Title :
A mixed behavior of training effect and time relaxation in exchange biased systems
Author :
Dho, Joonghoe ; Leung, C.W. ; Kim, H.H. ; Blamire, M.G.
Author_Institution :
Dept. of Mater. Sci. & Metall., Cambridge Univ., UK
Abstract :
Two different types of exchange coupled FeMn/NiFe bilayer systems based on polycrystalline and epitaxial antiferromagnetic layer were prepared. The training effect was observed with different FeMn thickness. The thicker the FeMn layer, the weaker the training effect. Results also show that the training effect is inevitably mixed with a time relaxation behavior of the exchange bias field depending on the number of measurements. The observed time relaxation behavior is explained by a time dependent change of AF domain configuration to minimize the total magnetic energy.
Keywords :
antiferromagnetic materials; exchange interactions (electron); ferromagnetic materials; interface magnetism; iron alloys; magnetic relaxation; manganese alloys; nickel alloys; AF domain configuration; FeMn-NiFe; epitaxial antiferromagnetic layer; exchange biased systems; exchange coupled bilayer systems; polycrystalline antiferromagnetic layer; time relaxation; total magnetic energy; training effect; Helium; Magnetic domains; Magnetic field measurement; Magnetic fields; Magnetic hysteresis; Materials science and technology; Pulsed laser deposition; Substrates; Temperature dependence; Time measurement;
Conference_Titel :
Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International
Print_ISBN :
0-7803-9009-1
DOI :
10.1109/INTMAG.2005.1464460
