Does the Quantegy studio cassette have more coeecivity and retentivity than 499 or 456?

Reading the Quantegy professional media products catalog:


                                               Coercivity              Retentivity


472     Type II cassette              675Oe                    1700Gs

456                                            330Oe                    1460Gs

499                                            350Oe                    1500Gs

AVX/IRC IEC type I cassette   360Oe                    1400Gs


Is this done because a cassette tape has much less width? Is it a bit larger that half of 1/4in?


The 472 is a high bias cassette.


What is Oe?
Oe comes form Orsted. It can also be measured in kA/m
He discovered that moving electric charges ie electric current creates a magnetic field.
https://en.m.wikipedia.org/wiki/Hans_Christian_Ørsted


What is Gs?
Gs comes from the physicist Gaus. It can also be measured in mT.


What is coercivity?
Coeecivity or coercive force is the magnetising force necessary to reduce the flux density in a
magnetic material to zero. See hysteresis. From mini dictionary of Physics - Oxford.


What is retentivity?


See also:
https://en.m.wikipedia.org/wiki/Magnetic_hysteresis
and the Wikipedia link on damping low earth satelite orbits.


Degaussing
https://en.m.wikipedia.org/wiki/Degaussing


Further reading:


Feynman lecture in Physics - Feynman, Leighton, Sands


Electricity and Magnetism - Purcell - Berkley Physics Course


Conceptual Physics - Hewitt