Effects of Inter-layer Magnetic Interactions in Multilayered CoCrTa/Cr Thin Film Media

Tai Min; Jian Gang Zhu; Jack H. Judy

doi:10.1109/20.278739

Effects of Inter-layer Magnetic Interactions in Multilayered CoCrTa/Cr Thin Film Media

Tai Min
, Jian Gang Zhu
, Jack H. Judy

University of Minnesota Twin Cities

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

15 Scopus citations

Abstract

The magnetic properties and media noise of double-magnetic-layer longitudinal CoCrTa/Cr thin film media were investigated as a function of the Cr separation layer thickness. It is found that the media noise power decreases rapidly for initial increase of Cr separation layer thickness (10Å~25Å) and gradually increases for further increase of Cr spacer thickness(25Å~300Å). The highest signal-to-noise ratio (SNR) improvement obtained was 5.5dB for a double magnetic layer film with 25A Cr separation rather than the expected 3dB for the film with thicker Cr separation. The remanent magnetization δM-curves vs. applied field are utilized to study the magnetic interactions between the two magnetic layers. The results indicate that 25A Cr separation layer is adequate to decouple the two magnetic layers from exchange coupling, and the magnetostatic interactions between two magnetic layers can alter the effects of the magnetic interactions inside the magnetic layers so as to further reducing the media noise.

Original language	English
Pages (from-to)	5058-5060
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	27
Issue number	6
DOIs	https://doi.org/10.1109/20.278739
State	Published - Nov 1991
Externally published	Yes

Access to Document

10.1109/20.278739

Cite this

@article{b513418f875b4b2da7a68c10e43be9fd,

title = "Effects of Inter-layer Magnetic Interactions in Multilayered CoCrTa/Cr Thin Film Media",

abstract = "The magnetic properties and media noise of double-magnetic-layer longitudinal CoCrTa/Cr thin film media were investigated as a function of the Cr separation layer thickness. It is found that the media noise power decreases rapidly for initial increase of Cr separation layer thickness (10{\AA}\textasciitilde{}25{\AA}) and gradually increases for further increase of Cr spacer thickness(25{\AA}\textasciitilde{}300{\AA}). The highest signal-to-noise ratio (SNR) improvement obtained was 5.5dB for a double magnetic layer film with 25A Cr separation rather than the expected 3dB for the film with thicker Cr separation. The remanent magnetization δM-curves vs. applied field are utilized to study the magnetic interactions between the two magnetic layers. The results indicate that 25A Cr separation layer is adequate to decouple the two magnetic layers from exchange coupling, and the magnetostatic interactions between two magnetic layers can alter the effects of the magnetic interactions inside the magnetic layers so as to further reducing the media noise.",

author = "Tai Min and Zhu, \{Jian Gang\} and Judy, \{Jack H.\}",

year = "1991",

month = nov,

doi = "10.1109/20.278739",

language = "英语",

volume = "27",

pages = "5058--5060",

journal = "IEEE Transactions on Magnetics",

issn = "0018-9464",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "6",

}

TY - JOUR

T1 - Effects of Inter-layer Magnetic Interactions in Multilayered CoCrTa/Cr Thin Film Media

AU - Min, Tai

AU - Zhu, Jian Gang

AU - Judy, Jack H.

PY - 1991/11

Y1 - 1991/11

N2 - The magnetic properties and media noise of double-magnetic-layer longitudinal CoCrTa/Cr thin film media were investigated as a function of the Cr separation layer thickness. It is found that the media noise power decreases rapidly for initial increase of Cr separation layer thickness (10Å~25Å) and gradually increases for further increase of Cr spacer thickness(25Å~300Å). The highest signal-to-noise ratio (SNR) improvement obtained was 5.5dB for a double magnetic layer film with 25A Cr separation rather than the expected 3dB for the film with thicker Cr separation. The remanent magnetization δM-curves vs. applied field are utilized to study the magnetic interactions between the two magnetic layers. The results indicate that 25A Cr separation layer is adequate to decouple the two magnetic layers from exchange coupling, and the magnetostatic interactions between two magnetic layers can alter the effects of the magnetic interactions inside the magnetic layers so as to further reducing the media noise.

AB - The magnetic properties and media noise of double-magnetic-layer longitudinal CoCrTa/Cr thin film media were investigated as a function of the Cr separation layer thickness. It is found that the media noise power decreases rapidly for initial increase of Cr separation layer thickness (10Å~25Å) and gradually increases for further increase of Cr spacer thickness(25Å~300Å). The highest signal-to-noise ratio (SNR) improvement obtained was 5.5dB for a double magnetic layer film with 25A Cr separation rather than the expected 3dB for the film with thicker Cr separation. The remanent magnetization δM-curves vs. applied field are utilized to study the magnetic interactions between the two magnetic layers. The results indicate that 25A Cr separation layer is adequate to decouple the two magnetic layers from exchange coupling, and the magnetostatic interactions between two magnetic layers can alter the effects of the magnetic interactions inside the magnetic layers so as to further reducing the media noise.

UR - https://www.scopus.com/pages/publications/0026260294

U2 - 10.1109/20.278739

DO - 10.1109/20.278739

M3 - 文章

AN - SCOPUS:0026260294

SN - 0018-9464

VL - 27

SP - 5058

EP - 5060

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 6

ER -

Effects of Inter-layer Magnetic Interactions in Multilayered CoCrTa/Cr Thin Film Media

Abstract

Access to Document

Other files and links

Fingerprint

Cite this