Ubiquitous long-range antiferromagnetic coupling across the interface between superconducting and ferromagnetic oxides
- University of Naples Federico II, Via Cinthia, Naples (Italy)
- Piazza Leonardo da Vinci, Milano (Italy)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- European Synchrotron Radiation Facility (ESRF), Grenoble (France)
- Univ. of Twente, Enschede (Netherlands)
The so-called proximity effect is the manifestation, across an interface, of the systematic competition between magnetic order and superconductivity. This phenomenon has been well documented and understood for conventional superconductors coupled with metallic ferromagnets; however it is still less known for oxide materials, where much higher critical temperatures are offered by copper oxide-based superconductors. In this paper, we show that, even in the absence of direct Cu–O–Mn covalent bonding, the interfacial CuO2 planes of superconducting La1.85Sr0.15CuO4 thin films develop weak ferromagnetism associated to the charge transfer of spin-polarised electrons from the La0.66Sr0.33MnO3 ferromagnet. Theoretical modelling confirms that this effect is general to all cuprate/manganite heterostructures and the presence of direct bonding only affects the strength of the coupling. Finally, the Dzyaloshinskii–Moriya interaction, also at the origin of the weak ferromagnetism of bulk cuprates, propagates the magnetisation from the interface CuO2 planes into the superconductor, eventually depressing its critical temperature.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1265273
- Journal Information:
- Nature Communications, Journal Name: Nature Communications Vol. 5; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Design of Complex Oxide Interfaces by Oxide Molecular Beam Epitaxy
|
journal | October 2019 |
Proximity effects across oxide-interfaces of superconductor-insulator-ferromagnet hybrid heterostructure
|
journal | February 2018 |
Similar Records
Selective interlayer ferromagnetic coupling between the Cu spins in YBa2Cu3O7–x grown on top of La0.7Ca0.3MnO3
Orbital Hybridization and Magnetic Coupling at Cuprate–Manganite Interfaces Driven by Manganite Doping
Journal Article
·
Mon Nov 16 19:00:00 EST 2015
· Scientific Reports
·
OSTI ID:1228034
Orbital Hybridization and Magnetic Coupling at Cuprate–Manganite Interfaces Driven by Manganite Doping
Journal Article
·
Tue May 05 20:00:00 EDT 2020
· Advanced Quantum Technologies
·
OSTI ID:1677670