Magnetic coupling at perovskite and rock-salt structured interfaces

Journal Article · Mon Oct 05 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4931705· OSTI ID:22482198

Ahvenniemi, E. ^[1]; Takahashi, R.; Lippmaa, M. ^[2]

---

1. Department of Chemistry, Aalto University, Kemistintie 1, 02150 Espoo (Finland)
2. Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, 277-8581 Chiba (Japan)

We study magnetic coupling between hole-doped manganite layers separated by either a perovskite or a rock-salt barrier of variable thickness. Both the type and the quality of the interface have a strong impact on the minimum critical barrier thickness where the manganite layers become magnetically decoupled. A rock-salt barrier layer only 1 unit cell (0.5 nm) thick remains insulating and is able to magnetically de-couple the electrode layers. The technique can therefore be used for developing high-performance planar oxide electronic devices such as magnetic tunnel junctions and quantum well structures that depend on magnetically and electronically sharp heterointerfaces.

• OSTI ID: 22482198
• Journal Information: Applied Physics Letters, Vol. 107, Issue 14; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DEPLETION LAYER
ELECTRODES
ELECTRONIC EQUIPMENT
INTERFACES
OXIDES
PEROVSKITE
QUANTUM WELLS
SALT DEPOSITS
THICKNESS
TUNNEL EFFECT