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:10/10/2017)... ... 10, 2017 , ... USDM Life Sciences , the ... sciences and healthcare industries, announces a presentation by Subbu Viswanathan and Jennifer Jaye ... GxP Validation for Agile Cloud Platforms,” will present a revolutionary approach to achieving ...
(Date:10/9/2017)... N.C. (PRWEB) , ... October 09, 2017 , ... At ... announced Dr. Christopher Stubbs, a professor in Harvard University’s Departments of Physics and Astronomy, ... Stubbs was a member of the winning team for the 2015 Breakthrough Prize in ...
(Date:10/7/2017)... Seattle, WA (PRWEB) , ... ... ... the industry leader in Hi-C-based genomic technologies, launched its ProxiMeta™ Hi-C metagenome ... the ProxiMeta Hi-C kit and accompanying cloud-based bioinformatics software to perform Hi-C ...
(Date:10/5/2017)... ... ... LabRoots , the leading provider of educational and interactive virtual events ... cancer research with a month-long promotion supporting the advancement of breast cancer research with ... promo code PinkRibbon to get 10 percent off their purchase of every the “Cancer ...
Breaking Biology Technology:
(Date:5/16/2017)... 16, 2017  Veratad Technologies, LLC ( www.veratad.com ), ... and identity verification solutions, announced today they will participate ... May 15 thru May 17, 2017, in ... Trade Center. Identity impacts the lives ... today,s quickly evolving digital world, defining identity is critical ...
(Date:5/6/2017)... SINGAPORE , May 5, 2017 ... has just announced a new breakthrough in biometric ... that exploits quantum mechanical properties to perform ... new smart semiconductor material created by Ram Group ... across finance, entertainment, transportation, supply chains and security. ...
(Date:4/19/2017)... , April 19, 2017 ... its vendor landscape is marked by the presence of ... is however held by five major players - 3M ... these companies accounted for nearly 61% of the global ... leading companies in the global military biometrics market boast ...
Breaking Biology News(10 mins):