Abstract
Synchrotron-radiation diffraction experiments have revealed the critical role of nonhydrostatic stresses in the pressure-induced long-range order dissipation in ${\mathrm{Cs}}_{2}{\mathrm{HgBr}}_{4}$ crystals. With nonhydrostatic loading, the samples lose, reversibly, long-range order on the scale observable with x-ray diffraction above 11 GPa while hydrostatic conditions preserve long-range order up to 40 GPa, the limit achieved experimentally. The phenomenon is interpreted in terms of inhomogeneous lattice deformations induced in the sample by deviatoric stresses. Diffraction patterns of synthetic grains with chaotic distribution of deformations were computed, which displayed a sufficiently good agreement between calculated and observed diffraction patterns as to support the model.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
