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The effect of the interactions between the grains on magnetic switching is analyzed by micromagnetic simulation for achieving effective magnetic switching in microwave assisted magnetic recording. The switching window of the grain with another grain of the same magnetization shifts to lower frequencies, while the switching window of the grain with another grain of opposite magnetization shrinks from...
To simply determine the accuracy of multi-axis laser welding path, this article proposes a hybrid dynamic modeling method for mechanical system with lumped elastic and flexible parts, based on finite segment and finite element modeling. The method is applied to a multi-axis laser welding machine tool, leading to the establishment of its dynamic virtual prototyping. The accuracy of the multi-body dynamics...
Surface plasmons (SPs) are electromagnetic waves propagating along metallic-dielectric interfaces which can be supported by structures at broad scales and can find extensive applications from sensing to optical waveguiding. SPs can take different forms, from free waves to localized oscillations depending on different geometries. The excitation of the spectrum of a plasmonic nanostructure is determined...
Metamaterials are artificial electromagnetic structures that can have a negative refractive-index, not available in nature. Until now, many different structures have been investigated and considerable approaches have been realized. However, fabrication of metamaterials is still a critical issue due to the difficulty of etching metals especially when the structure dimension is reduced. In this letter,...
Tetrahedral carbon (ta-C) overcoat is deposited on disk. Nitrogen is doped in ta-C and its effect on lubricant bonding is studied. The research shows that nitrogen doping content and sp3/sp2 ratio in carbon are the two key factors to affect the bonding of lubricant with carbon overcoat, the study reveals that lubricant bonding on ta-C is much different with lubricant bonding on sputtered a-C.
The effect of pattern shape on etching wall profile in slider fabrication is studied. The testing results show: (1) the wall profile of round pattern is steeper than that of long rectangular; (2) for round patterns, the smaller the radius is, the steeper the wall profile is; (3) the profile of outer angle is steeper than that of inner angle. The flying height offset caused by wall profile with different...
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