A5062218933- Magnetic properties of thin films
- Adhesion, Friction, and Surface Interactions
- Near-Field Optical Microscopy
- Photonic and Optical Devices
- Theoretical and Computational Physics
- Plasmonic and Surface Plasmon Research
- Thermal properties of materials
- Force Microscopy Techniques and Applications
- Optical Coatings and Gratings
- Bone Tissue Engineering Materials
- Phase-change materials and chalcogenides
- Thermal Radiation and Cooling Technologies
- Structural Analysis of Composite Materials
- Hygrothermal properties of building materials
- Semiconductor Quantum Structures and Devices
- Additive Manufacturing Materials and Processes
- Advanced Thermoelectric Materials and Devices
- Additive Manufacturing and 3D Printing Technologies
- Photonic Crystals and Applications
Seagate (United States)
2023
Carnegie Mellon University
2015-2020
Nanyang Technological University
2017
As electronics continue to shrink, heat management at the nanoscale has become increasingly important. The authors show that thermal conductance a metal-dielectric interface can be improved by half an order of magnitude inserting just 1 nm another metal. Multifunctional interfaces, as in plasmonic applications for heat-assisted magnetic recording, could exploit this benefit with little impact on other properties.
The method of Lamb and Wilson modified for use at low temperatures is used thermal conductivity measurements insulating materials in the range temperature +18 to -180° C. For finely granulated loosely packed fibrous materials, gradient was experimentally determined intermediate values along were obtained. coarsely or only mean observed. general shape conductivity-temperature curve relation density packing various discussed. compressible insulators, variation with densities has been found...
We measure the effect on surface plasmon resonance of introducing Cr in a range thicknesses between 0 and 6.4 nm at interface SiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Au using attenuated total reflectance free space wavelength 658 nm. The measured curves were fit to equations for reflectivity three-interface system extract thickness effective ε xmlns:xlink="http://www.w3.org/1999/xlink">r</sub> layer. For 1.2 layer, we...
A write head design consisting of a split pole and gapped near-field transducer is presented. Through simulation, we found our can produce maximum effective cross-track recording field gradient 300 Oe/nm, difference 3.6 kOe between the center ±20 nm away in direction media near magnetic gap (MG). The tradeoff improved loss optical efficiency due to parasitic absorption by studied as function thickness low optical-index separator MG (OG). tapered bring close OG air bearing surface, while...
Heat assisted magnetic recording (HAMR) has been shown to provide substantial growth in hard disk areal densities compared the conventional perpendicular [1 , 2] . The continued of density capability (ADC) HAMR media relies on grain-size reduction its grains. As we continue reduce grain-size, however, maximum ADC is expected close around ~3 Tbpsi, limited by lowered stability grains [1] Dual layer media, with an exchange break separating two layers distinct Tc was proposed [3] as a design...
Deep neural networks (DNNs) have been used to investigate geometrical scaling of heat-assisted magnetic recording (HAMR). Our investigation considers areal density capability (ADC) sensitivity with respect distinctive design features. We study HAMR performance by numerical key parameters including thermal profile spot size and reader dimension. DNNs are trained based on a full system model, which includes the writer, reader, channel detector, accelerate ADC optimization through scaling. In...
We demonstrate through simulation the excitation of guided modes on a gold waveguide by perpendicularly oriented Si <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> N xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> waveguide. can achieve 55% coupling efficiency for 70 nm Au nanowire, and ability mode selection larger nanowires supporting multiple modes.
In this work, heat assisted magnetic recording (HAMR) is simulated to assess the areal density advantages of various realistic thermal profiles. Specifically, finite element simulation and micromagnetic modeling are used consequences a straighter profile with an associated wider track. This assessment done by simulating profiles created heads gapped near field optical transducers (NFTs) split poles. By varying gap width NFT thickness medium interlayer, above variation in transition...