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

作者：Liu, Q.; Miao, J.^*; Reeve, Robert; Meng, K. K.; Xu, X. G.; Wu, Y.; Jiang, Y.^*

来源：Scientific Reports, 2017, 7(1): 2627.

DOI：10.1038/s41598-017-03019-x

• DEFECT CHEMISTRY
• MAGNETORESISTANCE
• CONDUCTIVITY
• MECHANISMS
• FILMS

Multiferroic hybrid structures PbZr0.2Ti0.8O3 (PZT)/La0.7Sr0.3MnO3 (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.

• 出版日期2017-6-1
• 单位北京科技大学