As Hs (stray field)= -Hd (demagnetizing field), What will happen if we minimize the stray field? Does minimize stray field will also reduce the strength of demagnetizing field? If yes then how will we minimize stray field so that it does not affect the demagnetizing field? here few lines about the stray field and demagnetizing field is taken from J. St¨ohr H.C. Siegmann Magnetism From Fundamentals to Nanoscale Dynamics To understand the nature of the three magnetic vectors B, H, and M. We use the example of a flat ferromagnetic disk that has been perpendicularly magnetized, by an external magnetic field. After this process, the external magnetic field has been turned off, so that we consider only the field generated by the ferromagnetic disk itself In the absence of an external magnetic field, a flat disk magnetized perpendicular to the surface is characterized by the three magnetic vectors B, H, and M, The magnetic field inside the magnetic material is called the demagnetizing field Hd because it is oriented opposite to the magnetization M, thus tending to destroy it. The field outside the material is called the stray field Hs and it loops around in space.