The effects of oxygen pressure on disordering and magneto-transport properties of Ba{sub 2}FeMoO{sub 6} thin films grown via pulsed laser deposition

Epitaxial Ba{sub 2}FeMoO{sub 6} thin films were grown via pulsed laser deposition under low oxygen pressure and their structural, chemical, and magnetic properties were examined, focusing on the effects of oxygen pressure. The chemical disorder, off-stoichiometry in B site cations (Fe and Mo) increa...

Full description

Saved in:
Bibliographic Details
Published in:Journal of applied physics 2015-07, Vol.118 (3)
Main Authors: Kim, Kyeong-Won, Mhin, Sungwook, Jones, Jacob L., Norton, David P., Ghosh, Siddhartha, Buvaev, Sanal, Hebard, Arthur F.
Format: Article
Language:English
Subjects:
CATIONS
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
ENERGY BEAM DEPOSITION
EPITAXY
HALL EFFECT
LASER RADIATION
MAGNETIC FIELDS
MAGNETIC PROPERTIES
MAGNETORESISTANCE
OXYGEN
PEROVSKITE
PULSED IRRADIATION
SEGREGATION
SPIN ORIENTATION
STOICHIOMETRY
THIN FILMS
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Epitaxial Ba{sub 2}FeMoO{sub 6} thin films were grown via pulsed laser deposition under low oxygen pressure and their structural, chemical, and magnetic properties were examined, focusing on the effects of oxygen pressure. The chemical disorder, off-stoichiometry in B site cations (Fe and Mo) increased with increasing oxygen pressure and thus magnetic properties were degraded. Interestingly, in contrast, negative magneto-resistance, which is the characteristics of this double perovskite material, was enhanced with increasing oxygen pressure. It is believed that phase segregation of highly disordered thin films is responsible for the increased magneto-resistance of thin films grown at high oxygen pressure. The anomalous Hall effect, which behaves hole-like, was also observed due to spin-polarized itinerant electrons under low magnetic field below 1 T and the ordinary electron-like Hall effect was dominant at higher magnetic fields.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4923354