Navigation Links
Capture of nanomagnetic 'fingerprints' a boost for next-generation information storage media
Date:1/29/2009

In the race to develop the next generation of storage and recording media, a major hurdle has been the difficulty of studying the tiny magnetic structures that will serve as their building blocks. Now a team of physicists at the University of California, Davis, has developed a technique to capture the magnetic "fingerprints" of certain nanostructures even when they are buried within the boards and junctions of an electronic device. This breakthrough in nanomagnetism was published in the Jan. 19 issue of Applied Physics Letters.

The past decade has witnessed a thousand-fold increase in magnetic recording area density, which has revolutionized the way information is stored and retrieved. These advances are based on the development of nanomagnet arrays which take advantage of the new field of spintronics: using electron spin as well as charge for information storage, transmission and manipulation.

But due to the miniscule physical dimensions of nanomagnets some are as small as 50 atoms wide observing their magnetic configurations has been a challenge, especially when they are not exposed but built into a functioning device.

"You can't take full advantage of these nanomagnets unless you can 'see' and understand their magnetic structures not just how the atoms and molecules are put together, but how their electronic and magnetic properties vary accordingly," said Kai Liu, a professor and Chancellor's Fellow in physics at UC Davis. "This is difficult when the tiny nanomagnets are embedded and when there are billions of them in a device."

To tackle this challenge, Liu and three of his students, Jared Wong, Peter Greene and Randy Dumas, created copper nanowires embedded with magnetic cobalt nanodisks. Then they applied a series of magnetic fields to the wires and measured the responses from the nanodisks. By starting each cycle at full saturation that is, using a field strong enough to align all the nanomagnets then applying a progressively more negative field with each reversal, they created a series of information-rich graphic patterns known to physicists as "first-order reversal curve (FORC) distributions."

"Each pattern tells us a different story about what's going on inside the nanomagnets," Liu said. "We can see how they switch from one alignment to another, and get quantitative information about how many nanomagents are in one particular phase: for example, whether the magnetic moments are all pointing in the same direction or curling around a disk to form vortices. This in turn tells us how to encode information with these nanomagnets."

The technique will be applicable to a wide variety of physical systems that exhibit the kind of lag in response time (or hysteresis) as magnets, including ferroelectric, elastic and superconducting materials, Liu explained. "It's a powerful tool for probing variations, or heterogeneity, in the system, and real materials always have a certain amount of this."


'/>"/>

Contact: Liese Greensfelder
lgreensfelder@ucdavis.edu
530-752-6101
University of California - Davis
Source:Eurekalert  

Related biology technology :

1. Biological electron transfer captured in real time
2. AbelsonTaylor Captures DTC Gold
3. Oral Drug From Novartis/Mitsubishi Tanabe Will Capture the Largest Market Share of All Emerging Multiple Sclerosis Therapies in 2017
4. ProMetic Further Confirms Performance of Prion Capture Resin at the Recovery of Biological Products Conference
5. Flexible nanoantenna arrays capture abundant solar energy
6. Akaza Research Releases New Version of OpenClinica Electronic Data Capture (EDC) Software; Targets Industry Clinical Trials
7. New solar energy material captures every color of the rainbow
8. T-System Releases The T SystemEV(R) 2.6.3, Featuring New Meds/Allergies Notification, Automated Charge Capture
9. OmniComm Systems, Inc. Is Fueled by Another Strong Quarter Delivering Electronic Data Capture (EDC) Solutions & Services
10. Fingerprints provide clues to more than just identity
11. Fingerprints provide clues to more than just identity
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Capture of nanomagnetic 'fingerprints' a boost for  next-generation information storage media
(Date:5/25/2016)... ... May 25, 2016 , ... Founder of the Fitzmaurice Hand ... and surgery of the hand by the National Board of Physicians and Surgeons, ... and beyond in his pursuit of providing the most comprehensive, effective treatment for ...
(Date:5/25/2016)... ... May 25, 2016 , ... Lady had been battling arthritis ... cruciate ligament in her left knee. Lady’s owner Hannah sought the help of Dr ... veterinary surgeon, to repair her cruciate ligament and help with the pain of Lady’s ...
(Date:5/24/2016)... ... May 24, 2016 , ... Last week, Callan Capital, an integrated wealth management ... The Future of San Diego Life Science event at the Estancia La Jolla Resort ... the event with speakers Dr. Rich Heyman, former CEO of Aragon and Seragon, and ...
(Date:5/23/2016)... , May 23, 2016 Zimmer Biomet Holdings, ... healthcare, today announced that its Board of Directors has approved ... the second quarter of 2016. The cash ... about July 29, 2016 to stockholders of record as of ... of dividends are subject to approval of the Board of ...
Breaking Biology Technology:
(Date:3/22/2016)... PROVO and SANDY, Utah ... (NSO), which operates the highest sample volume laboratory in ... Tute Genomics and UNIConnect, leaders in clinical sequencing informatics ... the launch of a project to establish the informatics ... NSO has been contracted by the ...
(Date:3/18/2016)... -- --> --> Competitive ... Unmanned Vehicles, Physical infrastructure and Perimeter Surveillance & Detection Systems ... security market and the continuing migration crisis in the ... has led visiongain to publish this unique report, which ... defence & security companies in the border security market ...
(Date:3/15/2016)... , March 15, 2016 --> ... published by Transparency Market Research "Digital Door Lock Systems Market ... 2015 - 2023," the global digital door lock systems market ... in 2014 and is forecast to grow at a CAGR ... micro, small and medium enterprises (MSMEs) across the world and ...
Breaking Biology News(10 mins):