Radius evolution of the disk. The radii measured from simulations as described in Sect. 5.1.3 are plotted with solid (R_kep) and dashed (R_mag) lines for R_ℓ14 in blue. The disk initially has a Keplerian radius of about 20 AU for almost 50 kyr and a magnetized envelope that is roughly 1.5 times larger. At later times, the disk grows to nearly 50 AU in radius, and the magnetized region grows even more significantly to more than twice the size of the demagnetized Keplerian disk. Runs R_40ky_ℓ18 and R_80ky_ℓ18 are overplotted (with the same line styles), and the size of the disk is consistent with different resolutions.