The emergence of magnetic ordering at complex oxide interfaces tuned by defects

D. S. Park*, A. D. Rata, I. V. Maznichenko, S. Ostanin, Yulin Gan, S. Agrestini, G. J. Rees, M. Walker, J. Li, J. Herrero-Martin, G. Singh, Z. Luo, A. Bhatnagar, Yunzhong Chen, V. Tileli, P. Muralt, A. Kalaboukhov, I. Mertig, K. Dörr, A. ErnstNini Pryds

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

116 Downloads (Pure)


Complex oxides show extreme sensitivity to structural distortions and defects, and the intricate balance of competing interactions which emerge at atomically defined interfaces may give rise to unexpected physics. In the interfaces of non-magnetic complex oxides, one of the most intriguing properties is the emergence of magnetism which is sensitive to chemical defects. Particularly, it is unclear which defects are responsible for the emergent magnetic interfaces. Here, we show direct and clear experimental evidence, supported by theoretical explanation, that the B-site cation stoichiometry is crucial for the creation and control of magnetism at the interface between non-magnetic ABO3-perovskite oxides, LaAlO3 and SrTiO3. We find that consecutive defect formation, driven by atomic charge compensation, establishes the formation of robust perpendicular magnetic moments at the interface. Our observations propose a route to tune these emerging magnetoelectric structures, which are strongly coupled at the polar-nonpolar complex oxide interfaces.

Original languageEnglish
Article number3650
JournalNature Communications
Issue number1
Publication statusPublished - 2020


Dive into the research topics of 'The emergence of magnetic ordering at complex oxide interfaces tuned by defects'. Together they form a unique fingerprint.

Cite this