Electrical-field and spin-transfer torque effects in CoFeB/MgO-based perpendicular magnetic tunnel junction

Journal Article · Sun May 15 00:00:00 EDT 2016 · AIP Advances

DOI:https://doi.org/10.1063/1.4943764· OSTI ID:22611735

Yoshida, Chikako; Noshiro, Hideyuki; Yamazaki, Yuichi; Sugii, Toshihiro ^[1]; Furuya, Atsushi; Ataka, Tadashi; Tanaka, Tomohiro; Uehara, Yuji ^[2]

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1. Fujitsu limited, 10-1 Morinosato-Wakamiya, Atsugi, Kanagawa, 243-0197 (Japan)
2. Fujitsu limited, 4-1-1 Kamikodanaka, Nakahara-ku, Kawasaki, Kanagawa, 211-8588 (Japan)

The electric-field (E) dependence of the magnetoresistance (RH) loops for top-pinned perpendicular CoFeB/MgO-based magnetic tunnel junctions (MTJs) in the presence of a spin-transfer torque (STT)-current was measured. The E effects were distinguished from the STT-current effects using a micromagnetic simulation. The coercive field (H{sub c}) decreased and the RH loop shifted as both the positive and negative bias E increased owing to the STT current. Furthermore, E-assisted switching for an MTJ with a diameter of 20 nm, which exhibited a nearly coherent magnetization reversal, was demonstrated using micromagnetic simulation.

• OSTI ID: 22611735
• Journal Information: AIP Advances, Journal Name: AIP Advances Journal Issue: 5 Vol. 6; ISSN AAIDBI; ISSN 2158-3226
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BORON COMPOUNDS
COBALT COMPOUNDS
ELECTRIC FIELDS
IRON COMPOUNDS
MAGNESIUM OXIDES
MAGNETIC TUNNEL JUNCTIONS
MAGNETIZATION
MAGNETORESISTANCE
SIMULATION
SPIN
TORQUE