Misfit strain-induced changes in the Fe-sublattice of multiferroic Pb(Fe1/2Nb1/2)O3epitaxial nanofilm seen via Raman spectroscopy

Yu I. Yuzyuk, I. P. Raevski*, S. I. Raevskaya, N. Lemée, M. G. Karkut, W. Peng, M. El Marssi, Haydn Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Magnetic phase transition temperature of the PbFe1/2Nb1/2O3(PFN) nanofilm on the SrTiO3substrate was reported to be about 50 K higher than that in the bulk samples. We carried out comparative Raman studies of a 90 nm-thick PFN epitaxial film on SrRuO3-buffered (001) SrTiO3substrate and the bulk samples of ceramic PFN and a single crystal. It was found out that the bands at ≈250 cm−1and ≈700 cm−1in the spectrum of the film, corresponding to Fe[sbnd]O vibrational modes, are shifted by about 20 cm−1to higher frequencies as compared to the bulk samples. This result is in line with the predictions of the recent first-principles calculations that compressive misfit strain stimulates the disorder in the Fe and Nb distribution in the lattice, leading to an increase of the magnetic phase transition temperature. Such disordering might cause the changes in the Fe-sublattice of PFN seen in the Raman spectrum.

Original languageEnglish
Pages (from-to)1821-1825
Number of pages5
JournalJournal of Alloys and Compounds
Volume695
DOIs
StatePublished - 1 Jan 2017

Keywords

  • Lead iron niobate
  • Multiferroic
  • Raman spectra
  • Strain engineering
  • Thin film

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