Very large GMR of spin valve with specularly reflective layers

Jongill Hong, Hitoshi Kanai, Yuji Uehara

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Our specular spin valves fabricated by a novel technique have provided excellent head performance suitable for an ultra-high recording density. We previously used a spin valve with an oxide capping layer (a so-called single specular spin valve) for the demonstration of 56.1 Gb/in2. The single specular spin valve was magnetically soft and its GMR value reached over 12%. However, the specularity was still low at the interface between the pinned layer and the Cu spacer. Embedding another oxide layer into the pinned layer (creating a so-called double specular spin valve), we enhanced the specularity and this led to a GMR value of over 15%. As a matter of fact, we increased the output of the read head with this double specular spin valve by more than 50% over that of the read head used in the demonstration. Therefore, we demonstrated that the head with the double specular spin valve can be used for an areal density of 106.4 Gb/in2 in magnetic recording, with the help of advanced media and integration techniques.

Original languageEnglish
Title of host publicationINTERMAG Europe 2002 - IEEE International Magnetics Conference
EditorsJ. Fidler, B. Hillebrands, C. Ross, D. Weller, L. Folks, E. Hill, M. Vazquez Villalabeitia, J. A. Bain, Jo De Boeck, R. Wood
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)0780373650, 9780780373655
DOIs
Publication statusPublished - 2002 Jan 1
Event2002 IEEE International Magnetics Conference, INTERMAG Europe 2002 - Amsterdam, Netherlands
Duration: 2002 Apr 282002 May 2

Other

Other2002 IEEE International Magnetics Conference, INTERMAG Europe 2002
CountryNetherlands
CityAmsterdam
Period02/4/2802/5/2

Fingerprint

Oxides
Demonstrations
Magnetic recording

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering
  • Surfaces, Coatings and Films

Cite this

Hong, J., Kanai, H., & Uehara, Y. (2002). Very large GMR of spin valve with specularly reflective layers. In J. Fidler, B. Hillebrands, C. Ross, D. Weller, L. Folks, E. Hill, M. Vazquez Villalabeitia, J. A. Bain, J. De Boeck, ... R. Wood (Eds.), INTERMAG Europe 2002 - IEEE International Magnetics Conference [1000945] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/INTMAG.2002.1000945
Hong, Jongill ; Kanai, Hitoshi ; Uehara, Yuji. / Very large GMR of spin valve with specularly reflective layers. INTERMAG Europe 2002 - IEEE International Magnetics Conference. editor / J. Fidler ; B. Hillebrands ; C. Ross ; D. Weller ; L. Folks ; E. Hill ; M. Vazquez Villalabeitia ; J. A. Bain ; Jo De Boeck ; R. Wood. Institute of Electrical and Electronics Engineers Inc., 2002.
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abstract = "Our specular spin valves fabricated by a novel technique have provided excellent head performance suitable for an ultra-high recording density. We previously used a spin valve with an oxide capping layer (a so-called single specular spin valve) for the demonstration of 56.1 Gb/in2. The single specular spin valve was magnetically soft and its GMR value reached over 12{\%}. However, the specularity was still low at the interface between the pinned layer and the Cu spacer. Embedding another oxide layer into the pinned layer (creating a so-called double specular spin valve), we enhanced the specularity and this led to a GMR value of over 15{\%}. As a matter of fact, we increased the output of the read head with this double specular spin valve by more than 50{\%} over that of the read head used in the demonstration. Therefore, we demonstrated that the head with the double specular spin valve can be used for an areal density of 106.4 Gb/in2 in magnetic recording, with the help of advanced media and integration techniques.",
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Hong, J, Kanai, H & Uehara, Y 2002, Very large GMR of spin valve with specularly reflective layers. in J Fidler, B Hillebrands, C Ross, D Weller, L Folks, E Hill, M Vazquez Villalabeitia, JA Bain, J De Boeck & R Wood (eds), INTERMAG Europe 2002 - IEEE International Magnetics Conference., 1000945, Institute of Electrical and Electronics Engineers Inc., 2002 IEEE International Magnetics Conference, INTERMAG Europe 2002, Amsterdam, Netherlands, 02/4/28. https://doi.org/10.1109/INTMAG.2002.1000945

Very large GMR of spin valve with specularly reflective layers. / Hong, Jongill; Kanai, Hitoshi; Uehara, Yuji.

INTERMAG Europe 2002 - IEEE International Magnetics Conference. ed. / J. Fidler; B. Hillebrands; C. Ross; D. Weller; L. Folks; E. Hill; M. Vazquez Villalabeitia; J. A. Bain; Jo De Boeck; R. Wood. Institute of Electrical and Electronics Engineers Inc., 2002. 1000945.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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N2 - Our specular spin valves fabricated by a novel technique have provided excellent head performance suitable for an ultra-high recording density. We previously used a spin valve with an oxide capping layer (a so-called single specular spin valve) for the demonstration of 56.1 Gb/in2. The single specular spin valve was magnetically soft and its GMR value reached over 12%. However, the specularity was still low at the interface between the pinned layer and the Cu spacer. Embedding another oxide layer into the pinned layer (creating a so-called double specular spin valve), we enhanced the specularity and this led to a GMR value of over 15%. As a matter of fact, we increased the output of the read head with this double specular spin valve by more than 50% over that of the read head used in the demonstration. Therefore, we demonstrated that the head with the double specular spin valve can be used for an areal density of 106.4 Gb/in2 in magnetic recording, with the help of advanced media and integration techniques.

AB - Our specular spin valves fabricated by a novel technique have provided excellent head performance suitable for an ultra-high recording density. We previously used a spin valve with an oxide capping layer (a so-called single specular spin valve) for the demonstration of 56.1 Gb/in2. The single specular spin valve was magnetically soft and its GMR value reached over 12%. However, the specularity was still low at the interface between the pinned layer and the Cu spacer. Embedding another oxide layer into the pinned layer (creating a so-called double specular spin valve), we enhanced the specularity and this led to a GMR value of over 15%. As a matter of fact, we increased the output of the read head with this double specular spin valve by more than 50% over that of the read head used in the demonstration. Therefore, we demonstrated that the head with the double specular spin valve can be used for an areal density of 106.4 Gb/in2 in magnetic recording, with the help of advanced media and integration techniques.

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ER -

Hong J, Kanai H, Uehara Y. Very large GMR of spin valve with specularly reflective layers. In Fidler J, Hillebrands B, Ross C, Weller D, Folks L, Hill E, Vazquez Villalabeitia M, Bain JA, De Boeck J, Wood R, editors, INTERMAG Europe 2002 - IEEE International Magnetics Conference. Institute of Electrical and Electronics Engineers Inc. 2002. 1000945 https://doi.org/10.1109/INTMAG.2002.1000945