Thickness-dependent magnetism and spin-glass behaviors in compressively strained BiFeO3 thin films

Ching Jung Cheng*, Chengliang Lu, Zuhuang Chen, Lu You, Lang Chen, Junling Wang, Tao Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

71 Scopus citations

Abstract

Compressively strained BiFeO3 (BFO) films from 19 to 114 nm are epitaxially grown on LaAlO3 substrates, and their thickness-dependent evolutions of structural and magnetic properties are investigated. Across the morphotropic phase boundary, complex strain relaxation behaviors involving low-symmetry intermediate/bridging phases are observed. The fully strained 38 nm BFO film exhibits a saturation magnetization of ∼28 emu/cm3 at 300 K with a coercivity of 130 Oe while all films show a spin-glass behavior. These findings suggest that tailoring film thickness is effective to suppress the cycloidal magnetic modulation in BFO, leading to magnetic properties different from the bulk counterpart.

Original languageEnglish (US)
Article number242502
JournalApplied Physics Letters
Volume98
Issue number24
DOIs
StatePublished - Jun 13 2011

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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