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October 18, 2012IEEE Transactions on Magnetics

Enhanced Electric and Magnetic Properties of the Epitaxial (Ba₀. ₅ Sr₀. ₅) TiO₃/ BiFeO₃ Multiferroic Heterostructure

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Authors

YCY. ChenJMJun MiaoXZXueji Zhang

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Overview

Experimental study demonstrates enhanced ferroelectric and ferromagnetic properties in epitaxial BST/BFO heterostructures, suggesting promise for high-density memory applications.

Key Points

  • Fabricate and evaluate the structural, ferroelectric, ferromagnetic, and dielectric characteristics of an epitaxial (Ba0.5Sr0.5)TiO3/BiFeO3 multiferroic heterostructure.
  • Synthesized (Ba0.5Sr0.5)TiO3/BiFeO3 (BST/BFO) thin-film heterostructures via pulsed laser deposition onto La0.7Sr0.3MnO3-buffered (100) SrTiO3 substrates.
  • Characterized epitaxial film growth and crystal alignment using X-ray diffraction, followed by electrical and magnetic property testing.
  • The BST/BFO heterostructure demonstrated improved ferroelectric and ferromagnetic performance, yielding a remnant polarization (2Pr) of ~34.8 μC/cm² and a saturation magnetization (Ms) of ~4.65 emu/cm³.
  • The heterostructure exhibited a higher dielectric constant and lower dielectric loss relative to single BFO films.
  • Leakage current measurements matched space-charge-limited current (SCLC) conduction under low electric fields and Poole-Frenkel (PF) emission under high electric fields.

Cite This Study

Chen et al. (2012) studied this question.

synapsesocial.com/papers/6a8a83375c4c6b099dec99d8https://doi.org/10.1109/tmag.2012.2200459
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