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Micromagnetic Study of Influence of Gd Content on Current-Induced Domain Wall Motion in a Ferrimagnetic Nanowire
Jo KAJITANI Takashi KOMINE Ryuji SUGITA
IEICE TRANSACTIONS on Electronics
Publication Date: 2013/12/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Advanced Elementary Technologies for Information Storage)
current-induced domain wall motion, ferrimagnetic nanowires, rare-earth metal composition, intrinsic critical current density,
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In this study, the influence of Gd composition on current-induced domain wall motion in a Gd-Co ferrimagnetic nanowire was theoretically investigated with taking into account of composition dependence of magnetic properties. As a result, the intrinsic critical density to move domain wall significantly reduces near the compensation composition, which is achieved to be less than 105A/cm2. Moreover, the intrinsic critical current density also significantly reduces near a certain Gd composition where the domain wall energies of Bloch and Néel walls are almost the same.