Skip to main content

Effect of Grain Boundaries on the Local Electronic Transport in Nanostructured Films of Colossal Magnetoresistive Manganites

Buy Article:

$105.00 plus tax (Refund Policy)

We have studied the spatially resolved local electronic properties of nanostructured films of a colossal magnetoresistive (CMR) material by local conductance mapping (LCMAP) using a variable temperature scanning tunneling microscope (STM), as a function of temperature and magnetic field. The experiments were carried out on nanostructured (NS) films of rare-earth hole doped manganites like La0.67Sr0.33MnO3 (LSMO), (prepared by Chemical Solution Deposition (CSD)) having average grain sizes around 100 nm or less. Due to the presence of a large number of natural grain boundaries (GBs), these films exhibit interesting transport properties that are not observed in single crystals and epitaxial films of the same composition, such as low field magnetoresistance (LFMR), and significant MR at higher fields over the entire temperature range. Spatially resolved measurements of electronic properties, like the LCMAP, traces the contribution of the grain boundaries to the electronic transport in these NS films. It is found that the application of a low magnetic field enhances the DOS in the GB region, leading to the observed low field response of the MR.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics


Document Type: Research Article

Publication date: 01 June 2007

More about this publication?
  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Terms & Conditions
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more