A team of scientists at Virginia Commonwealth University has synthesized a powerful new magnetic material that could reduce the dependence of the United States and other nations on rare earth elements produced by China.
"The discovery opens the pathway to systematically improving the new material to outperform the current permanent magnets," said Shiv Khanna, Ph.D., a commonwealth professor in the Department of Physics in the College of Humanities and Sciences.
The new material consists of nanoparticles containing iron, cobalt and carbon atoms with a magnetic domain size of roughly 5 nanometers. It can store information up to 790 kelvins with thermal and time-stable, long-range magnetic order, which could have a potential impact for data storage application.
When collected in powders, the material exhibits magnetic properties that rival those of permanent magnets that generally contain rare earth elements. The need to generate powerful magnets without rare earth elements is a strategic national problem as nearly 70 to 80 percent of the current rare earth materials are produced in China.
The team's findings will appear in the article "Experimental evidence for the formation of CoFe2C phase with colossal magnetocrystalline-anisotropy," in a forthcoming issue of Applied Physics Letters.
Permanent magnets, specifically those containing rare earth metals, are an important component used by the electronics, communications and automobile industries, as well as in radars and other applications.
Additionally, the emergence of green technology markets - such as hybrid and electric vehicles, direct drive wind turbine power systems and energy storage systems - have created an increased demand for permanent magnets.
However, China is the main supplier of world rare earth demands and has tried to impose restrictions on their export, creating an international problem.
The current paper is a joint experimental theoretical effort in which the new material was synthesized, characterized and showed improved characteristics following the theoretical prediction.
"This is good science along with addressing a problem with national importance," said Ahmed El-Gendy, a former postdoctoral associate in the Department of Chemistry in the College of Humanities and Sciences and a co-author of the paper.
Everett Carpenter, Ph.D., a professor in the Department of Chemistry and director of the VCU's Nanoscience and Nanotechnology Program, said the new material is "already showing promise, even for applications beyond permanent magnets."
The research was supported by ARPA-e REACT project 1574-1674 and the U. S. Department of Energy (DOE) through grant DE-SC0006420.
Brian McNeill | EurekAlert!
Serendipity uncovers borophene's potential
23.02.2017 | Northwestern University
20.02.2017 | Arizona State University
In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport
Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...
The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.
The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...
Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...
Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".
Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...
13.02.2017 | Event News
10.02.2017 | Event News
09.02.2017 | Event News
24.02.2017 | Life Sciences
24.02.2017 | Life Sciences
24.02.2017 | Trade Fair News