Large, Controllable Spikes of Magnetoresistance in La2/3Ca1/3MnO3/SrTiO3 Superlattices
作者： Sergey A. Fedoseev , Alexey V. Pan , Sergey Rubanov , Igor A. Golovchanskiy , Olga V. Shcherbakova
DOI: 10.1021/NN304127N
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摘要: We have investigated superlattices consisting of up to 30 epitaxial nanomultilayers (3–7 nm thick) ferromagnetic La2/3Ca1/3MnO3 (LCMO) and insulating SrTiO3 (STO) hybrids. The demonstrate dramatic shifts Curie temperature, indicating the possibility its tunability. metal–insulator transition (MIT) has been observed around 140 K. Below MIT shown sharp drops resistivity, facilitating largest sharpest magnetoresistance peaks (>2000%) ever in LCMO films at low temperatures. experimental results can be explained frame phase separation model manganites with well-organized structures. magnetic transport measurements such hybrid structures are discussed, a magnetodielectric effect STO interlayers. properties technology-dependent, experiencing dimensional transitions, which enables t...
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