一种新的MAMR双FGL STO

IF 2.1 3区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Magnetics Pub Date : 2024-12-05 DOI:10.1109/TMAG.2024.3511629

Yasushi Kanai;Keita Tatsuno;Simon J. Greaves

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引用次数: 0

摘要

本文讨论了用于微波辅助磁记录（MAMR）的双场发生层（FGL - STO）自旋力矩振荡器（STO）的微磁分析。由于两个FGL之间的反铁磁耦合，双FGL sto在稳定振荡方面具有优越的特性，特别是当集成到写入头间隙时。然而，它的结构和材料可能很复杂。我们的新型双FGL STO结构简单，由FGL/软磁材料(SMM)/FGL组成。此外，由于振荡频率随注入STO的电流密度而变化，因此适用于双层记录。记录仿真表明，与没有SMM层的双FGL STO相比，STO具有较高的信噪比(SNR)/航迹宽度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A New Dual FGL STO for MAMR

This article discusses a micromagnetic analysis of spin-torque oscillators (STOs) with two field generation layers (FGLs) (dual FGL STO) for use in microwave-assisted magnetic recording (MAMR). Dual FGL STOs have superior characteristics with regard to stable oscillation, especially when integrated into the write head gap, due to antiferromagnetic coupling between the two FGLs. The structure and materials, however, can be complicated. Our new dual FGL STO has a simpler structure, composed of FGL/soft magnetic material (SMM)/FGL. In addition, because the oscillation frequency changes with the current density injected into the STO, it is suitable for dual-layer recording. Recording simulations showed that the STO had a high signal-to-noise ratio (SNR)/track width, compared with a dual FGL STO without the SMM layer.

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来源期刊

IEEE Transactions on Magnetics 工程技术-工程：电子与电气

CiteScore

4.00

自引率

14.30%

发文量

565

审稿时长

4.1 months

期刊介绍： Science and technology related to the basic physics and engineering of magnetism, magnetic materials, applied magnetics, magnetic devices, and magnetic data storage. The IEEE Transactions on Magnetics publishes scholarly articles of archival value as well as tutorial expositions and critical reviews of classical subjects and topics of current interest.