Tuning the metal-insulator transition in manganite films through surface exchange coupling with magnetic nanodots

Abstract

In strongly correlated electronic systems, such as manganites, the global transport behavior depends sensitively on the spin ordering, whose alteration often requires a large external magnetic field. Here we show that the spin ordering in manganites can be easily controlled by exchange field across the interface between a ferromagnet and a manganite. By depositing isolated ferromagnetic nanodots on a manganite thin film, we find that it is possible to overcome dimensionality and strain effects to raise the metal-insulator transition (MIT) temperature by over 200 K and increase the magnetoresistance by 5000%. The MIT temperature can also be tuned by controlling the density of the magnetic nanodots which indicates that the formation process of electronic phase separation can be controlled by the presence of magnetic nanodots.

References in corpus (6)

• Complexity in Strongly Correlated Electronic Systems
• Coexisting charge modulation and ferromagnetism produces long period phases in manganites: new example of electronic soft matter
• Relevance of Cooperative Lattice Effects and Correlated Disorder in Phase-Separation Theories for CMR Manganites
• Strain driven charge-ordered state in La${}_{0.67}$Ca${}_{0.33}$MnO${}_3$
• Modelling of strain effects in manganite films
• Separation of the strain and finite size effect on the ferromagnetic properties of La_{0.5}Sr_{0.5}CoO_3 thin films

Cited by in corpus (3)

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