Enhanced and oscillatory magnetoresistance of thin Fe„001... films
نویسندگان
چکیده
We 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. © 2006 American Institute of Physics. DOI: 10.1063/1.2191092
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