Skip to main content

Large, controllable spikes of magnetoresistance in La2/3Ca 1/3MnO3/SrTiO3 superlattices

Journal Article


Abstract


  • We have investigated superlattices consisting of up to 30 epitaxial nanomultilayers (3-7 nm thick) of ferromagnetic La2/3Ca 1/3MnO3 (LCMO) and insulating SrTiO3 (STO) hybrids. The superlattices demonstrate dramatic shifts of Curie temperature, indicating the possibility of its tunability. The metal-insulator transition (MIT) has been observed around 140 K. Below the MIT temperature, the superlattices have shown sharp drops of resistivity, facilitating the largest and sharpest magnetoresistance peaks (>2000%) ever observed in LCMO films and superlattices at low temperatures. The observed experimental results can be explained in the frame of the phase separation model in manganites with well-organized structures. The results of magnetic and transport measurements of such hybrid structures are discussed, indicating a magnetodielectric effect in STO interlayers. The magnetic and transport properties of the superlattices are shown to be technology-dependent, experiencing dimensional transitions, which enables the creation of structures with prescribed magnetoresistance characteristics for a broad range of applications.

UOW Authors


  •   Fedoseev, Sergey (external author)
  •   Pan, Alexey
  •   Rubanov, Sergey (external author)
  •   Golovchanskiy, Igor A. (external author)
  •   Shcherbakova, Olga V. (external author)

Publication Date


  • 2013

Citation


  • Fedoseev, S. A., Pan, A. V., Rubanov, S., Golovchanskiy, I. A. & Shcherbakova, O. V. (2013). Large, controllable spikes of magnetoresistance in La2/3Ca 1/3MnO3/SrTiO3 superlattices. ACS Nano, 7 (1), 286-293.

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/849

Number Of Pages


  • 7

Start Page


  • 286

End Page


  • 293

Volume


  • 7

Issue


  • 1

Abstract


  • We have investigated superlattices consisting of up to 30 epitaxial nanomultilayers (3-7 nm thick) of ferromagnetic La2/3Ca 1/3MnO3 (LCMO) and insulating SrTiO3 (STO) hybrids. The superlattices demonstrate dramatic shifts of Curie temperature, indicating the possibility of its tunability. The metal-insulator transition (MIT) has been observed around 140 K. Below the MIT temperature, the superlattices have shown sharp drops of resistivity, facilitating the largest and sharpest magnetoresistance peaks (>2000%) ever observed in LCMO films and superlattices at low temperatures. The observed experimental results can be explained in the frame of the phase separation model in manganites with well-organized structures. The results of magnetic and transport measurements of such hybrid structures are discussed, indicating a magnetodielectric effect in STO interlayers. The magnetic and transport properties of the superlattices are shown to be technology-dependent, experiencing dimensional transitions, which enables the creation of structures with prescribed magnetoresistance characteristics for a broad range of applications.

UOW Authors


  •   Fedoseev, Sergey (external author)
  •   Pan, Alexey
  •   Rubanov, Sergey (external author)
  •   Golovchanskiy, Igor A. (external author)
  •   Shcherbakova, Olga V. (external author)

Publication Date


  • 2013

Citation


  • Fedoseev, S. A., Pan, A. V., Rubanov, S., Golovchanskiy, I. A. & Shcherbakova, O. V. (2013). Large, controllable spikes of magnetoresistance in La2/3Ca 1/3MnO3/SrTiO3 superlattices. ACS Nano, 7 (1), 286-293.

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/849

Number Of Pages


  • 7

Start Page


  • 286

End Page


  • 293

Volume


  • 7

Issue


  • 1