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Tag: Jared Allred
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...