title: Magnetic properties of epitaxial discontinuous Fe/MgO multilayers.
abstract: We report magnetic, dynamic and transport properties of discontinuous metal-insulator multilayers Fe/MgO grown on amorphous Corning glass and single-crystalline MgO (001) substrates. The films of structure Substrate/MgO (3 nm)/[Fe (0.6 nm)/MgO (3.0 nm)] x 10 were prepared in ultra-high vacuum conditions using Pulsed Laser Deposition. It was shown that conditions of epitaxial growth are favorable for MgO substrates. As a result a substantial increase of tunneling magnetoresistance caused by spin-filtering effect was observed and reasonably theoretically explained. The value of TMR - 9.2% at room temperature in 18 kOe magnetic field is three times higher comparing to that for the samples grown on Corning glass substrates.
authors.affiliation: ICMA, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain.
authors.forename: A
authors.initials: A
authors.lastname: García-García
authors.forename: J A
authors.initials: JA
authors.lastname: Pardo
authors.forename: P
authors.initials: P
authors.lastname: Strichovanec
authors.forename: C
authors.initials: C
authors.lastname: Magén
authors.forename: A
authors.initials: A
authors.lastname: Vovk
authors.forename: J M
authors.initials: JM
authors.lastname: De Teresa
authors.forename: G N
authors.initials: GN
authors.lastname: Kakazei
authors.forename: Yu G
authors.initials: YG
authors.lastname: Pogorelov
authors.forename: V
authors.initials: V
authors.lastname: Golub
authors.forename: O
authors.initials: O
authors.lastname: Salyuk
authors.forename: L
authors.initials: L
authors.lastname: Morellón
authors.forename: P A
authors.initials: PA
authors.lastname: Algarabel
authors.forename: M R
authors.initials: MR
authors.lastname: Ibarra