2021/04/07 by Melissa Loving, Loving, Melissa G., T. Ambrose +13
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Iron-based superconductors research #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Superconductivity (cond-mat.supr-con)
paper · pdf · doi:10.48550/arxiv.2104.03188
openalex publication_date 2021/04/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this work, we show fundamental low temperature (T) magnetic and Ic\nresponses of a magnetic Josephson Junction (MJJ) S/F/S heterostructure - Nb/\nCo56Fe24B20 /Nb. The ultra-thin Co56Fe24B20 (CFB) films (0.6-1.3 nm) were\ndeposited onto two separate buffer layers: 150 nm Nb/5 nm Cu and 150 nm Nb/ (1\nnm Cu/0.5 nm Nb)6/1 nm Cu. Both film sets were capped with 5 nm Cu/50 nm Nb.\nMagnetic results show reduced switching distributions in patterned arrays\nmeasured at near liquid Helium temperature (~ 10 K), with the incorporation of\nthe (1 nm Cu/0.5 nm Nb)6/1 nm multilayer. In electrical devices, the critical\ncurrent (Ic) through the CFB layer decays exponentially with increasing\nferromagnetic layer thickness and shows a dip in Ic at 0.8 nm, characteristic\nof a change in the equilibrium Josephson phase in an S/F/S structure.\n