Document Detail

Direct determination of the magnetic structure of the delta phase of oxygen.
MedLine Citation:
PMID:  15323705     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Simple diatomic molecules exhibit a variety of exciting physical phenomena under high pressures, including structural transitions, pressure induced metallization, and superconductivity. Oxygen is of particular interest because it carries a magnetic moment. For the first time we studied the magnetic structure in solid oxygen under very high pressure by a direct method, namely, neutron diffraction. A new type of magnetic order with ferromagnetic stacking of the antiferromagnetic O2 planes was discovered in delta-O2 at P=6.2 GPa. We show that all structural transformations at pressures <7 GPa are driven by spin interactions; therefore, high-pressure oxygen should be considered as a unique "spin-controlled crystal."
I N Goncharenko; O L Makarova; L Ulivi
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Publication Detail:
Type:  Journal Article     Date:  2004-07-29
Journal Detail:
Title:  Physical review letters     Volume:  93     ISSN:  0031-9007     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2004 Jul 
Date Detail:
Created Date:  2004-08-24     Completed Date:  2004-10-21     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  055502     Citation Subset:  -    
Laboratoire Léon Brillouin C.E.A.-C.N.R.S., CEA Saclay, 91191 Gif-sur-Yvette, France.
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