Physicists Predict Behavior of Rare Materials at Near-Room Temperature

Yurong Yang, research assistant professor, University of Arkansas
Photo by Russell Cothren

Yurong Yang, research assistant professor, University of Arkansas

FAYETTEVILLE, Ark. — New theoretical physics research reveals rare materials that possess both controllable magnetic and electric polarization properties at near-room temperatures.

The discovery could lead to longer battery life and increased memory storage for electronic devices, said Yurong Yang, a research assistant professor at the University of Arkansas.

An international team of physicists published its findings on May 28 in Nature Communications, an online journal published by the journal Nature, in a paper titled “Near room-temperature multiferroic materials with tunable ferromagnetic and electrical properties.”

A rare class of materials known as multiferroics can change their electrical polarization when under a magnetic field or magnetic properties when under an electric field. But multiferroics usually exhibit these properties at temperatures far below room temperature, which makes them useless for every-day applications.

As a result, the materials used to power today’s memory devices do so through electricity or magnetism, but not both.

The research team included Yang and Laurent Bellaiche, Distinguished Professor of physics at the University of Arkansas. Yang, a theoretical physicist, used computer modeling to perform extremely accurate calculations on a specific class of materials to find combinations that would display these properties.

The researchers found that a specific class of multiferroics, when periodically alternating along a specific direction to make what is called a superlattice, should exhibit both controllable magnetic and electrical polarization properties at near-room temperature, Yang said.

Superlattices are like multi-layered cakes, where the cake layers are only nanometers thick and are made of different materials such as the multiferroics studied in this paper. The next step will be experimental confirmation of their calculations.

Yang and Bellaiche both conduct research in the University of Arkansas’ Institute for Nanoscience and Engineering and the department of physics. Bellaiche holds the Twenty-First Century Endowed Professorship in Nanotechnology and Science Education.

The results were obtained through a collaborative effort with Hong Jian Zhao, a former visiting graduate student at the University of Arkansas who is now completing his doctorate in the department of materials science and engineering at Zhejiang University in Hangzhou, China. Also collaborating on the study were Xiang Ming Chen, Zhao’s adviser at Zhejiang University; Wei Ren at Shanghai University in China and Jorge Iniguez at the Materials Science Institute of Barcelona in Spain.

Contacts

Laurent Bellaiche, Distinguished Professor of physics
J. William Fulbright College of Arts and Sciences
479-575-6425, laurent@uark.edu

Chris Branam, research communications writer/editor
University Relations
479-575-4737, cwbranam@uark.edu


Editor-selected comments will be published below. No abusive material, personal attacks, profanity, spam or material of a similar nature will be considered for publication.

comments powered by Disqus

Headlines

Lyrique Quintette to Open Fulbright Fine Arts Faculty Showcase Series, Feb. 24

Fulbright College will inaugurate a new series featuring fine arts faculty with a free performance by the Lyrique Quintette on Friday, Feb. 24.

AIM Conference Kicks Off Thursday

The U of A Black Graduate Student Association, in conjunction with the Graduate School and International Education, will host the Attracting Intelligent Minds Conference Feb. 23-26.

Lecture and Documentary on Representation of Muslim-American Women in Fashion, Feb 23.

Yasmin Moll's lecture entitled "Changing Representations of Muslim Women" will be at 6 p.m. Thursday, Feb. 23, and includes a screening of her documentary Fashioning Faith

Razorbacks Bring Their Talents to the UARK Talent Show

University Programs hosts the UARK Talent Show at 7 p.m. Saturday, Feb. 25, in the Arkansas Union Theatre on the fourth floor of the Arkansas Union.

Arkansas-Based Air Force Programs Complete Successful Review

The purpose of the Jan. 23 meeting was to examine the progress of several Arkansas-based research projects sponsored by the Air Force Office of Scientific Research.

Newswire Daily