Magnetic sail

A hypothetical magnetic sail or magsail is a proposed method of spacecraft propulsion.

Main possibility is mini-magnetospheric plasma propulsion (M2P2), Not to be confused with electric sail or photon sail.

Mini-Magnetospheric Plasma Propulsion (M2P2) is an advanced plasma propulsion system that will enable spacecraft to attain unprecedented speeds, with minimal energy and mass requirements. It will create a large scale magnetic bubble around the spacecraft to ride the solar winds, and accelerate the spacecraft to unprecedented speeds. mini-magnetosphere is generated by the injection of plasma into the magnetic field supported by solenoid coils on the spacecraft.