Laser Microscopy of Tunneling Magnetoresistance in Manganite Grain-Boundary Junctions

M. Wagenknecht, H. Eitel, T. Nachtrab, J. B. Philipp, R. Gross, R. Kleiner, and D. Koelle
Phys. Rev. Lett. 96, 047203 – Published 30 January 2006

Abstract

Using low-temperature scanning laser microscopy we directly image electric transport in a magnetoresistive element, a manganite thin film intersected by a grain boundary (GB). Imaging at variable temperature allows reconstruction and comparison of the local resistance versus temperature for both the manganite film and the GB. Imaging at low temperature also shows that the GB switches between different resistive states due to the formation and growth of magnetic domains along the GB. We observe different types of domain wall growth; in most cases a domain wall nucleates at one edge of the bridge and then proceeds towards the other edge.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 22 July 2005

DOI:https://doi.org/10.1103/PhysRevLett.96.047203

©2006 American Physical Society

Authors & Affiliations

M. Wagenknecht1, H. Eitel1, T. Nachtrab1, J. B. Philipp2, R. Gross2, R. Kleiner1, and D. Koelle1,*

  • 1Physikalisches Institut—Experimentalphysik II, Universität Tübingen, Auf der Morgenstelle 14, D-72076 Tübingen, Germany
  • 2Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, Walther-Meissner-Strasse 8, D-85748 Garching, Germany

  • *Electronic address: koelle@uni-tuebingen.de

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 96, Iss. 4 — 3 February 2006

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×