Direct determination of the magnetic structure of the delta phase of oxygen

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...

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Bibliographic Details
Published in:Physical review letters 2004-07, Vol.93 (5), p.055502-055502, Article 055502
Main Authors: Goncharenko, I N, Makarova, O L, Ulivi, L
Format: Article
Language:English
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Summary: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
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.93.055502