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https://doi.org/10.1021/acsami.1c01720
Title: | Spin−Orbit Torque Switching of a High-Quality Perpendicularly Magnetized Ferrimagnetic Heusler Mn3Ge Film |
Authors: | Lizhu Ren Liang Liu Xinyu Shu Weinan Lin Ping Yang Jingsheng Chen Kie Leong Teo |
Keywords: | spin−orbit torque, current-induced magnetization switching, ferrimagnet film, high perpendicularly magnetized anisotropy |
Issue Date: | 6-Apr-2021 |
Publisher: | American Chemical Society |
Citation: | Lizhu Ren, Liang Liu, Xinyu Shu, Weinan Lin, Ping Yang, Jingsheng Chen, Kie Leong Teo (2021-04-06). Spin−Orbit Torque Switching of a High-Quality Perpendicularly Magnetized Ferrimagnetic Heusler Mn3Ge Film. ACS Applied Materials and Interfaces 13 (15) : 18294-18300. ScholarBank@NUS Repository. https://doi.org/10.1021/acsami.1c01720 |
Abstract: | Current-induced spin−orbit torque (SOT) switching of magnetization has attracted great interest due to its potential application in magnetic memory devices, which offer low-energy consumption and high-speed writing. However, most of the SOT studies on perpendicularly magnetized anisotropy (PMA) magnets have been limited to heterostructures with interfacial PMA and poor thermal stability. Here, we experimentally demonstrate a SOT magnetization switching for a ferrimagnetic D022-Mn3Ge film with high bulk PMA and robust thermal stability factor under a critical current density of 6.6 × 1011 A m−2 through the spin Hall effect of an adjacent capping Pt and a buffer Cr layer. A large effective damping-like SOT efficiency of 2.37 mT/1010 A m−2 is determined using harmonic measurements in the structure. The effect of the double-spin source layers and the negative-exchange interaction of the ferrimagnet may explain the large SOT efficiency and the manifested magnetization switching of Mn3Ge. Our findings demonstrate that D022-Mn3Ge is a promising candidate for application in high-density SOT magnetic random-access memory devices. |
Source Title: | ACS Applied Materials and Interfaces |
URI: | https://scholarbank.nus.edu.sg/handle/10635/249109 |
ISSN: | 19448244 |
DOI: | 10.1021/acsami.1c01720 |
Appears in Collections: | Elements Staff Publications |
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