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In 1980s', Nd2Fe14B magnet was invented, since then almost all kinds of rare-earth elements especially light rare earth and mischmetals have been used to fabricate permanent magnets with 2:14:1 structure. However, most of the investigations about mischmetal-based permanent magnets concentrated on their intrinsic properties [1], and the coercivity and energy product are seldom referred. The main reason...
Low resistance Ti/Al/Ni/Au Ohmic contact to (NH4)2Sx treated n-type GaN has been studied in the temperature range from 25??C to 600??C It is found that the specific contact resistivity ??c of the sample treated with (NH4)2Sx solution for 5 min at 90??C decreases with increasing measuring temperature, while the ??c of the sample treated with (NH4)2Sx solution for 25 min at 90??C increases with increasing...
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