Evidence for a Soft Phonon Mode and a New Structure in Rare-Earth Metals under Pressure
- 22 November 1982
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 49 (21) , 1572-1575
- https://doi.org/10.1103/physrevlett.49.1572
Abstract
High-pressure x-ray diffraction experiments up to 30-40 GPa on lanthanum, praseodymium, and yttrium metals demonstrate that there is one more crystal structure in the regular rare-earth crystal-structure sequence. This structure results from a second-order phase transition in fcc phase and could be described by a zone-boundary soft phonon mode with .
Keywords
This publication has 15 references indexed in Scilit:
- Structural Phase Transitions in Yttrium under PressurePhysical Review Letters, 1981
- Evidence for 4f-shell delocalization in praseodymium under pressureJournal of Applied Physics, 1981
- Phonon anomaly near a Fermi surface topological transitionJournal of Physics F: Metal Physics, 1978
- RESISTANCE ANOMALIES IN PRASEODYMIUM UNDER PRESSURELe Journal de Physique Colloques, 1978
- Correlation between-Band Occupancy and Crystal Structure in the Rare EarthsPhysical Review Letters, 1977
- Pressure-induced lattice instability in fcc lanthanum at low temperatureJournal of Low Temperature Physics, 1975
- Calibration of the pressure dependence of the R1 ruby fluorescence line to 195 kbarJournal of Applied Physics, 1975
- Compression of lanthanum to 120 kbarSolid State Communications, 1975
- Effects of Pressure on the Electronic Structure of Transition d‐MetalsPhysica Status Solidi (b), 1974
- Allotropy in Some Rare-Earth Metals at High PressuresScience, 1964