing circuits. We propose a new methodology for using wiring. Aiming at generalizing circuit design, we chose synchronous clocking. developed placer that was suitable design assist us with...

The dynamics of magnetization under femtosecond optical excitation is studied in a ferromagnetic semiconductor ${\mathrm{Ga}}_{0.94}{\mathrm{Mn}}_{0.06}\mathrm{As}$ with time-resolved magneto-optical Kerr effect measurement two-color probe beams. transient reflectivity change indicates the rapid rise carrier temperature and relaxation to quasithermal equilibrium within few ps, while very slow spin order 500 ps observed. This anomalous behavior originates from thermal isolation between charge...

We have investigated the infrared optical absorption \ensuremath{\alpha}(\ensuremath{\omega}) of ferromagnetic p-type ${\mathrm{Ga}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{As}.$ The observed showed very non-Drude characteristics, indicating that holes are nearly localized by disorder. Furthermore, a temperature-dependent spectral transfer between interband and intraband transitions is observed, which strongly suggests double-exchange-like mechanism playing an important role in ordering...

We developed a design approach for interface circuits to connect Single Flux Quantum (SFQ) cells by using passive transmission lines (PTL's). In the approach, an circuit between PTL and JTL is optimized obtain standard circuit, then, modifications are made previously designed SFQ PTL's. The key point use of approximately same with every cell maintain matching condition Based on this we test composed two D-flip-flops connected 2-mm-long PTL's via circuits. impedance was 2 /spl Omega/....

A Josephson 256-word/spl times/16-bit RAM that includes a power circuit has been developed to enable high-frequency clock operation. This consists of 4/spl times/4 matrix array 256 blocks, impedance-matched lines, and signal amplifiers. power-supply circuit, composed transformer regulator, is included in each block. Fail bit maps for the block were measured, perfect operation with 100% yield was obtained. The functioned up frequency 1.07 GHz. We succeeded feeding large current more than 2...

The Mn-site-projected electronic structure of the diluted magnetic semiconductors ${\mathrm{Ga}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{As}$ $(x=0.032,$ 0.038, 0.047, 0.052, 0.058) as-grown and low-temperature (LT) annealed samples are systematically studied using high-resolution Mn $2p$ absorption spectroscopy. study exhibits coexistence ferromagnetic ${\mathrm{Mn}}^{2+}$ ion paramagnetic Mn-As complex that transforms into component with LT annealing. ratio to components is directly...

We report on development of a cryocooled system prototype for high-throughput single flux quantum (SFQ) digital applications. The was designed to have 32 I/O links with bandwidth 10 Gbps/port. An SFQ multi-chip module (MCM), double mu-metal magnetic shields, 40-K radiation shield, customized GaAs cryogenic amplifiers, 32-pin wide-bandwidth cryo-probe, and cables were packaged in vacuum chamber together two-stage 4-K 1-W Gifford-McMahon (G-M) cryocooler. S-parameter measurements showed that...

The magnetic a and c axes are switched by applying high field in ${\mathrm{DyCu}}_{2}$ single crystal. virgin state has the Ising axis along direction with two-step metamagnetism but is to higher than 13 T axis. recovery of obtained either increasing temperature above 100 K or 5 switching cycle quantitatively explained first order phase transition model.

A calorimeter for measuring the temperature dependence of specific heat in pulsed magnetic fields is described. An Au0.16Ge0.84?thin-film thermometer and a Ni50Cr50?film heater are employed to obtain rapid thermal response necessary magnetic-field experiments. The apparatus has been tested up 56.2 T (?0.3 T) low range from 3 20?K. To demonstrate validity technique, measurements have performed on single crystal samples SiO2?and Cu3Mo2O9.

In this study, dynamic optimization of heat treatment for reducing the water loss in fruit during storage wasinvestigated using intelligent approaches. Over a temperature range from 15.C to 40.C, control process was divided intol steps (l = 6). The change rate as affected by first identified neuralnetworks, and then optimal combination lstep setpoints that minimized wassearched through simulation model genetic algorithms. Two types values, singleapplication stress double application stress,...

Magnetism arising from edge spins is highly interesting, particularly in 2D atomically thin materials which the influence of edges becomes more significant. Among such materials, molybdenum disulfide (MoS2; one transition metal dichalcogenide (TMD) family) attracting significant attention. The causes for magnetism observed TMD family, including MoS2, have been discussed by considering various aspects, as pure zigzag atomic-structure edges, grain boundaries, and vacancies. Here, we report...

We designed and fabricated a 4 /spl times/ switch in which all interconnections were implemented using passive transmission lines (PTLs). The consisted of four identical 2 switches connected PTLs. was gate-to-gate interconnections. Using the on-chip testing method, we demonstrated 40-GHz operation switch. To verify effectiveness interconnection, compared with an that Josephson (JTLs) for comparison showed PTL-version had 50% fewer junctions required 55% less powering current. latency largest...

We have carried out an ultrahigh-field cyclotron resonance (CR) study of $p$-type ${\mathrm{In}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{As}$ films, with $\mathrm{Mn}$ composition $x$ ranging from 0 to 2.5%, grown on $\mathrm{GaAs}$ by low-temperature molecular-beam epitaxy. Pulsed magnetic fields up $500\phantom{\rule{0.3em}{0ex}}\mathrm{T}$ were used make observable in these low-mobility samples. Clear CR spectra been observed for all the samples at high megagauss range and even room...

Abstract Recently cyber-attacks become serious threats even for control systems. For process control, not only security but also safety must be assured. assurance, the effects of such as concealed remote operation and maneuvering evaluated. We proposed a securing method to divide field networks into plural zones. Even when zone is intruded attacks are concealed, appear in other In this paper, an automatic detection system using PCA (Principal Component Analysis) proposed. There many kinds...

We provide evidence for spin-triplet electron pairing in proximity-induced superconductivity a ferromagnetic semiconductor (In,Fe)As. As discovered half-metallic materials, an extraordinarily long proximity range is observed. More surprising very strong concentration of supercurrent to the edges superconducting region, which deduced from extremely persistent oscillation critical current vs magnetic field. The maxima appear not at zero flux but around maximum disorder, reflecting connectivity...

A new type of blockade effect – spin–orbit-induced (SOIB) has been observed in the conduction a quantum dot (QD) made material with spin–orbit interaction. The arises from spin filtering point contact (QPC), which is component QD. Hence appearance itself evidence QPC. lower bound efficiency estimated to be above 80%.