Advanced laminated antiferromagnetically coupled recording media with high thermal stability

Pang, S. I.; Piramanayagam, S. N.; Wang, J. P.
January 2002
Applied Physics Letters;1/28/2002, Vol. 80 Issue 4, p616
Academic Journal
A layered structure to improve the antiferromagnetic exchange coupling constant (J) in laminated antiferromagnetically coupled (LAC) media is proposed. This structure has a much larger thermal stability in comparison to simple LAC structures. It also improves the coercivity and decreases the remnant moment-thickness product to achieve a high resolution and a low pulse width. The recording measurements indicate that this structure has a slightly larger noise than the simple LAC structures. However, its overall signal-to-noise ratio (SNR) is comparable to that of the simple LAC structures. High SNR and much higher thermal stability make this structure suitable for ultrahigh areal densities. © 2002 American Institute of Physics.


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