Exploiting B Site Disorder for Phase Control in the Manganites

Abstract

Disorder on the active d element site is usually very disruptive for conduction and long range order in perovskite transition metal oxides. However, in the background of phase competition such `B site' dopants also act to promote one ordered phase at the expense of another. This occurs either through valence change of the transition metal or via creation of `defects' in the parent magnetic state. We provide a framework for understanding the complex variety of phenomena observed in B site doped manganites and identify the key parameters that control the physics. Using a spatially resolved analysis of B ions in various manganite phases we explain the existing data and predict new situations where highly polarisable phase separated states can be created.

5 pages, pdflatex, 5 png figures

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Cited by in corpus (8)

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• Non-magnetic B-site Impurities Induce Ferromagnetic Tendencies in CE Manganites
• Electronic and Magnetic Reconstructions in Manganite Superlattices
• Interfacial Magnetism in Manganite Superlattices
• Influence of B - site Disorder in $L{a}_{0.5}C{a}_{0.5}M{n}_{1-x}{B}_x{O}_3$ (B = Fe, Ru, Al and Ga) Manganites
• Nanoclustering phase competition induces the resistivity hump in colossal magnetoresistive manganites
• Collapse of ferromagnetism with Ti doping in Sm${}_{0.55}$Sr${}_{0.45}$MnO${}_3$: A combined experimental and theoretical study
• Magnetic Reconstructions in B-site Doped Manganites