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Title: Numerical analysis of thermally assisted spin-transfer torque magnetization reversal in synthetic ferrimagnetic free layers

Abstract

The spin transfer torque magnetization reversal of synthetic ferrimagnetic free layers under pulsed temperature rise was numerically studied by solving the Landau–Lifshitz–Gilbert equation, taking into account the stochastic random fields, the temperature dependence of magnetic parameters, and the spin torque terms. The anti-parallel magnetization configuration was retained at the elevated temperature, due to interlayer dipole coupling. A significant thermal assistance effect, resulting in a 40% reduction in the switching current, was demonstrated during a nanosecond pulsed temperature rise up to 77% of the Curie temperature.

Authors:
; ; ;  [1]
  1. ISEE, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395 (Japan)
Publication Date:
OSTI Identifier:
22410101
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COUPLING; CURIE POINT; DIFFERENTIAL EQUATIONS; DIPOLES; FERRIMAGNETIC MATERIALS; FERRIMAGNETISM; MAGNETIZATION; NUMERICAL ANALYSIS; RANDOMNESS; SPIN; STOCHASTIC PROCESSES; TEMPERATURE DEPENDENCE; TORQUE

Citation Formats

Shen, J., Shi, M., Tanaka, T., E-mail: t-tanaka@ed.kyushu-u.ac.jp, and Matsuyama, K. Numerical analysis of thermally assisted spin-transfer torque magnetization reversal in synthetic ferrimagnetic free layers. United States: N. p., 2015. Web. doi:10.1063/1.4917005.
Shen, J., Shi, M., Tanaka, T., E-mail: t-tanaka@ed.kyushu-u.ac.jp, & Matsuyama, K. Numerical analysis of thermally assisted spin-transfer torque magnetization reversal in synthetic ferrimagnetic free layers. United States. doi:10.1063/1.4917005.
Shen, J., Shi, M., Tanaka, T., E-mail: t-tanaka@ed.kyushu-u.ac.jp, and Matsuyama, K. Thu . "Numerical analysis of thermally assisted spin-transfer torque magnetization reversal in synthetic ferrimagnetic free layers". United States. doi:10.1063/1.4917005.
@article{osti_22410101,
title = {Numerical analysis of thermally assisted spin-transfer torque magnetization reversal in synthetic ferrimagnetic free layers},
author = {Shen, J. and Shi, M. and Tanaka, T., E-mail: t-tanaka@ed.kyushu-u.ac.jp and Matsuyama, K.},
abstractNote = {The spin transfer torque magnetization reversal of synthetic ferrimagnetic free layers under pulsed temperature rise was numerically studied by solving the Landau–Lifshitz–Gilbert equation, taking into account the stochastic random fields, the temperature dependence of magnetic parameters, and the spin torque terms. The anti-parallel magnetization configuration was retained at the elevated temperature, due to interlayer dipole coupling. A significant thermal assistance effect, resulting in a 40% reduction in the switching current, was demonstrated during a nanosecond pulsed temperature rise up to 77% of the Curie temperature.},
doi = {10.1063/1.4917005},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 17,
volume = 117,
place = {United States},
year = {2015},
month = {5}
}