High thermal stability and low driven current achieved by vertical domain wall motion memory with artificial ferromagnet

To enhance thermal stability while keeping low driven current is difficult in traditional domain wall (DW) motion devices. The increasing of energy barrier for thermal stability inevitably results in the enhancement of driven current. We numerically investigate depinning field ( H depin ) and critic...

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Bibliographic Details
Published in:Applied physics express 2021-02, Vol.14 (2), p.23001
Main Authors: Hung, Yu Min, Shiota, Yoichi, Hisatomi, Ryusuke, Moriyama, Takahiro, Ono, Teruo
Format: Article
Language:English
Subjects:
artificial ferromagnet
critical current density
depinning field
domain wall motion memory
thermal stability
uniaxial magnetic anisotropy
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Summary:To enhance thermal stability while keeping low driven current is difficult in traditional domain wall (DW) motion devices. The increasing of energy barrier for thermal stability inevitably results in the enhancement of driven current. We numerically investigate depinning field ( H depin ) and critical current density ( J c ) for DW motion as a function of uniaxial magnetic anisotropy ( K u ) in vertical DW motion memory with artificial ferromagnet. It is found that H depin and J c show different K u dependence. The results indicate that it is promising to simultaneously achieve high thermal stability and low driven current in artificial ferromagnet based DW motion devices.
ISSN:1882-0778
1882-0786
DOI:10.35848/1882-0786/abd86a