A vertical slice of the internal magnetic structure of a sample section. The sample is 0.005 millimetres (5 microns) in diameter and the section shown here is 0.0036 millimetres (3.6 microns) high. The internal magnetic structure is represented by arrows for a vertical slice within it. In addition, the colour of the arrows indicates whether they are pointing towards (orange) or away from the viewer (purple). Graphics and text: Paul Scherrer Institute/Claire Donnelly
Topics: Atomic Force Microscopy, Atomic Physics, Electromagnetism, Optical Physics, Nanotechnology

Thanks to a technique called hard X-ray magnetic tomography, researchers at the Paul Scherrer Institute (PSI) in Switzerland, the ETH Zurich and the University of Glasgow have succeeded in imaging the magnetization in 3D bulk-like magnets and observe features down to just 100 nm. In particular, they have observed structures known as Bloch points, which were predicted theoretically more than 50 years ago but never actually seen in an experiment until now. The new work could help us better understand the relationship between the magnetic structure and the behaviour and performance of bulk magnets, and so improve the everyday applications in which they are employed.

“Although it was possible to image the arrangement of magnetic moments in 3D before now in films of up to around 200 nm thick using soft X-rays and electrons, it was not possible to study the internal micromagnetic structure of larger, bulk, systems,” explains team member Claire Donnelly of the PSI. “In general, it is not possible to slice down a magnet to investigate its structure because the magnetic configuration will change accordingly. Scientists have tried to overcome this problem in the past using neutron magnetic imaging, but they were only able to achieve a spatial resolution of tens to hundreds of microns using this approach.

“In our new work, we are able to study the internal magnetization within a micron-sized system with 100 nm spatial resolution and observe micromagnetic details within the bulk for the first time.”

The researchers, led by Laura Heyderman, imaged the internal magnetic structure of a micron-sized pillar made of the magnetic material gadolinium-cobalt using hard X-ray magnetic tomography, a technique developed at PSI during the course of this study. “We had to make a number of advances in developing this method,” explains Donnelly. ‘First, we developed hard X-ray magnetic imaging with nanoscale magnetic resolution (this work was published last year). Hard X-rays have a much higher energy than soft X-rays and thus a much larger penetration depth, which allows us to study thicker samples with high spatial resolution.

X-ray nanotomography reveals 3D magnetization structures, Belle Dumé, Nanotechweb.org

Views: 3

Comment

You need to be a member of BlackScienceFictionSociety to add comments!

Join BlackScienceFictionSociety

Badge

Loading…

IMPORTANT ALERTS

ALERT! ALERT! ALERT! 

IF YOU ARE HAVING TROUBLE CHANGING YOUR PROFILE  PICTURE, SWITCH TO EITHER CHROME BROWSWER OR FIREFOX. THERE IS A KNOWN ISSUE WITH INTERNET EXPLORER THAT CAUSES TROUBLE CHANGING PICTURES.


PLEASE DO NOT SIGN IN WITH FACEBOOK IF YOU ALREADY HAVE AN ACCOUNT. YOU WILL CREATE A DUPLICATE THAT WILL NOT HAVE YOUR INFO CONNECTED. THANKS

NO SPAMMING

Please do not greet everyone on the site with large images and/or announcements of your book or business. Yes, you want to tell the world, but learn the fine art of subtlety. We have lost numerous members because of the amount of 'friend' mail they instantly receive. This Hurts Everyone.

Also, DO NOT post the same information multiple times throughout the site. It will be deleted without notice.

 

Spam is unsolicited advertising, whether it is posted as comments on other members' pages or is emailed for marketing purposes.

 

Please be considerate. Post your advertisement in the proper Articles/Forum or Group. There are inexpensive marketing channels that reach every member for just $25 on the Advertising tab. You can post your information on your profile and even update your blog as often as you like.

 

We are not into censorship, so please don't make us ask you to leave. Be kind and unselfish - don't spam.

 

Your Account Will Be Deleted Without Warning For Spam.

 

Blog Posts

E-Fields, Nuclear Spin, Qubits, Silicon...

Posted by Reginald L. Goodwin on August 22, 2017 at 5:19am 0 Comments

Photograph of a sapphire wafer that is patterned with the photonic bandgap resonators used in this work. It shows two full devices and parts of four others. Before using them in experiments they are cut out of the array and wired up. The devices themselves are about 1 cm long. The serpentine structures are microwave Bragg mirrors and the straight lines of varying width at the center of each device are the microwave cavities. Courtesy: A Sigillito…

Continue

Solar Eclipse 2017...

Posted by Reginald L. Goodwin on August 21, 2017 at 5:30am 0 Comments

Image Source: NASA.gov

Topics: Eclipse, NASA, Space, Space Exploration

The good news: The eclipse glasses I ordered from Amazon are on the approved NASA list (see Friday's post).

The bad news:…
Continue

Watch Black Suns: An Astrophysics Adventure This Weekend!

Posted by JC Holbrook on August 18, 2017 at 10:23pm 0 Comments

PRESS RELEASE

Total Solar Eclipse African American Style: Black Suns: An Astrophysics Adventure



Black Suns: An Astrophysics Adventure, a documentary about chasing eclipses and science dreams, chronicles the lives of two globe-trotting astrophysicists, Dr. Alphonse Sterling and Dr. Hakeem Oluseyi, as they follow/document the two solar eclipses that occurred in 2012. The film is hosted by award-winning cultural astronomer Dr. Jarita Holbrook. Black Suns premiered on Friday, June 9 at the 7th Annual Art of Brooklyn Film Festival, where it won the Jury…

Continue

Eclipse Caveats...

Posted by Reginald L. Goodwin on August 18, 2017 at 6:30am 0 Comments

Image Source: See link [2] below

Topics: Astronomy, Astrophysics, Eclipse, Moon, NASA

Usually I do something about current events, but I will admit to you some exhaustion since Monday's Appomattox post and Tuesday's…
Continue

The Digital Brothers Multimedia

The Digital Brothers
Our goal is to provide cost effective technological solutions for home, small and big business. After over 20 years of service working in this field, we decided to utilize our talents to develop and cultivate our own vision to benefit the community.
2D & 3D Animation
Graphic & Web Design
Photo & Video
Multimedia Development
Online & Print Marketing

Contact Us Today To Assist In Your Business Success
Website: www.TheDigitalBrothers.com
Email: info@thedigitalbrothers.com

SKYCITY TALKRADIO

THE UNDERGROUND BY ROXANNE BLAND

Life as alpha of a werewolf pack is anything but predictable. But even Parker Berenson is surprised by the latest twist: he’s fallen in love with a space alien. Problem is, he suspects Melera, his sexy new flame, might be the serial killer terrorizing Seattle. Or maybe she isn’t. After all, just because she’s an interstellar assassin doesn’t mean she’s guilty.

http://blackrosepress.com/

© 2017   Created by Jarvis Sheffield - Admin.   Powered by

Badges  |  Report an Issue  |  Terms of Service