Featured Research

from universities, journals, and other organizations

Magnetic memories manipulated by voltage, not heat

Date:
September 1, 2011
Source:
American Institute of Physics
Summary:
Using voltage to encode magnetic data could lead to smaller, faster memory devices -- but not if heat is doing all the work. Fortunately, it is the voltage itself, and not the side effect of heating, that modifies the magnets' properties.

In their search for smaller, faster information-storage devices, physicists have been exploring ways to encode magnetic data using electric fields. One advantage of this voltage-induced magnet control is that less power is needed to encode information than in a traditional system.

But earlier this year, researchers reported that a key element of magnetization called coercivity is not controlled by voltage at all, but rather by an unfortunate byproduct of applying electricity to a material -- that is, by heat. (Coercivity is the tendency of a magnetic material to resist becoming demagnetized.)

To further explore whether voltage or heating is responsible for changes to a magnet's coercivity, scientists from Tsinghua University in Beijing, China, tested three structures commonly used in magnetic memory experiments. Their verdict: It's not the heat.

In a paper accepted for publication in the AIP's Journal of Applied Physics, the authors show that the voltage is directly controlling changes in the magnetic properties of all three of the tested materials. For example, the researchers demonstrate that the effect can be turned on and off almost instantaneously, whereas the changes should lag if heat is the cause. This is a good thing for the field, since a system that produces too much heat would slow down the performance of any real-world device made from this technology.


Story Source:

The above story is based on materials provided by American Institute of Physics. Note: Materials may be edited for content and length.


Journal Reference:

  1. Jing Wang, Jing Ma, Zheng Li, Yang Shen, Yuanhua Lin, C. W. Nan. Switchable voltage control of the magnetic coercive field via magnetoelectric effect. Journal of Applied Physics, 2011; 110 (4): 043919 DOI: 10.1063/1.3626748

Cite This Page:

American Institute of Physics. "Magnetic memories manipulated by voltage, not heat." ScienceDaily. ScienceDaily, 1 September 2011. <www.sciencedaily.com/releases/2011/08/110829114735.htm>.
American Institute of Physics. (2011, September 1). Magnetic memories manipulated by voltage, not heat. ScienceDaily. Retrieved October 20, 2014 from www.sciencedaily.com/releases/2011/08/110829114735.htm
American Institute of Physics. "Magnetic memories manipulated by voltage, not heat." ScienceDaily. www.sciencedaily.com/releases/2011/08/110829114735.htm (accessed October 20, 2014).

Share This



More Matter & Energy News

Monday, October 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Gulfstream G500, G600 Unveiling

Gulfstream G500, G600 Unveiling

Flying (Oct. 20, 2014) Watch Gulfstream's public launch of the G500 and G600 at their headquarters in Savannah, Ga., along with a surprise unveiling of the G500, which taxied up under its own power. Video provided by Flying
Powered by NewsLook.com
Japanese Scientists Unveil Floating 3D Projection

Japanese Scientists Unveil Floating 3D Projection

Reuters - Innovations Video Online (Oct. 20, 2014) Scientists in Tokyo have demonstrated what they say is the world's first 3D projection that floats in mid air. A laser that fires a pulse up to a thousand times a second superheats molecules in the air, creating a spark which can be guided to certain points in the air to shape what the human eye perceives as an image. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Hey, Doc! Sewage, Beer and Food Scraps Can Power Chevrolet’s Bi-Fuel Impala

Hey, Doc! Sewage, Beer and Food Scraps Can Power Chevrolet’s Bi-Fuel Impala

3BL Media (Oct. 20, 2014) Hey, Doc! Sewage, Beer and Food Scraps Can Power Chevrolet’s Bi-fuel Impala Video provided by 3BL
Powered by NewsLook.com
What We Know About Microsoft's Rumored Smartwatch

What We Know About Microsoft's Rumored Smartwatch

Newsy (Oct. 20, 2014) Microsoft will reportedly release a smartwatch that works across different mobile platforms, has a two-day battery life and tracks heart rate. 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:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

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