June 10, 2013
Alan Goldman, Division of Materials Science and Engineering, (515) 294-3585
Paul Canfield, Division of Materials Science and Engineering, (515) 294-6270
Laura Millsaps, Public Affairs, (515) 294-3474
“Scientists at the U.S. Department of Energy’s (DOE) Ames Laboratory have discovered a new family of rare-earth quasicrystals using an algorithm they developed to help pinpoint them. Quasicrystalline materials may be found close to crystalline phases that contain similar atomic motifs, called crystalline approximants. And just like fishing experts know that casting a line in the right habitat hooks the big catch, the scientists used their knowledge to hone in on just the right spot for new quasicrystal materials discovery.
High-energy x-ray diffraction patterns from a single grain of i-Gd-Cd were taken at the Advanced Photon Source at Argonne National Laboratory with the beam parallel to the five-fold axis.
The pentagonal dodecahedral morphology of the icosahedral phase is shown with a millimeter scale; grains as large as 1.0 mm have been
Their research resulted in finding the only known magnetic rare earth icosahedral binary quasicrystals, now providing a ‘matched set’ of magnetic quasicrystals and their closely related periodic cousins.
The discovery has been published online by the journal Nature Materials in an article, A family of binary magnetic icosahedral quasicrystals based on rare earth and cadmium.
See the full article here.
This post is dedicated to S.F. in Morocco
For more than 60 years, the Ames Laboratory has sought solutions to energy-related problems through the exploration of chemical, engineering, materials, mathematical and physical sciences. Established in the 1940s with the successful development of the most efficient process to produce high-quality uranium metal for atomic energy, the Lab now pursues a broad range of scientific priorities.
Ames Laboratory shares a close working relationship with Iowa State University’s Institute for Physical Research and Technology, or IPRT, a network of scientific research centers at Iowa State University, Ames, Iowa.