Magnetic fields of 18 T or lower intensity are not enough to affect microbial growth in this microorganism. However, fields of higher intensity should be explored to determine the feasibility of using magnetic fields for microbial inactivation, and consequently as an alternative to conventional thermal treatments.
All of the studies you posted are using the unit Tesla to describe the field strengh. This means They were using AC pulsing if I'm not mistaken . Becks device is a pulsed D.C. devise that uses the unit gause.
All they are saying is anything less than 18 T did not work. They also say higher intensity fields should be explored. Yet they failed to explore? And they failed to state the frequencies used?