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Enhanced and oscillatory magnetoresistance of thin Fe(001) films

AuthorsMartínez Boubeta, Carlos ; Balcells Argemi, Lluis; Cebollada, Alfonso
KeywordsEnhanced magnetoresistance
Magnetic epitaxial layers
Ferromagnetic materials
Sputter deposition
Magnesium compounds
Magnetic anisotropy
Issue Date29-Mar-2006
PublisherAmerican Institute of Physics
CitationApplied Physics Letters, 88 (2006)
AbstractWe have studied the magnetoresistance of single-crystalline (001) Fe films prepared by sputtering techniques and covered by epitaxial MgO or Pt protective layers. The influence of the thickness of the magnetic layer as well as of the nature of the capping layer on the Fe anisotropic magnetoresistance was investigated by four-terminal probe, measurements performed with the current J in the [110] magnetically hard direction. We found an enhancement in the magnetoresistance value with respect to bulk and oscillations in the high field regime in MgO covered Fe/MgO(001) ultrathin films. A plausible explanation is that the enhanced magnetoresistance is due to electronic confinement effects, not present in similar Pt/Fe/MgO(001) samples.
Publisher version (URL)http://link.aip.org
Appears in Collections:(IMN-CNM) Artículos
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