Interfacial Magnetism in Manganite Superlattices
Autor: | Pradhan, Kalpataru, Kampf, Arno P. |
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Rok vydání: | 2013 |
Předmět: | |
Zdroj: | Phys. Rev. B 88, 115136 (2013) |
Druh dokumentu: | Working Paper |
DOI: | 10.1103/PhysRevB.88.115136 |
Popis: | 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. Comment: 5 pages, 5 figures. To appear in PRB |
Databáze: | arXiv |
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