Navigation Links
Nanoscale magnetic media diagnostics by rippling spin waves
Date:4/3/2012

Memory devices based on magnetism are one of the core technologies of the computing industry, and engineers are working to develop new forms of magnetic memory that are faster, smaller, and more energy efficient than today's flash and SDRAM memory. They now have a new tool developed by a team from the National Institute of Standards and Technology (NIST), the University of Maryland Nanocenter and the Royal Institute of Technology in Swedena method to detect defects in magnetic structures as small as a tenth of a micrometer even if the region in question is buried inside a multilayer electronic device.*

The technique demonstrated at the NIST Center for Nanoscale Technology (CNST) builds on work by researchers at the Ohio State University.** The idea is to trap and image oscillating perturbations of a magnetic field"spin waves"in a thin film. Trapped spin waves provide scientists with a powerful new tool to nondestructively measure the properties of magnetic materials and search for nanoscale defects that could or have caused memory failures, especially in multilayer magnetic systems like a typical hard drive, where defects could be buried beneath the surface.

According to NIST researcher Robert McMichael, when left alone, the material's magnetization is like the surface of a pond on a windless day. The pond is comprised of smaller magnetic moments that come with the quantum mechanical "spin" of electrons. Tap the surface of the pond with a piece of driftwood, or microwaves in this case, and the surface will begin to ripple with spin waves as the microwave energy jostles the spins, which, in turn, jostle their neighbors.

"The trick we play is to tune the microwaves to a frequency just outside the band where the spin waves can propagateexcept right under our magnetic probe tip," says McMichael. "It's like the pond is frozen except for a little melted spot that we can move around to check magnetic properties at different spots in the sample."

The trapped spin waves are disturbed by defects in the material, and this effect allows the defects to be characterized on 100 nm length scales.

Previous work had shown this same effect in magnetic spins that were oriented perpendicular to the magnetic film surface, meaning that the individual spins coupled strongly with their neighbors, which limited the resolution. This new work adds the extra feature that the magnetic spins are aligned in plane with one another and are not as tightly coupled. This setup is not only more representative of how many magnetic devices would be structured, but also allows for tighter focusing and better resolution.


'/>"/>

Contact: Mark Esser
mark.esser@nist.gov
301-975-8735
National Institute of Standards and Technology (NIST)
Source:Eurekalert  

Related biology technology :

1. Solved: The mystery of the nanoscale crop circles
2. Magnetic actuation enables nanoscale thermal analysis
3. ORNL experiments prove nanoscale metallic conductivity in ferroelectrics
4. Carving at the nanoscale
5. Penn and Brown researchers demonstrate earthquake friction effect at the nanoscale
6. Wideband Antenna for Novelda Nanoscale Impulse Radar
7. Stanford engineers create nanoscale nonlinear light source
8. $13-million NSF center to explore new ways to manipulate light at the nanoscale
9. Nanoscale spin waves can replace microwaves
10. ONR funds study of nanoscale wetting dynamics of superhydrophobic surfaces at Stevens
11. Tiny wires change behavior at nanoscale
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Nanoscale magnetic media diagnostics by rippling spin waves
(Date:10/11/2017)... ... 2017 , ... Personal eye wash is a basic first aid supply for any work environment, ... eye do you rinse first if a dangerous substance enters both eyes? It’s one less ... with its unique dual eye piece. , “Whether its dirt and debris, or an acid ...
(Date:10/11/2017)... (PRWEB) , ... October 11, 2017 , ... ... pathology, announced today it will be hosting a Webinar titled, “Pathology is going ... Pathology Associates , on digital pathology adoption best practices and how Proscia improves ...
(Date:10/11/2017)... and LAGUNA HILLS, Calif. , ... of Cancer Research, London (ICR) and ... with SKY92, SkylineDx,s prognostic tool to risk-stratify patients with multiple ... as MUK nine . The University of ... is partly funded by Myeloma UK, and ICR will perform ...
(Date:10/11/2017)... , ... October 11, 2017 , ... ... the implantation and pregnancy rates in frozen and fresh in vitro fertilization ... progesterone and maternal age to IVF success. , After comparing the results from ...
Breaking Biology Technology:
(Date:4/24/2017)... 24, 2017 Janice Kephart , ... Identity Strategy Partners, LLP (IdSP) , today issues ... President Trump,s March 6, 2017 Executive Order: ... vetting can be instilled with greater confidence, enabling ... all refugee applications are suspended by until at ...
(Date:4/17/2017)... -- NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" or ... 2016 Annual Report on Form 10-K on Thursday April 13, 2017 ... ... Investor Relations section of the Company,s website at http://www.nxt-id.com  under ... http://www.sec.gov . 2016 Year Highlights: ...
(Date:4/11/2017)... 11, 2017 Crossmatch®, a globally-recognized leader ... today announced that it has been awarded a ... Activity (IARPA) to develop next-generation Presentation Attack Detection ... "Innovation has been a driving force within Crossmatch ... allow us to innovate and develop new technologies ...
Breaking Biology News(10 mins):