Thin magnetic crystals are path to ferromagnetic graphene
January 23, 2015 — Chromium triiodide (CrI3) crystals were identified as a promising platform for studying how magnetism can enhance electronic behaviors in materials that are only a few atoms thick. Development of such ultra-thin magnetic materials may be crucial for continued advancement in miniaturization and performance enhancement of electronic devices.
Researchers map atomic movements that trigger voltage fade in high-energy-density batteries
January 22, 2015 — ORNL researchers performed powder neutron diffraction experiments on high-voltage, high-capacity lithium- and manganese-rich nickel−manganese−cobalt layered composite oxides (LMR-NMCs) to obtain insights into the degradation mechanisms causing voltage fade in this high-potential cathode material.
Scientists Connect Thermoelectric Materials and Topological Insulators
January 20, 2015 — Quantum mechanical calculations of electronic structure and transport for Bi2Te3 and its sister material Bi2Te2Se solved the long-standing puzzle of why many materials that are topological insulators are also excellent thermoelectrics.
Rig designed to study effect of vibration on spent nuclear fuel
January 16, 2015 — Researchers have developed an innovative system, called Cyclic Integrated Reversible-bending Fatigue Tester (CIRFT), to test and evaluate the mechanical behavior of spent nuclear fuel (SNF) under normal transportation conditions. The SNF fatigue data generated by CIRFT technology are essential in assisting back end fuel cycle reliability investigation.
Synergy of Ionization with Defects Creates Amorphous Track
January 13, 2015 — A colossal synergy, orders of magnitude larger than anything previously reported, has been discovered to occur between electronic energy loss by ions and pre-existing atomic defects created by elastic energy loss in single-crystal strontium titanate (SrTiO3). This synergy results in the formation of nanometer-sized amorphous tracks, but only in the region with pre-existing defects.