New research at the University of Arkansas reveals a novel magnetoelectric effect that makes it possible to control magnetism with an electric field.
The novel mechanism may provide a new route for using multiferroic materials for the application of RAM (random access memories) in computers and other devices, such as printers.
An international research team, led by U of A physicists, reported its findings in an article titled, “Prediction of a Novel Magnetoelectric Switching Mechanism in Multiferroics,” on Feb. 5 in the journal Physical Review Letters.
The researchers studied a new predicted state of the multiferroic bismuth ferrite, a compound that can change its electrical polarization when under a magnetic field or magnetic properties when under an electric field. Because of these effects, bismuth ferrite interests researchers who want to design novel devices — based on magnetoelectric conversion.
The “coupling mechanism” in bismuth ferrite between magnetic order and electrical polarization order is required for this phenomenon to be clearly understood, said Yurong Yang, a research assistant professor of physics in the J. William Fulbright College of Arts and Sciences.
“We discovered an unknown magnetoelectric switching mechanism,” Yang said. “In this mechanism, the magnetic order and electrical polarization are not coupled directly, they are coupled with oxygen octahedral tilting, respectively. The switching polarization by electric field leads to the change of the sense of the rotation of oxygen octahedral, which in turn induces the switching of the magnetic order.
“These two couplings are governed by an interaction between three different physical quantities, called ‘tri-linear coupling,’ he said. “In contrast with the trilinear-coupling effects in the literature, the new coupling involves a large polarization and thus can be easily tuned by an electric field.”
Yang performed calculations with the assistance of the Arkansas High Performing Computing Center at the University of Arkansas. He was joined in the study by Laurent Bellaiche, a Distinguished Professor of physics at the U of A. Bellaiche and Yang conducted their research in the university’s Institute for Nanoscience and Engineering.
Also collaborating on the paper were Jorge Iniguez of the Materials Science Institute at the Autonomous University of Barcelona in Spain and Ai-Jie Mao of the Institute of Atomic and Molecular Physics at Sichuan University in China.Contacts:
Chris Branam | Newswise
Spiral arms: not just in galaxies
30.09.2016 | Max-Planck-Institut für Radioastronomie
Discovery of an Extragalactic Hot Molecular Core
29.09.2016 | National Astronomical Observatory of Japan
Heavy construction machinery is the focus of Oak Ridge National Laboratory’s latest advance in additive manufacturing research. With industry partners and university students, ORNL researchers are designing and producing the world’s first 3D printed excavator, a prototype that will leverage large-scale AM technologies and explore the feasibility of printing with metal alloys.
Increasing the size and speed of metal-based 3D printing techniques, using low-cost alloys like steel and aluminum, could create new industrial applications...
Friction stir welding is a still-young and thus often unfamiliar pressure welding process for joining flat components and semi-finished components made of light metals.
Scientists at the University of Stuttgart have now developed two new process variants that will considerably expand the areas of application for friction stir welding.
Technologie-Lizenz-Büro (TLB) GmbH supports the University of Stuttgart in patenting and marketing its innovations.
Friction stir welding is a still-young and thus often unfamiliar pressure welding process for joining flat components and semi-finished components made of...
Optical quantum computers can revolutionize computer technology. A team of researchers led by scientists from Münster University and KIT now succeeded in putting a quantum optical experimental set-up onto a chip. In doing so, they have met one of the requirements for making it possible to use photonic circuits for optical quantum computers.
Optical quantum computers are what people are pinning their hopes on for tomorrow’s computer technology – whether for tap-proof data encryption, ultrafast...
The Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP has been developing various applications for OLED microdisplays based on organic semiconductors. By integrating the capabilities of an image sensor directly into the microdisplay, eye movements can be recorded by the smart glasses and utilized for guidance and control functions, as one example. The new design will be debuted at Augmented World Expo Europe (AWE) in Berlin at Booth B25, October 18th – 19th.
“Augmented-reality” and “wearables” have become terms we encounter almost daily. Both can make daily life a little simpler and provide valuable assistance for...
With the help of artificial intelligence, chemists from the University of Basel in Switzerland have computed the characteristics of about two million crystals made up of four chemical elements. The researchers were able to identify 90 previously unknown thermodynamically stable crystals that can be regarded as new materials. They report on their findings in the scientific journal Physical Review Letters.
Elpasolite is a glassy, transparent, shiny and soft mineral with a cubic crystal structure. First discovered in El Paso County (Colorado, USA), it can also be...
30.09.2016 | Event News
29.09.2016 | Event News
28.09.2016 | Event News
30.09.2016 | Materials Sciences
30.09.2016 | Earth Sciences
30.09.2016 | Life Sciences