Featured Research

from universities, journals, and other organizations

Moldable, "Tunable" Magnets Make Their Debut

Date:
February 28, 2000
Source:
American Association For The Advancement Of Science
Summary:
What if researchers could create a tough, lightweight, moldable material, with "tunable" magnetic properties? Molded into different shapes, such a material might someday prove useful for high-density data storage, anti-static coatings for aircraft or spacecraft, and a host of other applications.

Washington, D.C. -- What if researchers could create a tough, lightweight, moldable material, with "tunable" magnetic properties? Molded into different shapes, such a material might someday prove useful for high-density data storage, anti-static coatings for aircraft or spacecraft, and a host of other applications.

In the February 25 issue of the journal, Science, a first step toward tunable, ceramic magnets is reported by a group of researchers from Canada's University of Toronto (UT). Lead Science author Mark J. MacLachlan and colleagues tweaked iron-and-polymer molecules, transforming them into a magnetic ceramic material, which was molded into various shapes.

Key to the process is a technique for opening the rings in polymers. The group begins with monomers of silaferrocenophane (SFP). Subjecting the SFP to gentle heat produces poly(ferrocenylsilane), or PFS. Poured into molds of various shapes and subjected to more low heat, the molecules in this precursor material transform into a cross-linked network, which is loaded with trapped iron.

High doses of heat in a pyrolysis chamber sets the encapsulated iron free to seek other iron and form nanoclusters. Because larger clusters are more strongly magnetic, or ferromagnetic, the researchers can tune the material's magnetism, by adjusting the temperature inside the pyrolysis chamber. Around 500 degrees Celsius (932 degrees Fahrenheit), "The structure transforms, and iron starts coming together," Manners explains. "You get bigger and bigger clusters as you go to higher and higher temperatures."

Practical applications are still "far down the road," Manners emphasizes, but the possibilities seem limitless.

"We have created a new class of magnetically tunable, shaped ceramics, which you could potentially form as powders, wires, films, or tapes, for example," says Science coauthor Geoffrey A. Ozin. The UT team focused on basic scientific problems, Ozin notes. "We have characterized these materials to the point where you can now sit down and decide, what would be the utility of these materials?"

Along with MacLachlan, Ozin and Manners, coauthors on the Science paper were UT colleagues Madlen Ginzburg, Neil Coombs, Thomas W. Coyle, and Nandyala P. Raju, as well as John E. Greedan of the Institute for Materials Research at McMaster University.


Story Source:

The above story is based on materials provided by American Association For The Advancement Of Science. Note: Materials may be edited for content and length.


Cite This Page:

American Association For The Advancement Of Science. "Moldable, "Tunable" Magnets Make Their Debut." ScienceDaily. ScienceDaily, 28 February 2000. <www.sciencedaily.com/releases/2000/02/000228080945.htm>.
American Association For The Advancement Of Science. (2000, February 28). Moldable, "Tunable" Magnets Make Their Debut. ScienceDaily. Retrieved July 30, 2014 from www.sciencedaily.com/releases/2000/02/000228080945.htm
American Association For The Advancement Of Science. "Moldable, "Tunable" Magnets Make Their Debut." ScienceDaily. www.sciencedaily.com/releases/2000/02/000228080945.htm (accessed July 30, 2014).

Share This




More Matter & Energy News

Wednesday, July 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Britain Testing Driverless Cars on Roadways

Britain Testing Driverless Cars on Roadways

AP (July 30, 2014) British officials said on Wednesday that driverless cars will be tested on roads in as many as three cities in a trial program set to begin in January. Officials said the tests will last up to three years. (July 30) Video provided by AP
Powered by NewsLook.com
China's Drone King Says the Revolution Depends on Regulators

China's Drone King Says the Revolution Depends on Regulators

Reuters - Business Video Online (July 30, 2014) Comparing his current crop of drones to early personal computers, DJI founder Frank Wang says the industry is poised for a growth surge - assuming regulators in more markets clear it for takeoff. Jon Gordon reports. Video provided by Reuters
Powered by NewsLook.com
3Doodler Bring 3-D Printing to Your Hand

3Doodler Bring 3-D Printing to Your Hand

AP (July 30, 2014) 3-D printing is a cool technology, but it's not exactly a hands-on way to make things. Enter the 3Doodler: the pen that turns you into the 3-D printer. AP technology writer Peter Svensson takes a closer look. (July 30) Video provided by AP
Powered by NewsLook.com
Climate Change Could Cost Billions, According To White House

Climate Change Could Cost Billions, According To White House

Newsy (July 29, 2014) A report from the White House warns not curbing greenhouse gas emissions could cost the U.S. billions. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins