A Memristor as Multi-Bit Memory: Feasibility Analysis

The use of emerging memristor materials for advanced electrical devices such as multi-valued logic is expected to outperform today's binary logic digital technologies. We show here an example for such non-binary device with the design of a multi-bit memory. While conventional memory cells can store only 1 bit, memristors-based multi-bit cells can store more information within single device thus increasing the information storage density. Such devices can potentially utilize the non-linear resistance of memristor materials for efficient information storage. We analyze the performance of such memory devices based on their expected variations in order to determine the viability of memristor-based multi-bit memory. A design of read/write scheme and a simple model for this cell, lay grounds for full integration of memristor multi-bit memory cell

Switching Current vs. Magnetoresistance in Magnetic Multilayer Nanopillars

We study current-driven magnetization switching in nanofabricated magnetic trilayers, varying the magnetoresistance in three different ways. First, we insert a strongly spin-scattering layer between the magnetic trilayer and one of the electrodes, giving increased magnetoresistance. Second, we insert a spacer with a short spin-diffusion length between the magnetic layers, decreasing the magnetoresistance. Third, we vary the angle between layer magnetizations. In all cases, we find an approximately linear dependence between magnetoresistance and inverse switching current. We give a qualitative explanation for the observed behaviors, and suggest some ways in which the switching currents may be reduced.Comment: 3 pages, 4 figure

Supporting international students to meet assessment expectations

This paper offers practical suggestions for teaching strategies that will assist international students. A case study is presented involving the delivery of an introductory engineering unit at the Perth Institute of Business and Technology. The approach detailed allowed the academic staff to identify areas of concern in students’ learning early in the semester. Detecting and addressing these issues led to a signifi cant improvement in preparing these students to meet the exam requirements

Personal Property and Sales -- 1961 Tennessee Survey

The Tennessee courts have heretofore denied recovery in actions for breach of warranty in the absence of privity of contract between the plaintiff and the defendant.\u27 The required privity had not previously been found when a manufacturer was sued by a consumer who purchased from an intermediate dealer. . . . ================================ Contractual Disclaimer.-In the Dodson case, there was an alter-native holding that the consumer could recover on the theory of an implied warranty of quality or fitness. The significance of such a holding lies in the fact that the express warranty which the court found running from General Motors to the plaintiff recited that it was expressly in lieu of all other warranties, expressed or implied... . . . ================================= Sale Postponed Until Final Judgment in Replevin Action.-Under the Conditional Sales Act as enacted in Tennessee, a conditional vendor must advertise the property for sale within ten days after repossession and proceed to sale under such advertisement. If the vendor fails to advertise and sell as required by statute, the defaulting vendee may recover from the seller any part of the consideration which he has paid

Study of dopants for radiation-resistant silicon Final report

Radiation effects on electrical properties of both aluminum and lithium doped bulk silico

Manipulating Current-Induced Magnetization Switching

We summarize our recent findings on how current-driven magnetization switching and magnetoresistance in nanofabricated magnetic multilayers are affected by varying the spin-scattering properties of the non-magnetic spacers, the relative orientations of the magnetic layers, and spin-dependent scattering properties of the interfaces and the bulk of the magnetic layers. We show how our data are explained in terms of current-dependent effective magnetic temperature.Comment: 6 pages, 6 figures, submitted to MMM'04 proceeding

A Model for Managing Decision-Making Information in the GIG-Enabled Battlespace

The Defense Department is transforming information-technology systems into a Global Information Grid (GIG) that will connect sensors to weapons systems and provide unprecedented situational awareness. The authors suggest that if not properly implemented, the GIG may overwhelm war fighters with information presented at the wrong time, at the wrong level of detail, and without proper analysis. This article proposes a model to direct the flow of information in the GIG

Current-Driven Magnetic Excitations in Permalloy-Based Multilayer Nanopillars

We study current-driven magnetization switching in nanofabricated Ni84Fe16/Cu/Ni84Fe16 trilayers at 295 K and 4.2 K. The shape of the hysteretic switching diagram at low magnetic field changes from 295 K to 4.2 K. The reversible behavior at higher field involves two phenomena, a threshold current for magnetic excitations closely correlated with the switching current, and a peak in differential resistance characterized by telegraph noise, with average period that decreases exponentially with current and shifts with temperature. We interpret both static and dynamic results at 295 K and 4.2 K in terms of thermal activation over a potential barrier, with a current dependent effective magnetic temperature.Comment: 4 pages, 4 Figure