Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > New NIST microscope measures nanomagnet property vital to 'spintronics'

Abstract:
Researchers at the National Institute of Standards and Technology (NIST) have developed a new microscope able to view and measure an important but elusive property of the nanoscale magnets used in an advanced, experimental form of digital memory. The new instrument already has demonstrated its utility with initial results that suggest how to limit power consumption in future computer memories.

video platformvideo managementvideo solutionsvideo player

Animation of spin waves excited by a transient magnetic field pulse in a nanomagnet, as simulated with NIST micromagnetics software (Object Oriented MicroMagnetic Framework, or OOMMF).

Credit: Boone/NIST

New NIST microscope measures nanomagnet property vital to 'spintronics'

Boulder, CO | Posted on March 15th, 2013

NIST's heterodyne magneto-optic microwave microscope, or H-MOMM, can measure collective dynamics of the electrons' spins—the basic phenomenon behind magnetism—in individual magnets as small as 100 nanometers in diameter. Nanomagnets are central components of low-power, high-speed "spintronic" computer memory, which might soon replace conventional random-access memory. Spintronics relies on electrons behaving like bar magnets, pointing in different directions to manipulate and store data, whereas conventional electronics rely on charge.

"The measurement technique is entirely novel, the capability that it has enabled is unprecedented, and the scientific results are groundbreaking," project leader Tom Silva says.

As described in a new paper,* NIST researchers used the H-MOMM to quantify, for the first time, the spin relaxation process—or damping—in individual nanomagnets. Spin relaxation is related to how much energy is required to switch a unit of spintronic memory between a 0 and a 1 (the bits used to represent data).

The nanomagnets used in experimental spintronic systems are too big to yield their secrets to conventional atomic physics tools yet too small for techniques used with bulk materials. Until now, researchers have been forced to measure the average damping from groups of nanomagnets. The new microscope enabled NIST researchers to study, in detail, the ups and downs of spin excitation in individual magnets made of a layer of a nickel-iron alloy on a sapphire base.

The H-MOMM combines optical and microwave techniques. Two green laser beams are merged to generate microwaves, which excite "spin waves"—magnetic oscillations that vary with position across an individual nanomagnet, like waves in a bathtub. Polarized light from one laser is used to analyze the excitation pattern. By measuring excitation as a function of magnetic field and microwave frequency, researchers can deduce the damping of various spin waves in each nanomagnet.

Measurement and control of magnetic damping is crucial for spintronics, because the smaller the damping, the less energy is required to store a bit of data, and the less power a device requires to operate. The NIST study suggests that designing spintronic devices to have uniform spin waves could dramatically reduce the energy required to write a bit.

The new microscope is one outcome of an ongoing NIST effort to develop methods for measuring defects in magnetic nanostructures. At extremely small scales, defects dominate and can disrupt magnetic device behavior, resulting in errors in reading and writing information.

####

About National Institute of Standards and Technology (NIST)
The National Institute of Standards and Technology (NIST) is an agency of the U.S. Department of Commerce.

For more information, please click here

Contacts:
Laura Ost

303-497-4880

Copyright © National Institute of Standards and Technology (NIST)

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

* H.T. Nembach, J.M. Shaw, C.T. Boone and T.J. Silva. Mode- and size-dependent Landau-Lifshitz damping in magnetic nanostructures: Evidence for non-local damping. Physical Review Letters. 110, 117201. Published March 12, 2013.

Related News Press

News and information

Feynman Prize Winners Announced! April 26th, 2015

New ASTM Standards Will Help Educate Present and Future Nanotechnology Workforces April 26th, 2015

Heat makes electrons’ spin in magnetic superconductors April 26th, 2015

QD Vision Wins 2015 Bronze Edison Award for Color IQ™ Quantum Dot Technology April 26th, 2015

Imaging

Fast and accurate 3-D imaging technique to track optically trapped particles April 24th, 2015

ORNL reports method that takes quantum sensing to new level April 23rd, 2015

A silver lining: UCSB researchers cradle silver nanoclusters inside synthetic DNA to create a programmed, tunable fluorescent array April 23rd, 2015

Richards-Kortum elected to American Academy of Arts and Sciences: April 22nd, 2015

Laboratories

ORNL reports method that takes quantum sensing to new level April 23rd, 2015

Scientists Use Nanoscale Building Blocks and DNA 'Glue' to Shape 3D Superlattices: New approach to designing ordered composite materials for possible energy applications April 23rd, 2015

Phonons, arise! Small electric voltage alters conductivity in key materials April 22nd, 2015

Videos/Movies

Quantum 'paparazzi' film photons in the act of pairing up April 22nd, 2015

New class of 3D-printed aerogels improve energy storage April 22nd, 2015

Govt.-Legislation/Regulation/Funding/Policy

SEFCU, SUNY Poly CNSE Announce Winning Student-Led Teams in the 6th Annual $500,000 New York Business Plan Competition April 25th, 2015

Northwestern scientists develop first liquid nanolaser: Technology could lead to new way of doing 'lab on a chip' medical diagnostics April 25th, 2015

ORNL reports method that takes quantum sensing to new level April 23rd, 2015

Electron spin brings order to high entropy alloys April 23rd, 2015

Spintronics

Heat makes electrons’ spin in magnetic superconductors April 26th, 2015

Drexel materials scientists putting a new spin on computing memory April 22nd, 2015

On the road to spin-orbitronics: Berkeley Lab researchers find new way to manipulate magnetic domain walls April 13th, 2015

Graphene looking promising for future spintronic devices April 10th, 2015

Discoveries

Heat makes electrons’ spin in magnetic superconductors April 26th, 2015

SEFCU, SUNY Poly CNSE Announce Winning Student-Led Teams in the 6th Annual $500,000 New York Business Plan Competition April 25th, 2015

Northwestern scientists develop first liquid nanolaser: Technology could lead to new way of doing 'lab on a chip' medical diagnostics April 25th, 2015

Fast and accurate 3-D imaging technique to track optically trapped particles April 24th, 2015

Announcements

Feynman Prize Winners Announced! April 26th, 2015

New ASTM Standards Will Help Educate Present and Future Nanotechnology Workforces April 26th, 2015

Heat makes electrons’ spin in magnetic superconductors April 26th, 2015

QD Vision Wins 2015 Bronze Edison Award for Color IQ™ Quantum Dot Technology April 26th, 2015

Tools

Fast and accurate 3-D imaging technique to track optically trapped particles April 24th, 2015

ORNL reports method that takes quantum sensing to new level April 23rd, 2015

Quantum 'paparazzi' film photons in the act of pairing up April 22nd, 2015

Richards-Kortum elected to American Academy of Arts and Sciences: April 22nd, 2015

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More










ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project