Experimental study of smear formation and removal in heat-assisted magnetic recording

Q Cheng, DB Bogy - Tribology International, 2022 - Elsevier
The head-disk interface (HDI) in heat-assisted magnetic recording (HAMR) hard disk drives
is a system where a laser beam is launched from a recording head and focused on a …

In-situ sub-angstrom characterization of laser-lubricant interaction in a thermo-tribological system

Q Cheng, S Rajauria, E Schreck, R Smith… - Communications …, 2024 - nature.com
Laser-lubricant interaction has been a critical reliability issue in a thermo-tribological system
named heat-assisted magnetic recording, one of the next generation hard disk drive …

Measurement of angstrom-level laser induced protrusion using touchdown in heat-assisted magnetic recording

Q Cheng, H Wang, SV Sakhalkar, DB Bogy - Applied Physics Letters, 2020 - pubs.aip.org
In heat-assisted magnetic recording (HAMR), a laser is employed above the read-write
transducer to provide energy to the media, lowering its coercivity. However, the laser also …

Resolving the extra dimensions for gravity

ME Boyd - IEEE Sensors Journal, 2024 - ieeexplore.ieee.org
The weakness of the force of gravity compared to the electromagnetic force and other
fundamental forces is referred to as the hierarchy problem. If gravity propagates in several …

Analytical Investigation of Touchdown Characteristics of Flying Head Slider for Quasi-Contact Recording

K Ono - Tribology Letters, 2023 - Springer
Reducing the fly-height between the head and disk to less than 1 nm with high reliability is
necessary to improve the recording density of magnetic disks. Therefore, the mechanism of …

Tunability of recording head protrusion by use of embedded dual heaters

Q Cheng, DB Bogy - Tribology Letters, 2022 - Springer
In hard disk drives, a recording head and a recording disk constitute a high-speed sliding
system: head–disk interface, where the head with a prescribed thermal protrusion on its …

A Particle-Level Study of Smear Buildup in Heat-Assisted Magnetic Recording Disk Drives

RM Tom - 2024 - search.proquest.com
Ever since the first hard disk drive (HDD) was invented in 1956, it has played a dominant
role in global data storage needs. Conventional HDDs, however, have reached the …

Direct measurement of disk-to-head back-heating in HAMR using a non-flying test stage

Q Cheng, SV Sakhalkar, DB Bogy - Applied Physics Letters, 2022 - pubs.aip.org
Heat assisted magnetic recording, as one of the next generation hard disk drive solutions to
high areal density over 1 Tb/in. 2, integrates a laser delivery system to facilitate data writing …

[图书][B] Thermal Transport, Thermal Protrusion, and Thermally-Induced Material Transfer in the Head-Disk Interface of Heat-Assisted Magnetic Recording

Q Cheng - 2021 - search.proquest.com
As data generated worldwide are growing explosively, it is crucial to increase the areal
density of traditional storage devices to satisfy the requirements. Conventional hard disk …

[图书][B] Nanoscale Lubricant Flow and Heat Transfer at the Head-Disk Interface in Hard Disk Drives

SV Sakhalkar - 2020 - search.proquest.com
In the hard disk drive (HDD) industry, technologies such as Heat-Assisted Magnetic
Recording (HAMR) and Microwave-Assisted Magnetic Recording (MAMR) are currently …