Spin-locking effect in the nanoscale ordered perovskite cobaltite LaBaCo2O6

Asish K. Kundu, E.-L. Rautama, Ph. Boullay, V. Caignaert, V. Pralong, and B. Raveau
Phys. Rev. B 76, 184432 – Published 27 November 2007

Abstract

A nanoscale ordered perovskite cobaltite, which consists of 90° ordered domains of the layered “112” LaBaCo2O6, has been evidenced by high resolution-transmission electron microscopy. This form, such as the disordered La0.5Ba0.5CoO3 and ordered LaBaCo2O6, exhibits a ferromagnetic transition at TC179K. However, it differs from the two previous forms by its strong magnetic anisotropy and, correlatively, by its high value of coercivity (4.2kOe) at low temperature. We suggest that this behavior originates from the locking of magnetic spins in the 90° oriented nanodomain. Moreover, one observes a semimetal to semimetal transition at TC with a maximum magnetoresistance of 6.5% at this temperature.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 23 July 2007

DOI:https://doi.org/10.1103/PhysRevB.76.184432

©2007 American Physical Society

Authors & Affiliations

Asish K. Kundu*, E.-L. Rautama, Ph. Boullay, V. Caignaert, V. Pralong, and B. Raveau

  • CRISMAT Laboratory, 6 Boulevard Maréchal Juin, Caen 14050, France

  • *Corresponding author. FAX: +33-231-951600. asish.kundu@ensicaen.fr

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 76, Iss. 18 — 1 November 2007

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 B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×