Ultra-large non-volatile modulation of magnetic moments in PbZr0.2Ti0.8O3/MgO/La0.7Sr0.3MnO3 heterostructure at room temperature via interfacial polarization mediation

Q Liu; J Miao; Robert Reeve; K K Meng; X G Xu; Y Wu; Y Jiang

doi:10.1038/s41598-017-03019-x

Ultra-large non-volatile modulation of magnetic moments in PbZr_0.2Ti_0.8O₃/MgO/La_0.7Sr_0.3MnO₃ heterostructure at room temperature via interfacial polarization mediation

Sci Rep. 2017 Jun 1;7(1):2627. doi: 10.1038/s41598-017-03019-x.

Authors

Q Liu¹, J Miao², Robert Reeve³, K K Meng¹, X G Xu¹, Y Wu¹, Y Jiang⁴

Affiliations

¹ School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
² School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China. [email protected].
³ Institut für Physik, Johannes Gutenberg-Universität Mainz, 55099, Mainz, Germany.
⁴ School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China. [email protected].

Abstract

Multiferroic hybrid structures PbZr_0.2Ti_0.8O₃ (PZT)/La_0.7Sr_0.3MnO₃ (LSMO) and PZT/MgO/LSMO were epitaxially deposited on (001) Nb:SrTiO₃ crystals. Crystallinity and ferroelectric domain structures were investigated for the PZT/LSMO heterostructure. Interestingly, relatively high non-volatile magnetoelectric coupling effects were observed in both heterostructures at room temperature. The change of chemical valence for Mn and Ti at the PZT/MgO/LSMO interface may play a dominant role rather than external strain or orbital reconstruction, which lead to a large modulation of the magnetization. Correspondingly, the transport behavior of the PZT/MgO/LSMO heterostructure is investigated to confirm the role of oxygen vacancies motion. Our result indicates that the PZT/MgO/LSMO heterostructure have a promising application for future high-density non-volatile memories.

Publication types

Research Support, Non-U.S. Gov't