Voltage-induced switching in magnetic tunnel junctions with perpendicular magnetic anisotropy

Weigang Wang, C. L. Chien

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Spintronic devices can be operated by either a magnetic field or a spin polarized current; however, the former is not site-specific, and the latter suffers from large current density issues. In this work, we show that voltage-controlled spintronic devices offer many attributes. Although a metallic ferromagnet responds only very weakly to an electric field if at all, under special circumstances an electric field can have a profound impact on its magnetic properties. An electric field can alter the interfacial perpendicular magnetic anisotropy (PMA) of CoFeB/MgO/CoFeB magnetic tunnel junctions (MTJs) in a prescribed manner. By exploiting the voltage dependence of the PMA we have accomplished voltage-controlled MTJ for which the high- and low-resistance states can be accessed reversibly and repeatedly by voltage pulses associated with very low current density in the range of 104 A cm-2. This development opens up a new avenue to achieve ultra-low power consumption and ultra-fast operation in next-generation spintronic devices.

Original languageEnglish (US)
Article number074004
JournalJournal of Physics D: Applied Physics
Volume46
Issue number8
DOIs
StatePublished - Feb 20 2013

Fingerprint

Tunnel junctions
Magnetic anisotropy
tunnel junctions
Magnetoelectronics
anisotropy
Electric fields
Electric potential
electric potential
electric fields
Current density
current density
low resistance
high resistance
low currents
Magnetic properties
Electric power utilization
Magnetic fields
magnetic properties
pulses
magnetic fields

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

Cite this

Voltage-induced switching in magnetic tunnel junctions with perpendicular magnetic anisotropy. / Wang, Weigang; Chien, C. L.

In: Journal of Physics D: Applied Physics, Vol. 46, No. 8, 074004, 20.02.2013.

Research output: Contribution to journalArticle

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