Improved thermal stability of synthetic ferrimagnetic media with enhanced exchange coupling strength

Inomata, A.; Abarra, E.N.; Acharya, B.R.; Ajan, Antony; Okamoto, Iwao

doi:10.1063/1.1467696

Cited by 12 publications

(2 citation statements)

References 8 publications

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“…These huge differences show that it is an effective method to control the SAF properties via tuning the IEC. By increasing the IEC, which is crucial for a smaller size MTJ [30], we obtain a CoFeB composed SAFs with extremely large saturation field H x .…”

Section: Resultsmentioning

confidence: 99%

Unusual spin–orbit torque switching in perpendicular synthetic antiferromagnets with strong interlayer exchange coupling

Luo¹,

Wang²,

Liu³

et al. 2023

J. Phys.: Condens. Matter

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Synthetic antiferromagnet (SAF) is an outstanding system for controlling magnetic coupling via tuning the layer thickness and material composition. Here, we control the interlayer exchange coupling (IEC) in a perpendicularly magnetized SAF Pt/Co/Ir/CoFeB/MgO multilayer, which is tuned by varying the nonmagnetic layer Ir thickness and the magnetic layer Co thickness. And we study the spin-orbit torque (SOT) driven magnetization switching of the SAF. In the SAF with a weak IEC, the SOT-driven switching behavior is similar to that of a single ferromagnets system, which is dominated by the external magnetic field. In contrast, in the SAF with an ultra-strong IEC, the saturation magnetic field is large than 50 kOe, and the SOT-driven switching behavior is decided by the effective magnetic field. The effective field is correlated to the external magnetic field, the IEC field, magnetic moments of CoFeB and Co, and magnetic anisotropy. These results may advance the understanding of SOT switching of perpendicular SAFs and promote the applications of SAFs with low stray fields and lower power in spintronic devices.

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Section: Resultsmentioning

confidence: 99%

Unusual spin–orbit torque switching in perpendicular synthetic antiferromagnets with strong interlayer exchange coupling

Luo¹,

Wang²,

Liu³

et al. 2023

J. Phys.: Condens. Matter

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“…In this case, a single recording media satisfying the above threshold against thermal agitation was easily attainable, however, the magnitude of H c drastically increased [6]. In order to overcome such a physical limitation, synthetic ferrimagnetic media (SFM) [7,8] and anti-ferromagnetically coupled media (AFC) [9], through the indirect RKKY interaction between two adjacent ferromagnetic (FM) recording layers, were introduced and are now still being utilized as the final stage of longitudinal recording media.…”

Section: Introductionmentioning

confidence: 97%

Tailor-made nano-structured materials for perpendicular recording media and head—precise control of direct/indirect exchange coupling

Takahashi¹,

Tsunoda²,

Saito³

2009

Journal of Magnetism and Magnetic Materials

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Implementation of Logic Function and Memristive Behavior in Synthetic Antiferromagnet with Strong Immunity to Perpendicular Magnetic Field Interference

Zhang,

Luo

et al. 2024

Physica Rapid Research Ltrs

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Spintronic devices with heavy metal/ferromagnet structures have shown potential applications for in‐memory computing. However, the sensitivity of ferromagnet to external magnetic field raises a challenge for the practical applications of these devices. The usage of synthetic antiferromagnet (SAF) can effectively address this issue due to its good magnetic field immunity. This work demonstrates the implementation of all 16 types of Boolean logic functions via controlling the magnetization states of the SAF layer by using current pulses, and also the stable multistate storage under the interference of perpendicular magnetic field in these devices. The SAF devices also exhibit synaptic plasticity under the stimulation of current pulses. The artificial neural network constructed based on the SAF device can perform handwritten digit recognition tasks with an accuracy rate of 90%. These results showcase the viability and superiority of the SAF device in building logic‐in‐memory architecture for its strong immunity to magnetic field interference.

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Improved thermal stability of synthetic ferrimagnetic media with enhanced exchange coupling strength

Cited by 12 publications

References 8 publications

Unusual spin–orbit torque switching in perpendicular synthetic antiferromagnets with strong interlayer exchange coupling

Unusual spin–orbit torque switching in perpendicular synthetic antiferromagnets with strong interlayer exchange coupling

Tailor-made nano-structured materials for perpendicular recording media and head—precise control of direct/indirect exchange coupling

Implementation of Logic Function and Memristive Behavior in Synthetic Antiferromagnet with Strong Immunity to Perpendicular Magnetic Field Interference

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