Thermal annealing enhancement of Josephson critical currents in ferromagnetic CoFeB.
作者： Nadia Stelmashenko , Mark G. Blamire , Jason W. A. Robinson , Sachio Komori , Graham Kimbell
DOI:
关键词: Coercivity 、 Magnetocrystalline anisotropy 、 Condensed matter physics 、 Spintronics 、 Ferromagnetism 、 Critical current 、 Materials science 、 Spin polarization 、 Alloy 、 Superconductivity
摘要: The electrical and structural properties of Co40Fe40B20 (CoFeB) alloy are tunable with thermal annealing. This is key in the optimization CoFeB-based spintronic devices, where advantageously low magnetic coercivity, high spin polarization, controllable magnetocrystalline anisotropy utilised. So far, there has been no report on superconducting devices based CoFeB. Here, we Nb/CoFeB/Nb Josephson demonstrate an enhancement critical current by up to 700% following annealing due increased ordering results that CoFeB a promising material for development devices.
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