离轴外部磁场扰动对垂直 STT-RAM 单元写入误差斜率的影响:微磁研究

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Susheel K. Arya;Sonalie Ahirwar;Tanmoy Pramanik
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引用次数: 0

摘要

外部磁场扰动仍然是自旋转移力矩磁随机存取存储器的一个关键可靠性问题。虽然已经展示了几个原型,但关于不同方向的外部磁场的影响还没有很好的报道。我们基于宏旋的研究表明,在小的离轴外场存在时,写入失败率会显著增加。然而,不连贯的开关路径也会影响开关过程,但宏旋模型却无法捕捉到这些影响。在此,我们报告了垂直纳米磁体在不同大小和方向的磁场下开关过程的微磁模型研究。对于较小尺寸的磁体,研究结果与宏旋模型的预测一致。对于较大尺寸的磁体,当不连贯磁化模式主导开关过程时,离轴外部磁场的影响会变得更加严重。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Impact of Off-Axis External Magnetic Field Perturbation on the Write Error Slopes of Perpendicular STT-RAM Cell: Micromagnetic Study
External magnetic field perturbation remains a key reliability issue for spin-transfer-torque magnetic random-access memory. Although several prototypes have been demonstrated already, the effects of external fields with varying directions are not well reported. Our macrospin-based study revealed a significant increase in write failures in the presence of small off-axis external magnetic fields. However, incoherent switching pathways, which are also known to impact the switching process, cannot be captured by a macrospin model. Here, we report the micromagnetic model study of the switching process of perpendicular nanomagnets in the presence of magnetic fields of varying magnitudes and directions. The results are consistent with the macrospin model prediction for smaller magnet sizes. For larger magnet sizes, the impact of the off-axis external magnetic field becomes much worse when incoherent magnetization modes dominate the switching process.
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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