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With the increasing of the sintered NdFeB magnet application, there is a great deal of the demand of Nd, consequently the price of Nd is rising. Therefore, it is necessary to produce a novel sintered NdFeB magnet at low costs. In this paper, the dual-main-phase CeNdFeB magnets were prepared. The corrosion potential of Ce is −2.48V, which is lower than that of Nd (−2.41V) [1]. But Ce is much cheaper...
We study the effect of programming current on the endurance failure of phase change memory and propose a general scheme of optimizing programming currents for the most endurance cycles. We consider two major endurance failure modes, stuck-SET and open failure. We show that higher current does not necessarily cause, and even prevents the earlier open failure and attribute it to phase-dependent open-failure...
The high current density induced failure in Ge2Sb2Te5(GST)-based phase change memory (PCM) is investigated. A strong dependence of cycling endurance on the polarity of the operation current is observed and reported for the first time. The cycling endurance is reduced by 4 orders of magnitude when the current polarity is reversed. Careful TEM analysis of failed cells revealed a thin void in GST over...
MBE growth of InP-based HBTs on GeOI/Si substrates is described. A GaAs buffer is nucleated on the GeOI; then a graded InAlAs metamorphic buffer transitions the lattice constant to InP. TEM shows minimal anti-phase boundaries and limited dislocations propagating into the device layers. Large area DC parameters are similar to LM HBTs grown on InP. Small area devices exhibit peak current gain cutoff...
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