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Magnetoelectric Nanocomposite Thin Films Designed by Composition Spreads

Published

Author(s)

Makoto Murakami, C Gao, K S. Chang, B Hu, M A. Aronova, C L. Lin, Jason Hattrick-Simpers, S E. Lofland, L Knauss, Leonid A. Bendersky, M. Wuttig, Ichiro Takeuchi

Abstract

Multiferroic materials Superscript (1,2) can exhibit magnetoelectric (ME) effects Superscript (3-5), which are of great interest for novel device applications including inexpensive ultrasensitive magnetometer approaching the sensitivity of SQUID Superscript (6,7) and bi-ferroic memory elements where spontaneous magnetization and charge polarization are coupled Superscript (8). While natural multiferroic compounds such as HoMnO Subscript (3) Superscript (2) and TbMn Subscript (2)O Subscript (5) Superscript (3) are rare and typically exhibit ME coupling at low temperatures under very high magnetic field, bulk composite and laminate ferroelectric-ferromagnetic systems such as PZT/Terfenol have been found to show large ME coupling coefficients Superscript (9,10). In such multiphase systems, the ME effect is a product property arising from the elastic interaction of ferromagnetic and ferroelectric materials whose individual component domains are typically of the order of microns to millimeters in size Superscript (11-13). Thin-film materials offer the possibility to create multiferroic composites where the component materials are modulated and coupled at the nanometer level. Here, we report on the synthesis of multiferroic nanocomposite structures and continuous tuning of their properties using a thin-film composition-spread technique Super (14,15). The ME effect was observed in thin-film structures for the first time. The highest ME coefficient obtained here (4 V/cm Oe) is among the largest values reported to date.
Citation
Nature

Keywords

combinatorial, multiferroics, PbTiOs-CoFe204 system

Citation

Murakami, M. , Gao, C. , Chang, K. , Hu, B. , Aronova, M. , Lin, C. , Hattrick-Simpers, J. , Lofland, S. , Knauss, L. , Bendersky, L. , Wuttig, M. and Takeuchi, I. (2021), Magnetoelectric Nanocomposite Thin Films Designed by Composition Spreads, Nature (Accessed May 23, 2024)

Issues

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Created October 12, 2021