Superparamagnetism (SPM) is a type of magnetism that occurs in small

ferromagnetic or ferrimagnetic nanoparticles

Evert Willem Gorter has written:

'Saturation magnetization and crystal chemistry of ferrimagnetic oxides' -- subject(s): Crystallography, Metallic oxides, Magnetochemistry

No, ferromagnetic materials are strongly attracted to magnets due to their ability to become permanently magnetized. This attraction is a result of the alignment of magnetic domains within the material when exposed to a magnetic field.

A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. An everyday

example is a refrigerator magnet used to hold notes on a refrigerator door.

Materials that can be magnetized,

which are also the ones that are

strongly attracted to a magnet, are

called ferromagnetic (or ferrimagnetic). These include iron, nickel, cobalt, some alloys of rare earth metals, and some naturally occurring minerals such as lodestone.

The following minerals have magnetic properties:

Magnetite and hematite are ferromagnets.

Ferrites and garnets are ferrimagnetic.

Quartz, calcite, and mica are all magnetic. Although they have a small magnetic attraction, these minerals do not remain magnetic.