Rare earth-doped BiFeO3 thin films: Relationship between structural and magnetic properties

Ngo Thu Huong, Seunghun Lee, Timur Sh Atabaev, Makio Kurisu, Nguyen Hoa Hong

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Rare Earth- (RE-) doped BiFeO3 (BFO) thin films were grown on LaAlO3 substrates by using pulsed laser deposition technique. All of BFO films doped with 10% of RE show a single phase of rhombohedral structure. The saturated magnetization in the Ho- and Sm-doped films is much larger than those reported in literature and was observed at a quite low field as of 0.2 T. As for Pr- and Nd-doped BFO films, Fe2+ amount is not dominant; thus, ferromagnetism is not favored. As the RE concentration goes up to 20%, all compounds have drastically gone through a structural transition. The RE-doped BFO films have changed from rhombohedral to either pure orthorhombic phase (for Ho, Sm), or a mixed phase of orthorhombic and tetragonal (for Pr, Nd), or pure tetragonal (for Eu). We observed magnetic properties of RE-doped BFO films have significantly changed. While 20% Ho/Sm-doped BFO films have ferromagnetism degraded in comparison with the 10% doping case, the 20% Pr/Nd-doped BFO thin films, whose structure is a mixed phase, have magnetic ordering improved due to the fact that the Fe2+ amount has become greater. It seems that one can control the magnetic properties of BFO films by using appropriate RE dopants and concentrations.

Original languageEnglish
Article number371802
JournalAdvances in Condensed Matter Physics
Volume2015
DOIs
Publication statusPublished - 2015
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics

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