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Microwave soft magnetic films (SMFs) are key materials, which can effectively miniaturize and multifunctionalize the electromagnetic components and devices, such as filters, phase shifters, thin film wireless inductors, magnetic recording write heads, antennas, etc.1, and reduce their occupation area in microwave monolithic integrated circuit (MMIC) boards. Modern electronic products are heading towards...
On hard disk surfaces, lubricant layer not only contributes for triological requirement, but also inhibits the generation of corrosion. Corrosion resistance is a key factor in the novel lubricant development. This paper studies the corrosion products on disk surfaces with different lubricant. The relationship between the lubricant molecular structure/properties and the corrosion product composition/distribution...
The investigation reported in this paper studies the motion of a typical pico type slider as a function of disk waviness. Laser Doppler vibrometry (LDV) is used to study the motion of a slider on three disks with different waviness. In addition, numerical analysis is applied to determine stiffness and damping of the slider motion as a function of disk waviness. Defining the ratio of slider motion...
Conventional magnetic recording has been projected to suffer from superparamagnetic instabilities at high bit densities. Heat assisted magnetic recording (HAMR) is one of the promising approaches to overcome this problem. The track where writing is taking place is heated and cooled rapidly. The lubricant is therefore required to withstand repeated temperature changes from room temperature to above...
A drive level measurement of flying height modulation and a demonstration of slider-disk contact control was conducted. The results of the flying height modulation strongly agree with those obtained from a Laser Doppler Vibrometer (LDV) measurement. The modulation was mainly caused by curvature caused by disk clamping. Furthermore, feedback control of a slider-disk contact was successfully demonstrated...
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