Spin-polarized tunneling in nanostructured La<inf>2/3</inf>Sr<inf>1/3</inf>MnO<inf>3</inf>

Abstract:

We present magnetic and transport properties of nanocrystalline La2/3Sr1/3MnO3 powders prepared by a gel-combustion method using citric acid as the fuel. The coercive magnetic field Hc is significantly different to the field H*c for which the magnetoresistance (MR) is maximum. The MR at low fields (LFMR) exhibits a power-law dependence with magnetization, MR ∝ Mn, with n = 2.5-3.3 for temperatures ranging from 5 to 200 K. The results are discussed in terms of a distribution of particle size in our sample. © 2002 Elsevier Science B.V. All rights reserved.

Año de publicación:

2002

Keywords:

• Spin-polarized tunneling
• Nanostructured materials
• Low-field magnetoresistance

Fuente:

scopus