Large Emission Power over 2 μW with High Q Factor Obtained from Nanocontact Magnetic-Tunnel-Junction-Based Spin Torque Oscillator

被引：69

作者：

Maehara, Hiroki ^{[1
,2
,4
]}

Kubota, Hitoshi ^{[2
]}

Suzuki, Yoshishige ^{[3
]}

Seki, Takayuki ^{[2
,4
]}

Nishimura, Kazumasa ^{[1
]}

Nagamine, Yoshinori ^{[1
]}

Tsunekawa, Koji ^{[1
]}

Fukushima, Akio ^{[2
]}

Deac, Alina M. ^{[2
,3
]}

Ando, Koji ^{[2
]}

Yuasa, Shinji ^{[2
,4
]}

机构：

[1] Canon ANELVA Corp, Proc Dev Ctr, Kawasaki, Kanagawa 2158550, Japan

[2] Spintron Res Ctr, Natl Inst Adv Ind Sci & Technol AIST, Tsukuba, Ibaraki 3058568, Japan

[3] Osaka Univ, Grad Sch Engn Sci, Toyonaka, Osaka 5608531, Japan

[4] Univ Tsukuba, Inst Appl Phys, Tsukuba, Ibaraki 3058573, Japan

来源：

APPLIED PHYSICS EXPRESS | 2013年 / 6卷 / 11期

关键词：

ROOM-TEMPERATURE; MICROWAVE EMISSION; NANO-OSCILLATORS; PHASE-LOCKING; MAGNETORESISTANCE; DRIVEN; MULTILAYER; EXCITATION; DEVICES;

D O I：

10.7567/APEX.6.113005

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have developed a new type of nanocontact structure called a "sombrero-shaped'' nano-contact for a spin torque oscillator (STO) based on magnetic tunnel junctions. This structure reduces the shunt current, which passes through the capping layer, and hence improves the magnetoresistance (MR) ratio to 46% compared with an MR ratio of 3% in conventional nano-contact structures. It also displays highly stable oscillation (Q=350) with high emission power over 2 mu W. This is significant in the development of new spintronic devices such as nanosized microwave generators and highly sensitive nanoscale magnetic field sensors. (C) 2013 The Japan Society of Applied Physics

引用

页数：3

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