Nanosecond Random Telegraph Noise in In-Plane Magnetic Tunnel Junctions

Autor:	William A. Borders, Shun Kanai, T. Funatsu, Keisuke Hayakawa, Junta Igarashi, Butsurin Jinnai, Shunsuke Fukami, Hideo Ohno
Rok vydání:	2021
Předmět:	Physics Condensed matter physics Relaxation (NMR) General Physics and Astronomy Biasing Nanosecond 01 natural sciences Nanomagnet Noise (electronics) Orders of magnitude (time) 0103 physical sciences 010306 general physics Anisotropy Superparamagnetism
Zdroj:	Physical Review Letters. 126
ISSN:	1079-7114 0031-9007
DOI:	10.1103/physrevlett.126.117202
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::12c575d43016c671ca3d4ffc3e43878a https://doi.org/10.1103/physrevlett.126.117202 Zobrazit plný text záznamu