Initializing process on direct overwrite method using exchange-coupled quadilayer magneto-optical film
A direct overwrite mechanism of the exchange-coupled quadri-layered film using light intensity modulation has been investigation. The initializing process in the overwrite mechanism was studied. It was found that the writing layer had two different coercivities depending on the magnetization state of its adjacent layers. The coercivity of the writing layer in the initializing process was lower than that of the single layer. Thus, the overwrite recording was achieved with good recording characteristics. How this phenomenon plays a critical role in the initializing process was clarified. It was also found that this process occurred well above room temperature. >
Inverted and biased loops in amorphous Gd-Co films
Amorphous Gd-Co films sputtered at substrate biases ≤100V showed compensation temperature differences of about 100°C between the film-glass (FG) and film-air (FA) surfaces, as measured by Kerr rotation. The films exhibited normal as well as inverted Kerr and Hall loops, but throughout the temperature range between compensation temperatures either the FG or FA surface, but not both, showed inverted Kerr loops. Inversion temperatures were found at which the inverted loop property was transferred from one film surface to the other. Biased loops were obtained from inverted loops by reducing the field amplitude in one polarity. The bias field, H B , was identified as the effective field of exchange-coupled Gd-Rich and Co-rich layers. By the use of H B data the interlayer wall energy density was estimated to be 0.9 ±0.2 ergs cm-2.
Fault Diagnosis and CAN Bus/Ethernet Redundancy Design of a Monitoring and Control System
The ship monitoring system is used to monitor and control the working status of various equipment on the ship. The navigational safety of the ship is affected directly by the stable working of the monitoring system. In this paper, a ship monitoring system with fault-type judgment function and bus redundancy is designed to improve system reliability and reduce fault checking cost. A redundant Ethernet/CAN bus communication network is constructed in the system, which connects multiple simulation nodes. The simulation node can simulate the faults that may occur during the communication process and feeds back the fault information to the host computer. The host computer will analyze and display the corresponding fault type on the user interface with the feedback information is received. The system reconfigures the network route autonomously when the simulation node has a communication fault. Routing of fault nodes can be switched to redundant routing, and the load balancing of the communication network can be maintained. Through experimental tests, the system can accurately locate faults and achieve fast switching of redundant routes between buses. Hence, the reliability of data transmission is improved.