Navigation Links
Good eggs: NIST nanomagnets offer food for thought about computer memories
Date:4/27/2011

Magnetics researchers at the National Institute of Standards and Technology (NIST) colored lots of eggs recently. Bunnies and children might find the eggs a bit smallin fact, too small to see without a microscope. But these "eggcentric" nanomagnets have another practical use, suggesting strategies for making future low-power computer memories.

For a study described in a new paper,* NIST researchers used electron-beam lithography to make thousands of nickel-iron magnets, each about 200 nanometers (billionths of a meter) in diameter. Each magnet is ordinarily shaped like an ellipse, a slightly flattened circle. Researchers also made some magnets in three different egglike shapes with an increasingly pointy end. It's all part of NIST research on nanoscale magnetic materials, devices and measurement methods to support development of future magnetic data storage systems.

It turns out that even small distortions in magnet shape can lead to significant changes in magnetic properties. Researchers discovered this by probing the magnets with a laser and analyzing what happens to the "spins" of the electrons, a quantum property that's responsible for magnetic orientation. Changes in the spin orientation can propagate through the magnet like waves at different frequencies. The more egg-like the magnet, the more complex the wave patterns and their related frequencies. (Something similar happens when you toss a pebble in an asymmetrically shaped pond.) The shifts are most pronounced at the ends of the magnets.

To confirm localized magnetic effects and "color" the eggs, scientists made simulations of various magnets using NIST's object-oriented micromagnetic framework (OOMMF).** (See graphic.) Lighter colors indicate stronger frequency signals.

The egg effects explain erratic behavior observed in large arrays of nanomagnets, which may be imperfectly shaped by the lithography process. Such distortions can affect switching in magnetic devices. The egg study results may be useful in developing random-access memories (RAM) based on interactions between electron spins and magnetized surfaces. Spin-RAM is one approach to making future memories that could provide high-speed access to data while reducing processor power needs by storing data permanently in ever-smaller devices. Shaping magnets like eggs breaks up a symmetric frequency pattern found in ellipse structures and thus offers an opportunity to customize and control the switching process.

"For example, intentional patterning of egg-like distortions into spinRAM memory elements may facilitate more reliable switching," says NIST physicist Tom Silva, an author of the new paper.

"Also, this study has provided the Easter Bunny with an entirely new market for product development."


'/>"/>

Contact: Laura Ost
laura.ost@nist.gov
303-497-4880
National Institute of Standards and Technology (NIST)
Source:Eurekalert  

Related biology technology :

1. Nanomagnets guide stem cells to damaged tissue
2. Heavy metals open path to high temperature nanomagnets
3. Microbes, Inc. Extends Warrant Tender Offer
4. SCAN Health Plan Offers Seniors Five Tips to Prepare for Surgery
5. StollerUSA Launches Bio-Forge.com to Offer Solutions for Crops Under Stress
6. BioInformatics, LLC Offers Solutions for Optimizing Service and/or Maintenance Contracts
7. Shire Announces Holding of 81% in Jerini AG and Publication of Offer Document
8. SGX - Lilly Merger Offer Receives Positive Opinions From Proxy Advisory Firms
9. Minnesota Chiropractic Association Offers Backpack Safety Checklist
10. GSI Group Accepts Shares in Tender Offer for Excel Technology and Commences Subsequent Offering Period
11. Angiotech Announces Extension of the Expiration Date of its Tender Offer for Senior Floating Rate Notes Due 2013 and 7.75% Senior Subordinated Notes Due 2014
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Good eggs: NIST nanomagnets offer food for thought about computer memories
(Date:1/19/2017)... ... January 19, 2017 , ... ... and development (R&D), today announced the launch of Data Science Services ... the rapidly evolving field of precision medicine. , Data Science Services ...
(Date:1/19/2017)... Jan. 19, 2017  ArmaGen, Inc., today announced ... Ph.D., as chief executive officer, as well as ... brings to ArmaGen more than 17 years of ... development of biotherapeutics and pharmaceuticals. ... diverse experience and skillset necessary to lead ArmaGen ...
(Date:1/19/2017)... , ... January 18, 2017 , ... ... tech innovators, engineers, and scientists from around the world, was today awarded the ... awards program is based entirely on merit and decided upon by a dedicated ...
(Date:1/19/2017)... 18, 2017 The global biotechnology services ... billion by 2025, according to a new report ... been adaptive of the function of outsourcing certain ... Among the services outsourced, clinical trial management and ... & Johnson was the first pharmaceutical company to ...
Breaking Biology Technology:
(Date:12/16/2016)... --  IdentyTechSolutions America LLC , a leading provider ... a cutting-edge manufacturer of software and hardware security ... integrated solutions that comprise IDT biometric readers and ... IdentyTech,s customers with combined physical identification and anti-tailgating ... theft. "We are proud to use ...
(Date:12/15/2016)... Dec 15, 2016 ... Research and Markets has announced the addition of ... The report forecasts the global military biometrics market to ... The report has been prepared based on an in-depth market analysis ... its growth prospects over the coming years. The report also includes a ...
(Date:12/8/2016)... Dec. 8, 2016 Market Research Future published a half ... global Mobile Biometric Security and Service Market is expected to grow ... Market Highlights: ... , Mobile Biometric Security and ... the increasing need of authentication and security from unwanted cyber threats. ...
Breaking Biology News(10 mins):