| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1595426 | Solid State Communications | 2009 | 4 Pages |
Abstract
A polycrystalline sample of FeSe, which adopts the tetragonal PbO-type structure (P4/nmm) at room temperature, has been prepared using solid state reaction. We have investigated pressure-induced structural changes in tetragonal FeSe at varying hydrostatic pressures up to 0.6 GPa in the orthorhombic (T=50 K) and tetragonal (T =190 K) phases using high resolution neutron powder diffraction. We report that the structure is quite compressible with a Bulk modulus ≈31 GPa to 33 GPa and that the pressure response is anisotropic with a larger compressibility along the cc-axis. Key bond angles of the SeFe4 pyramids and FeSe4 tetrahedra are also determined as a function of pressure.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Jasmine N. Millican, Daniel Phelan, Evan L. Thomas, Juscelino B. Leão, Elisabeth Carpenter,