Document Type

Article

Publication Date

2-18-2005

Abstract

Epitaxial Cr-doped Ti2O3 films show giant negative magnetoresistance up to −365% at 2 K. The resistivity of the doped samples follows the behavior expected of spin smagneticd polarons at low temperature. Namely, r =r0 expsT0 /Tdp, where p=0.5 in zero field. A large applied field quenches the spin polarons and p is reduced to 0.25 expected for lattice polarons. The formation of spin polarons is an indication of strong exchange coupling between the magnetic ions and holes in the system. © 2005 American Institute of Physics.

DOI

10.1063/1.1874302

Comments

Copyright 2005 AIP (American Institute of Physics) Publishing LLC.

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