New! Sign up for our free email newsletter.
Science News
from research organizations

Proof-of-principle demonstration of 3-D magnetic recording

Possibility of ultra-high density hard disk drives with areal densities exceeding 10 Tbit/in² using multi-level magnetic recording

Date:
April 8, 2024
Source:
National Institute for Materials Science, Japan
Summary:
Research groups have made a breakthrough in the field of hard disk drives (HDD) by demonstrating the feasibility of multi-level recording using a three-dimensional magnetic recording medium to store digital information. The research groups have shown that this technology can be used to increase the storage capacity of HDDs, which could lead to more efficient and cost-effective data storage solutions in the future.
Share:
FULL STORY

Research groups from NIMS, Seagate Technology, and Tohoku University have made a breakthrough in the field of hard disk drives (HDD) by demonstrating the feasibility of multi-level recording using a three-dimensional magnetic recording medium to store digital information. The research groups have shown that this technology can be used to increase the storage capacity of HDDs, which could lead to more efficient and cost-effective data storage solutions in the future.

Data centers are increasingly storing vast amounts of data on hard disk drives (HDDs) that use perpendicular magnetic recording (PMR) to store information at areal densities of around 1.5 Tbit/in². However, to transition to higher areal densities, a high anisotropy magnetic recording medium consisting of FePt grains combined with heat-assisted laser writing is required. This method, known as heat-assisted magnetic recording (HAMR), is capable of sustaining areal recording densities of up to 10 Tbit/in². Furthermore, densities of larger than 10 Tbit/in² are possible based on a new principle demonstrated by storing multiple recording levels of 3 or 4 compared with the binary level used in HDD technology.

In this study, we succeeded in arranging the FePt recording layers three dimensionally, by fabricating lattice-matched, FePt/Ru/FePt multilayer films, with Ru as a spacer layer. Measurements of the magnetization show the two FePt layers have different Curie temperatures. This means that three-dimensional recording becomes possible by adjusting the laser power when writing. In addition, we have demonstrated the principle of 3D recording through recording simulations, using a media model that mimics the microstructure and magnetic properties of the fabricated media.

The three-dimensional magnetic recording method can increase recording capacity by stacking recording layers in three dimensions. This means that more digital information can be stored with fewer HDDs, leading to energy savings for data centers. In the future, we plan to develop processes to reduce the size of FePt grains, to improve the orientation and magnetic anisotropy, and to stack more FePt layers to realize a media structure suitable for practical use as a high-density HDD.


Story Source:

Materials provided by National Institute for Materials Science, Japan. Note: Content may be edited for style and length.


Journal Reference:

  1. P. Tozman, S. Isogami, I. Suzuki, A. Bolyachkin, H. Sepehri-Amin, S.J. Greaves, H. Suto, Y. Sasaki, T.Y. Chang, Y. Kubota, P. Steiner, P.W. Huang, K. Hono, Y.K. Takahashi. Dual-layer FePt-C granular media for multi-level heat-assisted magnetic recording. Acta Materialia, 2024; 271: 119869 DOI: 10.1016/j.actamat.2024.119869

Cite This Page:

National Institute for Materials Science, Japan. "Proof-of-principle demonstration of 3-D magnetic recording." ScienceDaily. ScienceDaily, 8 April 2024. <www.sciencedaily.com/releases/2024/04/240408130543.htm>.
National Institute for Materials Science, Japan. (2024, April 8). Proof-of-principle demonstration of 3-D magnetic recording. ScienceDaily. Retrieved May 24, 2024 from www.sciencedaily.com/releases/2024/04/240408130543.htm
National Institute for Materials Science, Japan. "Proof-of-principle demonstration of 3-D magnetic recording." ScienceDaily. www.sciencedaily.com/releases/2024/04/240408130543.htm (accessed May 24, 2024).

Explore More

from ScienceDaily

RELATED STORIES