High-capacity tape for the period of huge knowledge

It could appear odd to some that within the yr 2020, magnetic tape is being mentioned as a storage medium for digital knowledge. After all, it has not been widespread in dwelling computing for the reason that 1980s. Surely the one related mediums right this moment are stable state drives and Blu-ray discs? However, in knowledge facilities all over the place, at universities, banks, web service suppliers or authorities places of work, you’ll find that digital tapes should not solely widespread, however important.

Though they’re slower to entry than different storage gadgets, similar to onerous disk drives and stable state reminiscence, digital tapes have very excessive storage densities. More data might be stored on a tape than different gadgets of comparable sizes, they usually may also be less expensive too. So for data-intensive functions similar to archives, backups and something lined by the broad time period large knowledge, they’re extraordinarily necessary. And as demand for these functions will increase, so does the demand for high-capacity digital tapes.

Professor Shin-ichi Ohkoshi from the Department of Chemistry on the University of Tokyo and his staff have developed a magnetic materials which, along with a particular course of to entry it, can provide better storage densities than ever. The sturdy nature of the fabric implies that the info would final for longer than with different mediums, and the novel course of operates at low energy. As an added bonus, this method would even be very low-cost to run.

“Our new magnetic material is called epsilon iron oxide, it is particularly suitable for long-term digital storage,” mentioned Ohkoshi. “When data is written to it, the magnetic states that represent bits become resistant to external stray magnetic fields that might otherwise interfere with the data. We say it has a strong magnetic anisotropy. Of course, this feature also means that it is harder to write the data in the first place; however, we have a novel approach to that part of the process too.”

The recording course of depends on high-frequency millimeter waves within the area of 30-300 gigahertz, or billions of cycles per second. These excessive frequency waves are directed at strips of epsilon iron oxide, which is a wonderful absorber of such waves. When an exterior magnetic discipline is utilized, the epsilon iron oxide permits its magnetic course, which represents both a binary 1 or 0, to flip within the presence of the high-frequency waves. Once the tape has handed by the recording head the place this takes place, the info is then locked into the tape till it’s overwritten.

“This is how we overcome what is called in the data science field ‘the magnetic recording trilemma,'” mentioned Project Assistant Professor Marie Yoshikiyo, from Ohkoshi’s laboratory. “The trilemma describes how, to increase storage density, you need smaller magnetic particles, but the smaller particles come with greater instability and the data can easily be lost. So we had to use more stable magnetic materials and produce an entirely new way to write to them. What surprised me was that this process could also be power efficient too.”

Epsilon iron oxide may additionally discover makes use of past magnetic recording tape. The frequencies it absorbs nicely for recording functions are additionally the frequencies which are meant to be used in next-generation mobile communication applied sciences past 5G. So within the not too distant future if you find yourself accessing a web site in your 6G smartphone, each it and the info heart behind the web site could very nicely be making use of epsilon iron oxide.

“We knew early on that millimeter waves should theoretically be capable of flipping magnetic poles in epsilon iron oxide. But since it’s a newly observed phenomenon, we had to try various methods before finding one that worked,” mentioned Ohkoshi. “Although the experiments were very difficult and challenging, the sight of the first successful signals was incredibly moving. I anticipate we will see magnetic tapes based on our new technology with 10 times the current capacities within five to 10 years.”

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Journal article

Shin-ichi Ohkoshi, Marie Yoshikiyo, Kenta Imoto, Kosuke Nakagawa, Asuka Namai, Hiroko Tokoro,Yuji Yahagi, Kyohei Takeuchi, Fangda Jia, Seiji Miyashita, Makoto Nakajima, Hongsong Qiu, Kosaku Kato, Takehiro Yamaoka, Masashi Shirata, Kenji Naoi, Koichi Yagishita, and Hiroaki Doshita. Magnetic pole flip by millimeter wave. Advanced Materials

DOI: 10.1002/adma.202004897

https://onlinelibrary.wiley.com/doi/10.1002/adma.202004897

This analysis is supported by “Advanced Research Program for Energy and Environmental Technologies” venture commissioned by NEDO (grant quantity P14004), JSPS Grants-in-Aid for specifically promoted Research (grant quantity 15H05697), JSPS Grants-in-Aid for Scientific Research (A) (grant quantity 20H00369), JSPS KAKENHI (grant numbers 16H06521, 18Okay03444, and 20H02206), Elements Strategy Initiative Center for Magnetic Materials (ESICMM) of MEXT (grant quantity 12016013), JSPS Grant-in-Aid for Scientific Research on Innovative Area Soft Crystals (space quantity 2903, grant quantity 17H06367)

Useful hyperlinks

Ohkoshi Laboratory – http://www.chem.s.u-tokyo.ac.jp/users/ssphys/english/index.html

Graduate School of Science – https://www.s.u-tokyo.ac.jp/en/

https://www.s.u-tokyo.ac.jp/en/press/2020/7057/

Research contact

Professor Shin-ichi Ohkoshi

Department of Chemistry, School of Science, The University of Tokyo,

7-3-1 Hongo, Bunkyo-ku, 113-0033 Tokyo, Japan

Tel: +81(0)-3-5841-4333

Email: ohkoshi@chem.s.u-tokyo.ac.jp

Press Contact

Mr. Rohan Mehra

Division for Strategic Public Relations, The University of Tokyo

7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8654, JAPAN

Tel: +81-(0)80-9707-8450

Email: press-releases.adm@gs.mail.u-tokyo.ac.jp

About the University of Tokyo

The University of Tokyo is Japan’s main college and one of many world’s prime analysis universities. The huge analysis output of some 6,000 researchers is printed on the earth’s prime journals throughout the humanities and sciences. Our vibrant pupil physique of round 15,000 undergraduate and 15,000 graduate college students contains over 4,000 worldwide college students. Find out extra at http://www.u-tokyo.ac.jp/en/ or comply with us on Twitter at @UTokyo_News_en.

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