Magnetization reversal of antiferromagnetically coupled (Co/Ni) and (Co/Pt) multilayers

Subhi, A. Al; Sbiaa, R.; Ranjbar, Mahdy; Åkerman, Johan

doi:10.1016/j.jmmm.2019.02.022

Cited by 10 publications

(2 citation statements)

References 32 publications

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“…Furthermore, in a multilayer structure with ferromagnetic layers and nonmagnetic layers, it has been reported that antiferromagnetic coupling behavior can be observed in the magnetization process [31]. However, in this study, such characteristic coupling behavior was not observed in the electrodeposited Co/Cu multilayered nanowires array.…”

Section: Magnetoresistance Properties Of Co/cu Multilayered Nanowirescontrasting

confidence: 65%

CPP-GMR Performance of Electrochemically Synthesized Co/Cu Multilayered Nanowire Arrays with Extremely Large Aspect Ratio

2019

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Anodized aluminum oxide (AAO) films, which have numerous nanochannels ca. 75 nm in diameter, D and ca. 70 µm in length, L (ca. 933 in aspect ratio, L/D), were used as a template material for growing Co/Cu multilayered nanowire arrays. The multilayered nanowires with alternating Cu layer and Co layers were synthesized by using an electrochemical pulsed-potential deposition technique. The thickness of the Cu layer was adjusted from ca. 2 to 4 nm while that of the Co layer was regulated from ca. 13 to 51 nm by controlling the pulsed potential parameters. To get a Co/Cu multilayered nanowire in an electrochemical in-situ contact with a sputter-deposited Au thin layer, the pulsed potential deposition was continued up to ca. 5000 cycles until the nanowire reached out toward the surface of AAO template. Current-perpendicular-to-plane giant magnetoresistance (CPP-GMR) effect reached up to ca. 23.5% at room temperature in Co/Cu multilayered nanowires with ca. 3500 Co/Cu bilayers (Cu: 1.4 nm and Co: 18.8 nm). When decreasing the thickness of Co layer, the CPP-GMR value increased due to the Valet–Fert model in the long spin diffusion limit.

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Section: Magnetoresistance Properties Of Co/cu Multilayered Nanowirescontrasting

confidence: 65%

CPP-GMR Performance of Electrochemically Synthesized Co/Cu Multilayered Nanowire Arrays with Extremely Large Aspect Ratio

2019

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“…Such films have always been of great interest in vertical magneto-optic recording media [ 1 , 7 , 8 , 9 ], perpendicular magnetic tunnel junction [ 10 , 11 , 12 ], and spin-valve [ 13 , 14 ] devices. Significant PMA has been observed in periodically altered ferromagnetic (FM) and noble metal multilayers such as Co/Pt, CoNi/Pt, Co/Pd, and Co/Au [ 12 , 15 , 16 , 17 , 18 , 19 , 20 ]. In these multilayer systems, strong PMA is caused by an increase in the orbital moment of Co because of hybridization between the transition metal and the orbitals of heavy metals at the interface.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Anisotropies and Exchange Bias of Co/CoO Multilayers with Intermediate Ultrathin Pt Layers

et al. 2023

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Co/CoO multilayers are fabricated by means of radio-frequency magnetron sputtering. For the formation of each multilayer period, a Co layer is initially produced followed by natural oxidation. Platinum is used not only as buffer and capping layers, but also in the form of intermediate ultrathin layers to enhance perpendicular magnetic anisotropy. Three samples are compared with respect to the magnetic anisotropies and exchange bias between 4–300 K based on superconducting quantum interference device magnetometry measurements. Two of the multilayers are identical Co/CoO/Pt ones; one of them, however, is grown on a Co/Pt “magnetic substrate” to induce perpendicular magnetic anisotropy via exchange coupling through an ultrathin Pt intermediate layer. The third multilayer is of the form Co/CoO/Co/Pt. The use of a “magnetic substrate” results in the observation of loops with large remanence when the field applies perpendicular to the film plane. The CoO/Co interfaces lead to a significant exchange bias at low temperatures after field cooling. The largest exchange bias was observed in the film with double Co/CoO/Co interfaces. Consequently, significant perpendicular anisotropy coexists with large exchange bias, especially at low temperatures. Such samples can be potentially useful for applications related to spintronics and magnetic storage.

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Investigation of soft magnetic properties of Ni/Cu multilayer films: Definitive screening design and response surface methodology

Köçkar

Kaplan

2021

J Mater Sci: Mater Electron

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Magnetization reversal of antiferromagnetically coupled (Co/Ni) and (Co/Pt) multilayers

Cited by 10 publications

References 32 publications

CPP-GMR Performance of Electrochemically Synthesized Co/Cu Multilayered Nanowire Arrays with Extremely Large Aspect Ratio

CPP-GMR Performance of Electrochemically Synthesized Co/Cu Multilayered Nanowire Arrays with Extremely Large Aspect Ratio

Magnetic Anisotropies and Exchange Bias of Co/CoO Multilayers with Intermediate Ultrathin Pt Layers

Investigation of soft magnetic properties of Ni/Cu multilayer films: Definitive screening design and response surface methodology

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