Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

A novel approach to create high-density magnetic data storage

29.01.2009
In order to achieve higher storage densities on computer disks, the last decades were dominated by optimization of magnetic materials, i.e. the magnetic particles (grains) were gradually shrunk while, at the same time, the magnetic stability (magnetic anisotropy) was increased.

Usually, about 100 to 600 grains form one bit, i.e. the nowadays smallest storage unit. Each grain is about 10 nanometers in size. These grains are arranged next to each other on glass substrates that are plated with cobalt, chrome, and platinum.

Both the size and amount of the grains necessary for one bit could not be decreased further without decreasing the signal/noise ratio. Weaker signals could even be accompanied by loss of information. Therefore, new concepts of magnetic storage have to be found.

Physicists from the research centre Forschungszentrum Dresden-Rossendorf / FZD (Germany), the Universidad Autonoma de Barcelona (Spain) and further research institutions were able to generate magnetic areas which promise to overcome the obstacles of today’s data storage technology. Using a highly focused ion beam, i.e. fast charged atoms, they irradiated an iron-aluminum alloy in such a way that only the treated zones became ferromagnetic. As the ion beam is focused to a size of only a few nanometers and the ion dose is rather low, the created nanozones are extremely flat and significantly less than 100 nanometers in diameter.

The read/write heads of personal computer disks fly above the hard disks at a distance of 20 nanometers. Conventional technologies for structuring material surfaces on the nanoscale result in corrugated surfaces. These technologies are not suitable for hard disks because the generated bumpy nanostructures would interfere with the read/write heads and might finally destroy the disk.

The new superflat nanomagnets, however, fulfill all requirements concerning a new concept for magnetic data storage. In the future, each of these nanomagnets could serve as one bit, provided that they could be produced in parallel on large areas via lithographic techniques, and shrunk in size down to about 30 nanometers. “We are now working on the magnetic stability of our nanomagnets. Its increase would be a further step with respect to future industrial exploitation”, says Dr. Jürgen Fassbender, scientist at FZD.

Further information:
Dr. Jürgen Fassbender
Institute of Ion-Beam Physics and Materials Research
Forschungszentrum Dresden-Rossendorf (FZD)
Phone: ++49 351 260 - 3096
Email: j.fassbender@fzd.de
Contact to the media:
Dr. Christine Bohnet
Public Relations
Forschungszentrum Dresden-Rossendorf (FZD)
Bautzner Landstr. 400, 01328 Dresden, Germany
Tel.: ++49 351 260 - 2450 or ++49 160 969 288 56
Fax: ++49 351 260 - 2700
Email : presse@fzd.de

Christine Bohnet | alfa
Further information:
http://www.fzd.de
http://www3.interscience.wiley.com/journal/121571544/abstract

More articles from Physics and Astronomy:

nachricht Applicability of dynamic facilitation theory to binary hard disk systems
08.12.2016 | Nagoya Institute of Technology

nachricht Will Earth still exist 5 billion years from now?
08.12.2016 | KU Leuven

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Significantly more productivity in USP lasers

In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.

Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...

Im Focus: Shape matters when light meets atom

Mapping the interaction of a single atom with a single photon may inform design of quantum devices

Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

Im Focus: MADMAX: Max Planck Institute for Physics takes up axion research

The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.

The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

Closing the carbon loop

08.12.2016 | Life Sciences

Applicability of dynamic facilitation theory to binary hard disk systems

08.12.2016 | Physics and Astronomy

Scientists track chemical and structural evolution of catalytic nanoparticles in 3-D

08.12.2016 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>