Magnetic storage density is held back by how small you can make a bit (magnetic domain) and still be able to write it AND not have it succumb to random flips du

Magnetic storage density is held back by how small you can make a bit (magnetic domain) and still be able to write it AND not have it succumb to random flips due to thermal energy. EAMR works by temporarily making tiny magnetic domains of a hard to flip material easier to flip while under the influence of additional energy.