Effective Damping Constant and Current Induced Magnetization Switching of GdFeCo/TbFe Exchange-Coupled Bilayers
抄録
The Gilbert damping constants α and effective perpendicular magnetic anisotropies Keff of amorphous GdFeCo (10 - x nm)/TbFe (x nm) exchange-coupled bilayers with various TbFe layer thicknesses x were measured. The products α × Keff of the bilayers were compared with the critical current densities Jc for current-induced magnetization switching (CIMS) in giant magnetoresistance nanopillars with a GdFeCo/TbFe memory layer. The damping constant α of the bilayers, estimated from time-resolved magneto-optical Kerr effect measurements, was 0.051 for x = 0, and was significantly enhanced to 0.23 for x = 1. The anisotropy constant Keff and the product of saturation magnetization times anisotropy field Ms Hk also increased with increasing TbFe thickness x. The CIMS of the GdFeCo (9 nm)/TbFe (1 nm) bilayer exhibited 1.6 times larger Jc than that of GdFeCo (10 nm), while the product α × Keff increased by a factor of 10.
Article Sequence Number: 3505605
収録刊行物
-
- IEEE Magnetics Letters
-
IEEE Magnetics Letters 7 1-5, 2016-07-28
IEEE
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1050282813781604736
-
- NII論文ID
- 120005895204
-
- HANDLE
- 2237/25201
-
- ISSN
- 1949307X
-
- 本文言語コード
- en
-
- 資料種別
- journal article
-
- データソース種別
-
- IRDB
- CiNii Articles