Nanosecond Random Telegraph Noise in In-Plane Magnetic Tunnel Junctions

被引：87

作者：

Hayakawa, K. ^{[1
]}

Kanai, S. ^{[1
,2
,3
,4
]}

Funatsu, T. ^{[1
]}

Igarashi, J. ^{[1
]}

Jinnai, B. ^{[5
]}

Borders, W. A. ^{[1
]}

Ohno, H. ^{[1
,3
,4
,5
,6
]}

Fukami, S. ^{[1
,3
,4
,5
,6
]}

机构：

[1] Tohoku Univ, Res Inst Elect Colmnunicat, Lab Nanoelect & Spintron, Sendai, Miyagi 9808577, Japan

[2] Tohoku Univ, Div Estab Frontier Sci, Org Adv Studies, Sendai, Miyagi 9808577, Japan

[3] Tohoku Univ, Ctr Spintron Res Network, Sendai, Miyagi 9808577, Japan

[4] Tohoku Univ, Ctr Sci & Innovat Spintron, Sendai, Miyagi 9808577, Japan

[5] Tohoku Univ, WPI Adv Inst Mat Res, Sendai, Miyagi 9808577, Japan

[6] Tohoku Univ, Ctr Innovat Integrated Elect Syst, Sendai, Miyagi 9800845, Japan

来源：

PHYSICAL REVIEW LETTERS | 2021年 / 126卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.126.117202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the timescale of random telegraph noise (RTN) of nanomagnets in stochastic magnetic tunnel junctions (MTJs). From analytical and numerical calculations based on the Landau-Lifshitz-Gilbert and the Fokker-Planck equations, we reveal mechanisms governing the relaxation time of perpendicular easy-axis MTJs (p-MTJs) and in-plane easy-axis MTJs (i-MTJs), showing that i-MTJs can be made to have faster RTN. Superparamagnetic i-MTJs with small in-plane anisotropy and sizable perpendicular effective anisotropy show relaxation times down to 8 ns at negligible bias current, which is more than 5 orders of magnitude shorter than that of typical stochastic p-MTJs and about 100 times faster than the shortest time of i-MTJs reported so far. The findings give a new insight and foundation in developing stochastic MTJs for high-performance probabilistic computers.

引用

页数：6

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