The giant magneto-volume effect in solid oxygen

K. Katsumata, S. Kimura, U. Staub, Y. Narumi, Y. Tanaka, S. Shimomura, T. Nakamura, S. W. Lovesey, T. Ishikawa, H. Kitamura

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


X-ray diffraction measurements on α-solid oxygen under an applied magnetic field are reported. The volume of α-solid O2 is found to expand with increasing magnetic field: the lattice constants a and b elongate, while the lattice constant c and the angle β are almost independent of the magnetic field. The maximum volume expansion observed is about 1% under a 7.5 T field, which is a giant effect compared to the volume change observed in ferromagnetic metals, such as Fe, Co and Ni. This finding indicates that a spin-dependent inter-molecular potential is essential in determining the structure of α-solid O2. The experimental results conform with predictions based on a magneto-elastic interaction derived from an antiferromagnetic exchange coupling of O2 spins.

Original languageEnglish
Pages (from-to)L235-L239
JournalJournal of Physics Condensed Matter
Issue number23
Publication statusPublished - 2005 Jun 15


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