Large Longitudinal Magnetoelectric Coupling in NiFe₂O₄--BaTiO₃ Laminates

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概要

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• In contrast to the Pb-based magnetoelectric laminates (MELs), we find in the BaTiO₃ and NiFe₂O₄ laminates (number of layers $n=5{\mbox{--}}25$) that the longitudinal magnetoelectric (ME) voltage coefficient $\alpha_{\text{E33}}$ becomes much larger than the transverse one due to preferential alignment of magnetic moments along the NiFe₂O₄ plane. Moreover, upon decreasing each layer thickness down to 15 μm, we realize enhanced $\alpha_{\text{E33}}$ up to 18 mV/(cm$\cdot$Oe) and systematic increase of the ME sensitivity in proportion to $n$ to achieve the largest in the Pb-free MELs ($400\times 10^{-6}$ V/Oe), thereby providing pathways for tailoring ME coupling in mass-produced, environment friendly laminates.

• 2011-07-25

著者

• NAM Joong-Hee

  Center for Electronic Component Research, Korea Institute of Ceramic Engineering and Technology

• KIM Kee

  CeNSCMR, Department of Physics and Astronomy, Seoul National University

• CHAI Yi

  CeNSCMR, Department of Physics and Astronomy, Seoul National University

• KIM June-Hee

  Center for Electronic Component Research, Korea Institute of Ceramic Engineering and Technology

• KIM Byung-Ik

  Center for Electronic Component Research, Korea Institute of Ceramic Engineering and Technology

• PATIL Deepak

  CeNSCMR, Department of Physics and Astronomy, Seoul National University

• CHO Jeong-Ho

  Center for Electronic Component Research, Korea Institute of Ceramic Engineering and Technology

関連論文

• Large Longitudinal Magnetoelectric Coupling in NiFe2O4--BaTiO3 Laminates
• Competing Magnetic Anisotropy Fields and Double Polarization Flops in Multiferroic Mn

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