Interfacial Magnetism in Manganite Superlattices
arXiv:1306.3453 · doi:10.1103/PhysRevB.88.115136
Abstract
We use a two-orbital double-exchange model including Jahn-Teller lattice distortions, superexchange interactions, and long-range Coulomb (LRC) interactions to investigate the origin of magnetically disordered interfaces between ferromagnetic metallic (FM) and antiferromagnetic insulating (AFI) manganites in FM/AFI superlattices. The induced magnetic moment in the AFI layer varies non-monotonically with increasing AFI layer width as seen in the experiment. We provide a framework for understanding this non-monotonic behavior which has a one-to-one correspondence with the magnetization of the FM interface. The obtained insights provide a basis for improving the tunneling magnetoresistance in FM/AFI manganite superlattices by avoiding a magnetic dead layer (MDL) in the FM manganite.
5 pages, 5 figures. To appear in PRB
References in corpus (9)
- Oxide spintronics
- Understanding interface effects in perovskite thin films
- The Distinct Effects of Homogeneous Weak Disorder and Dilute Strong Scatterers on Phase Competetion in the Manganites
- Suppressed Magnetization at the Surfaces and Interfaces of Ferromagnetic Metallic Manganites
- Nanoscale magnetic structure of ferromagnet/antiferromagnet manganite multilayers
- Magnetoresistance in an all-manganite heterostructure
- Domain Formation and Orbital Ordering Transition in a Doped Jahn-Teller Insulator
- Exploiting B Site Disorder for Phase Control in the Manganites
- Electronic and Magnetic Reconstructions in Manganite Superlattices