| Paper Abstract and Keywords |
| Presentation |
2015-06-04 14:15
Dual free-layer spin-torque oscillator for read head application in magnetic recording
Tazumi Nagasawa, Kiwamu Kudo, Hirofumi Suto, Michinaga Yamagishi, Koichi Mizushima, Rie Sato (Toshiba RDC) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
Read heads for HDDs with areal density over 2 Tb/in2 are predicted to suffer from magnetic noises that seriously reduce the signal-to-noise (S/N) ratio. To overcome this problem, a novel read head composed of a spin-torque oscillator (STO) has recently been proposed. For the implementation of an STO read head, large-amplitude microwave emissions with narrow spectral linewidth are required. In this article, we experimentally study the oscillation properties of an STO with a dual free layer and its response to a pulsed magnetic field. This type of STO shows large-amplitude oscillations with narrow linewidth because of synchronized magnetization motions in the two free layers. In addition, this STO has a thinner structure than the conventional one. This feature is preferable for an STO read head, in which the STO needs to be placed inside a narrow shield-to-shield gap to obtain high spatial resolution. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
Spin-Torque Oscillator / STO / Magnetic Recording / Read Head / Dual Free Layer / / / |
| Reference Info. |
ITE Tech. Rep. |
| Paper # |
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| Date of Issue |
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| Download PDF |
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| Conference Information |
| Committee |
IEICE-MRIS MMS |
| Conference Date |
2015-06-04 - 2015-06-05 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
Tohoku Univ. |
| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
Recording Systems, etc. |
| Paper Information |
| Registration To |
IEICE-MRIS |
| Conference Code |
2015-06-MR-MMS |
| Language |
Japanese |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
Dual free-layer spin-torque oscillator for read head application in magnetic recording |
| Sub Title (in English) |
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| Keyword(1) |
Spin-Torque Oscillator |
| Keyword(2) |
STO |
| Keyword(3) |
Magnetic Recording |
| Keyword(4) |
Read Head |
| Keyword(5) |
Dual Free Layer |
| Keyword(6) |
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| Keyword(7) |
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| Keyword(8) |
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| 1st Author's Name |
Tazumi Nagasawa |
| 1st Author's Affiliation |
Toshiba R&D Center (Toshiba RDC) |
| 2nd Author's Name |
Kiwamu Kudo |
| 2nd Author's Affiliation |
Toshiba R&D Center (Toshiba RDC) |
| 3rd Author's Name |
Hirofumi Suto |
| 3rd Author's Affiliation |
Toshiba R&D Center (Toshiba RDC) |
| 4th Author's Name |
Michinaga Yamagishi |
| 4th Author's Affiliation |
Toshiba R&D Center (Toshiba RDC) |
| 5th Author's Name |
Koichi Mizushima |
| 5th Author's Affiliation |
Toshiba R&D Center (Toshiba RDC) |
| 6th Author's Name |
Rie Sato |
| 6th Author's Affiliation |
Toshiba R&D Center (Toshiba RDC) |
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| Speaker |
Author-1 |
| Date Time |
2015-06-04 14:15:00 |
| Presentation Time |
25 minutes |
| Registration for |
IEICE-MRIS |
| Paper # |
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| Volume (vol) |
vol.39 |
| Number (no) |
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