Micromagnetic Study of Influence of Gd Content on Current-Induced Domain Wall Motion in a Ferrimagnetic Nanowire

Jo KAJITANI  Takashi KOMINE  Ryuji SUGITA  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E96-C   No.12   pp.1515-1519
Publication Date: 2013/12/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E96.C.1515
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Advanced Elementary Technologies for Information Storage)
Category: 
Keyword: 
current-induced domain wall motion,  ferrimagnetic nanowires,  rare-earth metal composition,  intrinsic critical current density,  

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Summary: 
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.