Interfacial Control of Magnetic Properties at LaMnO3/LaNiO3 Interfaces
M Gibert1, M Viret1,2, A Torres-Pardo3
1Département de Physique de la Matière Quantique, University of Geneva , Geneva, Switzerland.
Nano Letters
|October 21, 2015
Summary
Interface engineering in oxide heterostructures like LaMnO3/LaNiO3 controls electronic and magnetic properties. Monolayer intermixing allows tuning of charge transfer and magnetic moments, crucial for novel material functionalities.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Solid State Chemistry
Background:
- Functional properties of oxide heterostructures are determined by interface accommodation of electronic and structural mismatches.
- LaMnO3/LaNiO3 heterostructures exhibit inherent interface structural asymmetry based on growth sequence.
Purpose of the Study:
- To investigate the influence of growth sequence on interface asymmetry in LaMnO3/LaNiO3 heterostructures.
- To understand how monolayer intermixing controls interface-driven properties like charge transfer and magnetic moments.
- To determine the impact of interface reconstructions on the magnetic state of strained LaMnO3 thin films.
Main Methods:
- Utilized a variety of synchrotron-based techniques for in-situ analysis.
- Investigated monolayer-scale intermixing at the heterostructure interface.
- Examined the magnetic state of strained LaMnO3 thin films.
Main Results:
- Demonstrated control over interface-driven properties, including charge transfer and induced magnetic moments in the nickelate layer, via monolayer intermixing.
- Showcased that the magnetic state of strained LaMnO3 thin films is highly sensitive to interface reconstructions.
- Confirmed intrinsic interface structural asymmetry in LaMnO3/LaNiO3 heterostructures dependent on growth sequence.
Conclusions:
- Interface engineering through controlled intermixing is a viable strategy to tune the functional properties of oxide heterostructures.
- Understanding and controlling interface reconstructions are critical for tailoring the magnetic and electronic behavior of complex oxide materials.
- Growth sequence plays a pivotal role in determining interface properties and subsequent material functionality.
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