Vacancy-induced magnetism in BaTiO3(001) thin films based on density functional theory

Dan Cao, Meng Qiu Cai, Wang Yu Hu, Ping Yu, Haitao Huang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

25 Citations (Scopus)

Abstract

The origin of magnetism induced by vacancies on BaTiO3(001) surfaces is investigated systematically by first-principles calculations within density-functional theory. The calculated results show that O vacancy is responsible for the magnetism of the BaO-terminated surface and the magnetism of the TiO2-terminated surface is induced by Ti vacancy. For the BaO-terminated surface, the magnetism mainly arises from the unpaired electrons that are localized in the O vacancy basin. In contrast, for the TiO2-terminated surface, the magnetism mainly originates from the partially occupied O-2p states of the first nearest neighbor O atoms surrounding the Ti vacancy. These results suggest the possibility of implementing magneto-electric coupling in conventional ferroelectric materials.
Original languageEnglish
Pages (from-to)4738-4745
Number of pages8
JournalPhysical Chemistry Chemical Physics
Volume13
Issue number10
DOIs
Publication statusPublished - 14 Mar 2011

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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