2001/06/13 by Viktor V. Struzhkin, Ho‐kwang Mao, Ho-kwang Mao +14
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #Crystallography and Radiation Phenomena #High-pressure geophysics and materials #X-ray Diffraction in Crystallography #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.87.255501
4 pages, 4 figures
arxiv created 2001/06/13 · openalex publication_date 2001/11/27 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The partial density of vibrational states has been measured for Fe in compressed FeO (wüstite) using nuclear resonant inelastic x-ray scattering. Substantial changes have been observed in the overall shape of the density of states close to the magnetic transition around 20 GPa from the paramagnetic (low pressure) to the antiferromagnetic (high pressure) state. The results indicate that strong magnetoelastic coupling in FeO is the driving force behind the changes in the phonon spectrum of FeO. The paper presents the first observation of changes in the density of terahertz acoustic phonon states under magnetic transition at high pressure.