skip to main content

Title: Magnetotransport properties of spin-valve structures with Mg spacer layers

A theoretical prediction by Wang et al. [Phys. Rev. B 82, 054405 (2010)] suggests the preferential transmission of majority-spin states with Δ{sub 1} symmetry across a magnesium interlayer in Fe/Mg/MgO/Fe based magnetic tunnel junctions. Here, we report experiments to probe this question in CoFe/Mg/CoFe structures. We find that the strength of the interlayer coupling decays exponentially with increasing the spacer thickness, however, a non-monotonic variation of the magnetoresistance as a function of the Mg layer is observed. These data may help revisit the role of the insertion of a Mg interface layer in MgO-based devices.
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. Departament d'Electrònica and IN2UB, Universitat de Barcelona, 08028 Barcelona (Spain)
  2. Technische Universität Kaiserslautern, 67663 Kaiserslautern (Germany)
  3. (Germany)
  4. IBM Research Division, Almaden Research Center, San Jose, California 95120 (United States)
Publication Date:
OSTI Identifier:
22415149
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 3; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COBALT COMPOUNDS; IRON; IRON COMPOUNDS; LAYERS; MAGNESIUM; MAGNESIUM OXIDES; MAGNETORESISTANCE; SPIN; SUPERCONDUCTING JUNCTIONS; SYMMETRY; TUNNEL EFFECT