Self-assembled nanoscale capacitor cells based on ultrathin BiFeO3films

Qing Miao, Min Zeng, Zhang Zhang, Xubing Lu, Jiyan Dai, Xingsen Gao, Jun Ming Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

12 Citations (Scopus)

Abstract

Ultrathin multiferroic BiFeO3(BFO) films with self-assembled surface nano-islands on La0.67Sr0.33MnO3/(100) SrTiO3substrates are fabricated by a one-step pulsed laser deposition process using the Bi-rich BFO target. It is revealed that these surface nano-islands mainly consist of conductive Bi2O3outgrowths, which serve as top electrodes for the nanoscale BFO capacitor cells with lateral size of 10-30nm. The ferroelectric BFO layer underneath these Bi2O3nanoislands prefers certain complex domain structure with vertical and antiparallel polarization components (the so-called "anti-domain structure") and reduced domain switching fields. Moreover, these nanoscale capacitor cells exhibit the resistive switching IV behavior, offering opportunities for application in ultrahigh density non-volatile memories.
Original languageEnglish
Article number182903
JournalApplied Physics Letters
Volume104
Issue number18
DOIs
Publication statusPublished - 5 May 2014

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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