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 Unraveling the nature of 'whistlers' from space in the lab
15.08.2018 | American Institute of Physics

nachricht Early opaque universe linked to galaxy scarcity
15.08.2018 | University of California - Riverside

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: Unraveling the nature of 'whistlers' from space in the lab

A new study sheds light on how ultralow frequency radio waves and plasmas interact

Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...

Im Focus: New interactive machine learning tool makes car designs more aerodynamic

Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.

When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...

Im Focus: Robots as 'pump attendants': TU Graz develops robot-controlled rapid charging system for e-vehicles

Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.

Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....

Im Focus: The “TRiC” to folding actin

Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.

Actin is the most abundant protein in highly developed cells and has diverse functions in processes like cell stabilization, cell division and muscle...

Im Focus: Lining up surprising behaviors of superconductor with one of the world's strongest magnets

Scientists have discovered that the electrical resistance of a copper-oxide compound depends on the magnetic field in a very unusual way -- a finding that could help direct the search for materials that can perfectly conduct electricity at room temperatur

What happens when really powerful magnets--capable of producing magnetic fields nearly two million times stronger than Earth's--are applied to materials that...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Within reach of the Universe

08.08.2018 | Event News

A journey through the history of microscopy – new exhibition opens at the MDC

27.07.2018 | Event News

2018 Work Research Conference

25.07.2018 | Event News

 
Latest News

Staying in Shape

16.08.2018 | Life Sciences

Diving robots find Antarctic seas exhale surprising amounts of carbon dioxide in winter

16.08.2018 | Earth Sciences

Protein droplets keep neurons at the ready and immune system in balance

16.08.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>