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Impact ionization [1,2], or electron-hole pair creation by charged particles, has been one of the central issues of semiconductor physics and devices. However, due to its complexity of the process, most experimental studies and their analyses have been macroscopic and phenomenological. This situation prevents us from exploring the fundamental physics of impact ionization and of high-energy charged...
L10-ordered FePt granular thin film is the leading candidate for heat assisted magnetic recording (HAMR) media due to its high magnetocrystalline anisotropy constant (∼ 6.6 MJ/m3) that allows smaller thermally stable grain size (∼ 4 nm) [1].
Current-perpendicular-to-plane giant magnetoresistance (CPP-GMR) devices with Co-based Heusler alloys have recently drawn considerable attention due to their potential application as read sensors for ultrahigh density magnetic recording.1,2,3,4 With a non-magnetic Ag spacer layer, the resistance change-area product (ΔRA) of epitaxial pseudo spin valves (PSVs) on single crystalline (001) MgO substrates...
An advanced module structure for taking advantage of superior characteristics of Silicon Carbide (SiC) device was researched and developed. This structure can realize about four times of power rating density and one half of thermal impedance compared to that of conventional structure. Also, this structure achieved to have higher reliability by applying epoxy molding structure and copper pin connection...
Silicon die stacking with low-volume interconnections is an attractive method for 3D integration. It offers such benefits as extension to fine-pitch integration, increased vertical heat transfer and hierarchy for repeated thermal processes without re-melting. The process uses low-volume solder to form joints of few microns high. The low-volume solder mostly forms intermetallic compounds with underlying...
Copolymers of vinylidene fluoride, VDF, and trifluoroethylene, TrFE, are representative ferroelectric polymers. Their local properties, such as domain structure and domain wall motion, are not well known because of its complex structure. In the isothermally crystallized samples, we can obtain lamellae that grow separately on the substrates. Then in order to discuss the local state of the polarization...
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