If your paper is not accepted in Journal of Magnetism and Magnetic Materials the Editor may suggest submitting to another journal. If the Editor suggests Physics Open, and your article is accepted, you will not have to pay an APC (Article Publishing Charge). This offer is valid on papers submitted by the 31st December 2020.
The world is full of invisible electromagnetic waves. Although we can see a small part of the electromagnetic spectrum—the colours that make up visible light—the rest of the spectrum, including radio waves, microwaves, infrared, ultraviolet, X-rays and gamma rays, are invisible to us.