Giant negative magnetoresi stance of spin polarons in magnetic semiconductors-chromium-doped Ti2O3 thin films
UNSPECIFIED. (2005) Giant negative magnetoresi stance of spin polarons in magnetic semiconductors-chromium-doped Ti2O3 thin films. APPLIED PHYSICS LETTERS, 86 (8). -. ISSN 0003-6951Full text not available from this repository.
Official URL: http://dx.doi.org/10.1063/1.1874302
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 (magnetic) polarons at low temperature. Namely, rho=rho(0) exp(T-0/T)(p), 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. (c) 2005 American Institute of Physics.
|Item Type:||Journal Article|
|Subjects:||Q Science > QC Physics|
|Journal or Publication Title:||APPLIED PHYSICS LETTERS|
|Publisher:||AMER INST PHYSICS|
|Date:||21 February 2005|
|Number of Pages:||3|
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