Document Detail

High-pressure phase transitions in rare earth metal thulium to 195 GPa.
MedLine Citation:
PMID:  21460429     Owner:  NLM     Status:  In-Data-Review    
We have performed image plate x-ray diffraction studies on a heavy rare earth metal, thulium (Tm), in a diamond anvil cell to a pressure of 195 GPa and volume compression V/V(o) = 0.38 at room temperature. The rare earth crystal structure sequence, [Formula: see text] distorted fcc, is observed in Tm below 70 GPa with the exception of a pure fcc phase. The focus of our study is on the ultrahigh-pressure phase transition and Rietveld refinement of crystal structures in the pressure range between 70 and 195 GPa. The hexagonal hR- 24 phase is seen to describe the distorted fcc phase between 70 and 124 GPa. Above 124 ± 4 GPa, a structural transformation from hR 24 phase to a monoclinic C 2/m phase is observed with a volume change of - 1.5%. The equation of state data shows rapid stiffening above the phase transition at 124 GPa and is indicative of participation of f-electrons in bonding. We compare the behavior of Tm to other heavy rare-earths and heavy actinide metals under extreme conditions of pressure.
Jeffrey M Montgomery; Gopi K Samudrala; Georgiy M Tsoi; Yogesh K Vohra
Related Documents :
9005849 - Magnetic collapse in transition metal oxides at high pressure: implications for the earth
21403289 - Microscopic dynamics of structural transition in iron with a nanovoid under shock loading.
21429209 - Relationship between postprandial changes in cardiac left ventricular function, glucose...
21173729 - Abi derived from the highest and lowest ankle pressure. what is the difference?
21384379 - A comparison between high hydrostatic pressure extraction and heat extraction of ginsen...
21520489 - High-pressure treatment reduces the immunoreactivity of the major allergens in apple an...
2192529 - The response of the light reflex of retinal vessels to reduced blood pressure in hypert...
11052279 - Effect of atp-potassium channel opener nicorandil on long-term cardiac preservation.
2427879 - Operant conditioning, sodium loading, and experimental hypertension.
Publication Detail:
Type:  Journal Article     Date:  2011-04-01
Journal Detail:
Title:  Journal of physics. Condensed matter : an Institute of Physics journal     Volume:  23     ISSN:  1361-648X     ISO Abbreviation:  J Phys Condens Matter     Publication Date:  2011 Apr 
Date Detail:
Created Date:  2011-04-04     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101165248     Medline TA:  J Phys Condens Matter     Country:  England    
Other Details:
Languages:  eng     Pagination:  155701     Citation Subset:  IM    
Department of Physics, University of Alabama at Birmingham (UAB), Birmingham, AL 35294, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Eliashberg theory of excitonic insulating transition in graphene.
Next Document:  Tight-binding electrons on triangular and kagomé lattices under staggered modulated magnetic fields...