Raman Studies of Vanadates at Low Temperatures and High Pressures

E. Siranidi, D. Lampakis, D. Palles, E. Liarokapis, C. Colin, T.T.M. Palstra

    Research output: Contribution to journalArticleAcademicpeer-review

    4 Citations (Scopus)

    Abstract

    The spin and orbital ordering have been examined for high-quality SmVO(3) polycrystalline compound using Raman spectroscopy. Measurements were obtained on individual microcrystallites in the approximate y(zz)y and y(xx)y scattering configurations at low temperatures (down to 20 K) and high pressures (up to 2.75 GPa). At room temperature and ambient pressure only the A(g) phonons have been observed in both polarizations examined. The decrease of temperature leads to the appearance of extra peaks in the Raman spectra related to the magnetic and structural transitions that occur in the system. We present evidence of a coexistence of the monoclinic and orthorhombic phases accompanied with the coexistence of the G- and C-type OO phases for temperatures below 100 K. However, no sign of any structural transition has been observed in the high pressure Raman spectra (1.87 <P <2.75 GPa) at low temperatures Ta parts per thousand yen80 K, indicating that SmVO(3) remains orthorhombic, at least down to 80 K.
    Original languageEnglish
    Pages (from-to)185-188
    Number of pages4
    JournalJournal of superconductivity and novel magnetism
    Volume22
    Issue number2
    DOIs
    Publication statusPublished - Feb 2009

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