Navigation Links
New NIST microscope measures nanomagnet property vital to 'spintronics'
Date:3/15/2013

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.

NIST's heterodyne magneto-optic microwave microscope, or H-MOMM, can measure collective dynamics of the electrons' spinsthe basic phenomenon behind magnetismin 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 processor dampingin 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.


'/>"/>

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

Related biology technology :

1. Gated STED -- developing the next generation of super-resolution microscopes
2. York researchers create tornados inside electron microscopes
3. Electron microscopes with a twist
4. Optical microscopes lend a hand to graphene research
5. Cellphone Microscope Inventor Honored with Biophotonics Technology Innovator Award
6. New York Microscope Company Adds Seiler Line of Microscopes
7. New York Microscope Launches New Website http://www.NYscopes.com
8. Nations Best Health Care Organizations for Patient Satisfaction, Core Measures Honored by Press Ganey
9. A giant step in a miniature world: UZH researcher measures the electrical charge of nano particles
10. New metamaterial allows transmission gain while retaining negative refraction property
11. Intellectual Property Lawyer Available for Comment on Recent Supreme Court Ruling
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/21/2017)... ... February 21, 2017 , ... During ... connected digital health applications, announced a partnership with Redox, a leader in cloud-based ... to many clinical systems while keeping data secure in the cloud. , The ...
(Date:2/21/2017)... ... February 21, 2017 , ... ... Treximo will pair its $200M operational capacity with its strategic internal leadership ... in areas affecting quality and operational management. With office locations in ...
(Date:2/21/2017)... , Feb. 21, 2017   Logicalis Healthcare Solutions ... IT solutions and managed services provider ( www.us.logicalis.com ), ... Desk for Epic. The new service will help hospital ... resources by giving physicians, nurses and other clinicians immediate ... tier-one support. This will allow hospital IT staff to ...
(Date:2/20/2017)... - BioAmber Inc. (NYSE: BIOA ) announced today that Jean-Francois ... the company,s COO, has been named President, effective immediately.  ... Fabrice has overseen the construction, start-up and operation of the manufacturing ... the Mitsui JV.  Fabrice has also been extensively involved in the ... ...
Breaking Biology Technology:
(Date:2/16/2017)... 16, 2017  Genos, a community for personal ... has received Laboratory Accreditation from the College of ... to laboratories that meet stringent requirements around quality, ... processes. "Genos is committed to maintaining ... We,re honored to be receiving CAP accreditation," said ...
(Date:2/13/2017)... , Feb. 13, 2017  RSA Conference -- ... platform that is designed to enhance fraud detection ... release in the RSA Fraud & Risk Intelligence ... organizations to leverage additional insights from internal and ... to better protect their customers from targeted cybercrime ...
(Date:2/10/2017)... DUBLIN , Feb 10, 2017 ... PharmaBiotech,s new report "Personalized Medicine - Scientific and Commercial ... ... in personalized medicine. Diagnosis is integrated with therapy for selection ... emphasis on early detection and prevention of disease in modern ...
Breaking Biology News(10 mins):