FePt-BN granular HAMR media with high grain aspect ratio and high L10 ordering on corning Lotus™ NXT glass

Fabricating highly ordered tall L1(0)-FePt with a small grain pitch distance on a commercially available glass substrate is crucial to realize heat-assisted magnetic recording (HAMR) media for industrial manufacture. We have realized tall FePt grains surrounded by crystalized h-BN on Corning NXT (TM) glass deposited at elevated temperatures in the presence of radio frequency (RF) bias. In this paper, we discuss the effect of deposition temperature on the order parameter of L1(0)-FePt-BN granular media. Well-isolated L1(0)-FePt-BN granular media with a grain diameter of 6.5 nm and height of 11 nm is achieved. These films exhibit a high order parameter of 0.85 with a perpendicular coercivity of 35 kOe. (c) 2023 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

Automated summary

Fabricating highly ordered tall L1(0)-FePt with a small grain pitch distance on a commercially available glass substrate is crucial for heat-assisted magnetic recording (HAMR) media in industrial manufacture. Researchers achieved tall FePt grains surrounded by crystalized h-BN on Corning NXT (TM) glass through deposition at elevated temperatures in the presence of radio frequency (RF) bias. The study discusses the effect of deposition temperature on the order parameter of L1(0)-FePt-BN granular media and achieved well-isolated granular media with a high order parameter and perpendicular coercivity.