Noise reduction mechanisms in laminated antiferromagnetically coupled recording media

S. N. Piramanayagam; J. P. Wang; C. H. Hee; S. I. Pang; T. C. Chong; Z. S. Shan; L. Huang

doi:10.1063/1.1407855

Noise reduction mechanisms in laminated antiferromagnetically coupled recording media

S. N. Piramanayagam, J. P. Wang, C. H. Hee, S. I. Pang, T. C. Chong, Z. S. Shan, L. Huang

Electrical and Computer Engineering

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16 Scopus citations

Abstract

Experimental methods to obtain remnant moment-thickness product (M_rδ) reduction in the laminated antiferromagnetically coupled (LAC) recording media is described. The results indicate that the reduction in M_rδ (or, indirectly, a reduction in noise) can be obtained by altering the antiferromagnetic coupling constant J, or by the parameters of the underlayer such as anisotropy constant (K_u2), thickness (t₂), etc. A method to enhance J by intrinsic means is proposed by which a high exchange field of about 1900 Oe can be obtained. Thermal energy has been found to help in obtaining a M_rδ reduction in LAC media. Substrates with lower surface roughness also enhance the M_rδ reduction.

Original language	English (US)
Pages (from-to)	2423-2425
Number of pages	3
Journal	Applied Physics Letters
Volume	79
Issue number	15
DOIs	https://doi.org/10.1063/1.1407855
State	Published - Oct 8 2001

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abstract = "Experimental methods to obtain remnant moment-thickness product (Mrδ) reduction in the laminated antiferromagnetically coupled (LAC) recording media is described. The results indicate that the reduction in Mrδ (or, indirectly, a reduction in noise) can be obtained by altering the antiferromagnetic coupling constant J, or by the parameters of the underlayer such as anisotropy constant (Ku2), thickness (t2), etc. A method to enhance J by intrinsic means is proposed by which a high exchange field of about 1900 Oe can be obtained. Thermal energy has been found to help in obtaining a Mrδ reduction in LAC media. Substrates with lower surface roughness also enhance the Mrδ reduction.",

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T1 - Noise reduction mechanisms in laminated antiferromagnetically coupled recording media

AU - Piramanayagam, S. N.

AU - Wang, J. P.

AU - Hee, C. H.

AU - Pang, S. I.

AU - Chong, T. C.

AU - Shan, Z. S.

AU - Huang, L.

PY - 2001/10/8

Y1 - 2001/10/8

N2 - Experimental methods to obtain remnant moment-thickness product (Mrδ) reduction in the laminated antiferromagnetically coupled (LAC) recording media is described. The results indicate that the reduction in Mrδ (or, indirectly, a reduction in noise) can be obtained by altering the antiferromagnetic coupling constant J, or by the parameters of the underlayer such as anisotropy constant (Ku2), thickness (t2), etc. A method to enhance J by intrinsic means is proposed by which a high exchange field of about 1900 Oe can be obtained. Thermal energy has been found to help in obtaining a Mrδ reduction in LAC media. Substrates with lower surface roughness also enhance the Mrδ reduction.

AB - Experimental methods to obtain remnant moment-thickness product (Mrδ) reduction in the laminated antiferromagnetically coupled (LAC) recording media is described. The results indicate that the reduction in Mrδ (or, indirectly, a reduction in noise) can be obtained by altering the antiferromagnetic coupling constant J, or by the parameters of the underlayer such as anisotropy constant (Ku2), thickness (t2), etc. A method to enhance J by intrinsic means is proposed by which a high exchange field of about 1900 Oe can be obtained. Thermal energy has been found to help in obtaining a Mrδ reduction in LAC media. Substrates with lower surface roughness also enhance the Mrδ reduction.

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Noise reduction mechanisms in laminated antiferromagnetically coupled recording media

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