Jiaming Mei, Jagadish Kumar Galivarapu, Shangqian Wang, Buyun Huang, K. Kamala Bharathi, Ke Wang
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Voltage controlled magnetic properties and perpendicular magnetic anisotropy of Co2FeSi alloy thin films
A series of Pt/Co2FeSi/MgAl2O4/Pt thin films with Co2FeSi thicknesses ranging from 4.5 to 6 nm are constructed to evaluate the influence of applied voltage on magnetic coercivity. It is found that the change in coercivity is around 50.04% at an applied voltage of 16 V for a 5.5 nm thin film, but increases significantly to 72.24% for a 6 nm thin film. We show evolution of perpendicular magnetic anisotropy (PMA) properties of Co2FeSi amorphous thin films with varying thickness. The polarization of External Hall Effect (EHE) and Magneto-Optic Kerr Effect (MOKE) loops match well with magnetic hysteresis. The EHE coefficient Rs rises from 2.0 × 10–10 to 5.5 × 10–10 Ω cm/G with increase in thickness from 4 nm to 6.5 nm, respectively. The voltage controlled the magnetic properties of Co2FeSi thin films might be beneficial in the development of low-power magnetic tunnel junctions [MTJs].
期刊介绍：
The Journal of Materials Science: Materials in Electronics is an established refereed companion to the Journal of Materials Science. It publishes papers on materials and their applications in modern electronics, covering the ground between fundamental science, such as semiconductor physics, and work concerned specifically with applications. It explores the growth and preparation of new materials, as well as their processing, fabrication, bonding and encapsulation, together with the reliability, failure analysis, quality assurance and characterization related to the whole range of applications in electronics. The Journal presents papers in newly developing fields such as low dimensional structures and devices, optoelectronics including III-V compounds, glasses and linear/non-linear crystal materials and lasers, high Tc superconductors, conducting polymers, thick film materials and new contact technologies, as well as the established electronics device and circuit materials.
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