Ionic current magnetic fields in 3D finite-length nanopores and nanoslits Seyed Ali Tabatabaei, Abraham Mansouri, Ali Tarokh and Seyed Farshid Chini Eur. Phys. J. Plus, 137 3 (2022) 312 Published online: 07 March 2022 DOI: 10.1140/epjp/s13360-022-02519-8