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Tag: superconductivity
Omar Chmaissem and Dennis Brown
Scientists from NIU and Argonne National Laboratory are reporting this week in the journal Nature Physics on the discovery of exotic magnetic structures in iron-based superconductors. Superconductors exhibit amazing properties: When cooled below certain temperatures, they conduct electricity without energy-sapping resistance. But the best known superconducting materials can operate only below 218 degrees Fahrenheit under...
NIU biologist Rangaswamy “Nathan” Meganathan works with Debarati Ghose, a graduate student in biology.
First, the good news: Five NIU professors this summer snagged three prestigious grants that total nearly $1 million. Now for the better news: the funding also provides cutting-edge research opportunities for NIU students, allowing them to work alongside top scientists in their disciplines. “These are impressive research projects by an extraordinary group of faculty scientists...
A neutron diffraction image giving evidence for the new magnetic phase in iron-based superconductors discovered by Argonne scientists. It shows the scattering results from a sample of barium iron arsenide with sodium ions added to 24 percent of the barium sites. Nematic order sets in below 90 K but four-fold symmetry is restored below 40 K. The resulting atomic and magnetic structures are illustrated in the figure on the right, in which the blue spheres represent iron atoms and the red arrows show the direction of their magnetic moments. Image by Jared Allred.
Northern Illinois University physics professor Omar Chmaissem, an NIU alumnae and a current postdoctoral student are key members of a team of scientists at the U.S. Department of Energy’s Argonne National Laboratory shedding light this week on the mysteries of superconductivity. In a study published today in “Nature Communications,” the team announces the discovery of...