US 12,308,056 B2
Magnetic recording medium with magnesium-titanium oxide (MTO) layer formed using pulsed direct current sputter deposition
Hoan Cong Ho, San Jose, CA (US); Paul Christopher Dorsey, Los Altos, CA (US); Tomoko Seki, Sunnyvale, CA (US); and Pierre-Olivier Jubert, San Jose, CA (US)
Assigned to Western Digital Technologies, Inc., San Jose, CA (US)
Filed by Western Digital Technologies, Inc., San Jose, CA (US)
Filed on Oct. 12, 2023, as Appl. No. 18/379,410.
Prior Publication US 2025/0124951 A1, Apr. 17, 2025
Int. Cl. G11B 5/66 (2006.01); G11B 5/73 (2006.01); G11B 5/851 (2006.01); G11B 5/00 (2006.01)
CPC G11B 5/66 (2013.01) [G11B 5/7369 (2019.05); G11B 5/851 (2013.01); G11B 2005/0021 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A magnetic recording medium comprising:
a substrate;
a heatsink layer on the substrate, the heatsink layer comprising Cr;
a thermal resistive layer on the heatsink layer, the thermal resistive layer comprising RuAlTiO2;
an underlayer on the thermal resistive layer, wherein the underlayer comprises a first MgO—TiO layer with less than 50 mol % of TiO and a second MgO—TiO layer comprising 50 or more mol % of TiO; and
a magnetic recording layer comprising FePt on the underlayer.