Second-order phase transition in Ca2 - x Srx RuO4: A Raman study

H. Rho, S. L. Cooper, S. Nakatsuji, Y. Maeno

Research output: Contribution to journalArticlepeer-review

Abstract

We use Raman scattering to study the second-order structural transition in metallic Ca2 - x Srx RuO4 for x = 0.3. With increasing temperature, the following phonon behaviors are observed in the Raman spectra: the 320 cm- 1 mode exhibits an enhancement both in peak energy and in intensity near the characteristic temperature TO ∼ 220 K; the 374 cm- 1 mode exhibits a significant decrease in peak energy with increasing temperature toward TO; and the intensity of the 374 cm- 1 mode gradually decreases with increasing temperature, and finally disappears above 230 K. These phonon behaviors suggest that a second-order structural transition occurs in the metallic phase of Ca1.7 Sr0.3 RuO4 through TO ≃ 220 K.

Original languageEnglish (US)
Pages (from-to)e266-e268
JournalJournal of Magnetism and Magnetic Materials
Volume310
Issue number2 SUPPL. PART 2
DOIs
StatePublished - Mar 2007

Keywords

  • Ca Sr RuO
  • Phase transition
  • Raman scattering

ASJC Scopus subject areas

  • Condensed Matter Physics

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