High Pressure Low Temperature Studies of the Iron-Based Superconductor SrFe$_{2}$As$_{2}$

Iron-based superconductors are a critical clue in understanding the mechanism behind high temperature superconductivity. It is well-known that superconductivity is highly influenced by magnetic fields. Recent neutron scattering experiments were performed on SrFe$_{2}$As$_{2}$ to examine the nuclear and magnetic structure to a temperature of 89 K and a pressure of 4.3 GPa. The structural phase transition from tetragonal to orthorhombic was observed at T$_{\mathrm{o}} =$ 196 K with an increase in orthorhombic distortion with decreasing temperature. The neutron diffraction experiments revealed subtle, but interesting results at elevated pressures.