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

Research output: Contribution to journal › Article › peer-review

17 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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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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JO - Applied Physics Letters

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ER -

Noise reduction mechanisms in laminated antiferromagnetically coupled recording media

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