Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Impurity-assisted interlayer exchange coupling across a tunnel barrier.

M Ye Zhuravlev1, E Y Tsymbal, A V Vedyayev

  • 1Department of Physics and Astronomy, Center for Materials Research and Analysis, University of Nebraska, Lincoln, Nebraska 68588, USA.

Physical Review Letters
|February 9, 2005
PubMed
Summary

Localized impurities in insulating barriers significantly enhance interlayer exchange coupling (IEC) between ferromagnetic films. This impurity-assisted IEC can become antiferromagnetic and weakens with increasing temperature, explaining experimental observations.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Ferroelectric Spin-Orbit Valve Effect.

Physical review letters·2025
Same author

In-plane quasi-single-domain BaTiO<sub>3</sub> via interfacial symmetry engineering.

Nature communications·2021
Same author

Planar Hall effect in two-layered ferroelectric-ferromagnetic system.

Journal of physics. Condensed matter : an Institute of Physics journal·2021
Same author

Controlling spin current polarization through non-collinear antiferromagnetism.

Nature communications·2020
Same author

Anisotropic spin-orbit torque generation in epitaxial SrIrO<sub>3</sub> by symmetry design.

Proceedings of the National Academy of Sciences of the United States of America·2019
Same author

Isostructural metal-insulator transition in VO<sub>2</sub>.

Science (New York, N.Y.)·2018

Area of Science:

  • Condensed matter physics
  • Materials science
  • Spintronics

Background:

  • Interlayer exchange coupling (IEC) is crucial for spintronic devices.
  • The properties of insulating barrier layers significantly influence IEC.
  • Understanding defect states in barriers is key to controlling magnetic coupling.

Purpose of the Study:

  • To investigate the impact of localized impurity or defect states on IEC.
  • To determine the conditions under which impurity-assisted IEC becomes antiferromagnetic.
  • To explain experimental observations of IEC across tunnel barriers.

Main Methods:

  • Theoretical modeling of impurity states within insulating barriers.
  • Analysis of the energy levels of defect states relative to the Fermi energy.

Related Experiment Videos

  • Temperature-dependent calculations of coupling strength.

    • Main Results:

    • Impurity or defect states dramatically strengthen IEC compared to perfect barriers.
    • Impurity-assisted IEC exhibits antiferromagnetic coupling when impurity states align with the Fermi energy.
    • Coupling strength decreases with increasing temperature.

    Conclusions:

    • Localized defects in tunnel barriers are critical for tuning IEC.
    • The energy alignment of defect states dictates the magnetic coupling's nature (ferromagnetic vs. antiferromagnetic).
    • The findings provide a theoretical framework for experimental IEC data in magnetic tunnel junctions.