DocumentCode :
1451146
Title :
Exchange Bias in 
(111)-Oriented FePt-Based Pseudo Spin Valves
Author :
Zha, C.L. ; Nogués, J. ; Åkerman, Johan
Author_Institution :
Dept. of Microelectron. & Appl. Phys., R. Inst. of Technol., Kista, Sweden
Volume :
45
Issue :
10
fYear :
2009
Firstpage :
3881
Lastpage :
3884
Abstract :
The coupling between hard FePt and soft NiFe layers through a Cu interlayer has been studied in L10 (111) FePt(20)/CoFe(1.5)/Cu(3.5 or 4.5)/CoFe(2)/NiFe(3) (in nanometers) pseudo spin valves. The soft-layer hysteresis loops exhibit clear shifts in the field axis (exchange-bias-like) and a marked coercivity enhancement. It is found that several parameters such as the thickness of the Cu layer or the interface roughness influence the exchange bias properties of the systems, while others (e.g., temperature) are less important. This interlayer coupling arises from the competition between dipolar and Ruderman-Kittel-Kasuya-Yoshida (RKKY) interactions between the layers.
Keywords :
RKKY interaction; buffer layers; cobalt alloys; coercive force; copper; ferromagnetic materials; interface magnetism; interface roughness; iron alloys; magnetic hysteresis; magnetic thin films; metallic thin films; nickel alloys; permanent magnets; platinum alloys; soft magnetic materials; spin valves; sputter deposition; FePt-CoFe-Cu-CoFe-NiFe; Rudermann-Kittel-Kasuya-Yosida interactions; buffer layers; coercivity enhancement; dipolar interactions; exchange bias property; interface roughness; interlayer coupling; magnetron sputtering system; metallic ferromagnetic hard layers; pseudospin valves; soft magnetic layers; soft-layer hysteresis loops; $L1_0$
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2009.2024122
Filename :
5257301
Link To Document :
