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Perpendicular Spin-Transfer Torque (STT) MRAM is a promising technology in terms of read/write speed, low power consumption and non-volatility, but there has not been a demonstration of high density manufacturability at small geometries. In this paper we present an unprecedented demonstration of a robust STT-MRAM technology designed in a 2x nm CMOS-embedded 40 Mb array. Key features are full array...
3D printing, also known as additive manufacturing, has been considered as the next big thing that can potentially spread as cell phone industry. Nowadays, product resolution restricted by material and fabrication process is ranging from 20 to 300 pm and still has the trends toward higher precision. However, tradeoff between time costs and resolution is always a dilemma in Fused Deposition Modeling...
The rare-earth manganites R1−xAxMnO3 have stimulated considerable scientific and technological interest in recent years due to their exotic electronic and magnetic properties [1]The fascinating physics of these materials is driven by a close coupling between charge, spin, lattice and orbital degree of freedom, which has commonly resulted in phase separation between charge/orbital order (COO) and ferromagnetic...
The development of new permanent magnet materials is of particularly importance since the high-performance Nd2Fe14B are expensive due to the limited reserves of rare earth Nd, Tb, Dy on the earth. In the past several years, much attention has been attracted to the permanent magnet without rare earth[1], such as Zr2Co11, HfCo7 and Mn-based alloys, and excellent performance has been observed. For example,...
The (La1−yPry)1−xCaxMnO3 systems has been extensively studied in recent years as a typical electronic phase separation(PS) system. [1-4] As well known, the average radius of A sites in the ABO3 structure plays a key role in determining the band (W) and electronic characteristics of the perovskite manganites. Uehara et al has found that the chemical replacement of Pr for La (Pr is smaller than La)...
Growth and characterization of graphene grown using copper foils as well as copper films on silicon dioxide on silicon substrates were performed. Kinetics of growth and effective activation energy for the graphene synthesis will be discussed for the surface catalytic synthesis of graphene. Conditions for large-scale synthesis of monolayer graphene will be addressed in this talk. Wafer-scale graphene...
The stress relaxation behavior of copper thin films in electro-thermo-mechanical multiple fields has been studied by a developed wafer-curvature method. Experimental results reveal that the electromigration plays an important role in the relaxation process. At tensile stress state, coupled surface diffusion and grain boundary diffusion are the dominant mechanisms even at low temperature. In addition,...
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