Interfacial Magnetic Anisotropy Controlled Spin Pumping in Co60Fe20B20/Pt Stack

IF 1.3 4区 物理与天体物理 Q4 PHYSICS, APPLIED
Spin Pub Date : 2024-03-30 DOI:10.1142/s2010324724400010
Mahammad Tahir, Dhananjay Tiwari, Abhishek Juyal, Rohit Medwal, Soumik Mukhopadhyay
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引用次数: 0

Abstract

Controlled spin transport in magnetic stacks is required to realize pure spin current-driven logic and memory devices. The control over the generation and detection of the pure spin current is achieved by tuning the spin to charge conversion efficiency of the heavy metal interfacing with ferromagnets. Here, we demonstrate the direct tunability of spin angular momentum transfer and thereby spin pumping, in CoFeB/Pt stack, with interfacial magnetic anisotropy. The ultra-low thickness of the CoFeB thin film by tilting the magnetization from in-plane to out-of plane direction due to interfacial anisotropy from higher thickness of CoFeB thin film. The ferromagnetic resonance measurements are performed to investigate the magnetic anisotropy and spin pumping in CoFeB/Pt stacks. We clearly observe tunable spin pumping effect in the CoFeB/Pt stacks with varying CoFeB thicknesses. The spin current density, with varying ferromagnetic layer thickness, is found to increase from 1.10MA/m2 to 2.40MA/m2, with increasing in-plane anisotropy field. Such interfacial anisotropy-controlled generation of pure spin current can potentially lead to next-generation anisotropic spin current-controlled spintronic devices.

Co60Fe20B20/Pt 叠层中受界面磁各向异性控制的自旋泵送
要实现纯自旋电流驱动的逻辑和存储设备,就必须控制磁堆中的自旋传输。纯自旋电流的产生和检测控制是通过调整重金属与铁磁体界面的自旋电荷转换效率来实现的。在这里,我们展示了 CoFeB/Pt 叠层中自旋角动量传递的直接可调性,以及自旋泵浦与界面磁各向异性的关系。超低厚度的 CoFeB 薄膜会因界面各向异性而将磁化从平面内倾斜到平面外。为了研究 CoFeB/Pt 叠层中的磁各向异性和自旋泵,我们进行了铁磁共振测量。我们在 CoFeB 厚度不同的 CoFeB/Pt 叠层中清楚地观察到了可调的自旋泵效应。随着面内各向异性场的增加,铁磁层厚度不同的自旋电流密度从 1.10MA/m2 增加到 2.40MA/m2。这种由界面各向异性控制的纯自旋电流的产生有可能导致下一代各向异性自旋电流控制的自旋电子器件。
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来源期刊
Spin
Spin Materials Science-Electronic, Optical and Magnetic Materials
CiteScore
2.10
自引率
11.10%
发文量
34
期刊介绍: Spin electronics encompasses a multidisciplinary research effort involving magnetism, semiconductor electronics, materials science, chemistry and biology. SPIN aims to provide a forum for the presentation of research and review articles of interest to all researchers in the field. The scope of the journal includes (but is not necessarily limited to) the following topics: *Materials: -Metals -Heusler compounds -Complex oxides: antiferromagnetic, ferromagnetic -Dilute magnetic semiconductors -Dilute magnetic oxides -High performance and emerging magnetic materials *Semiconductor electronics *Nanodevices: -Fabrication -Characterization *Spin injection *Spin transport *Spin transfer torque *Spin torque oscillators *Electrical control of magnetic properties *Organic spintronics *Optical phenomena and optoelectronic spin manipulation *Applications and devices: -Novel memories and logic devices -Lab-on-a-chip -Others *Fundamental and interdisciplinary studies: -Spin in low dimensional system -Spin in medical sciences -Spin in other fields -Computational materials discovery
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