Featured Research

from universities, journals, and other organizations

Arizona State University Professor Finds New Twist To Old Theory Of Magnetism

Date:
November 20, 2000
Source:
Arizona State University
Summary:
Physics and Astronomy professor Ralph V. Chamberlin has found a new twist to an old theory of magnetism. By using a novel application of thermodynamics, Chamberlin successfully extended the range of the mean-field theory of ferromagnetism to accurately describe the behavior of ferromagnetic materials across a broader range of temperatures.

Tempe, AZ -- Physics and Astronomy professor Ralph V. Chamberlin has found a new twist to an old theory of magnetism. By using a novel application of thermodynamics, Chamberlin successfully extended the range of the mean-field theory of ferromagnetism to accurately describe the behavior of ferromagnetic materials across a broader range of temperatures.

The mean-field theory of ferromagnetism, created in 1907 by Pierre Weiss, was an important milestone in the development of modern physics. It describes the properties of strongly magnetic materials, such as iron, but had an impact far beyond magnet research.

"Mean-field theory was the first viable model for ferromagnetism. Although its predictions near the transitional temperature have been found to be inaccurate, it remains popular as the most versatile approach for describing many different properties in a wide-range of materials," said Chamberlin.

For the past 30 years, an alternative theory has been used for the behavior near the transition. Chamberlin's groundbreaking research shows that the mean-field theory can be extended down to the transition so there is no need for a separate theory.

The mean-field approach can, in fact, describe the behavior of ferromagnets in this regime, as well as higher temperatures. "This becomes possible by including the effect of small, nanometer-sized clusters in the sample," he says.

The long history of the mean-field theory and the implications of Chamberlin's findings are discussed in an accompanying Nature News and Views article by Tom Giebultowicz of Oregon State University.

The research is published in the November 16, 2000 issue of Nature.


Story Source:

The above story is based on materials provided by Arizona State University. Note: Materials may be edited for content and length.


Cite This Page:

Arizona State University. "Arizona State University Professor Finds New Twist To Old Theory Of Magnetism." ScienceDaily. ScienceDaily, 20 November 2000. <www.sciencedaily.com/releases/2000/11/001120074015.htm>.
Arizona State University. (2000, November 20). Arizona State University Professor Finds New Twist To Old Theory Of Magnetism. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2000/11/001120074015.htm
Arizona State University. "Arizona State University Professor Finds New Twist To Old Theory Of Magnetism." ScienceDaily. www.sciencedaily.com/releases/2000/11/001120074015.htm (accessed July 31, 2014).

Share This




More Matter & Energy News

Thursday, July 31, 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
7 Ways to Use Toothpaste: Howdini Hacks

7 Ways to Use Toothpaste: Howdini Hacks

Howdini (July 30, 2014) Fresh breath and clean teeth are great, but have you ever thought, "my toothpaste could be doing more". Well, it can! Lots of things! Howdini has 7 new uses for this household staple. Video provided by Howdini
Powered by NewsLook.com
Amid Drought, UCLA Sees Only Water

Amid Drought, UCLA Sees Only Water

AP (July 30, 2014) A ruptured 93-year-old water main left the UCLA campus awash in 8 million gallons of water in the middle of California's worst drought in decades. (July 30) Video provided by AP
Powered by NewsLook.com
Smartphone Powered Paper Plane Debuts at Airshow

Smartphone Powered Paper Plane Debuts at Airshow

AP (July 30, 2014) Smartphone powered paper airplane that was popular on crowdfunding website KickStarter makes its debut at Wisconsin airshow (July 30) Video provided by AP
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