Assertion: paper's material | /r/HasProperty | subjected to special processing
Facets:
value: in a strong magnetic field
type: LOCATION
value: to align their internal microcrystalline structure
type: PURPOSE
value: during manufacture
type: TEMPORAL
Source sentences:
text: Permanent magnets are made from "hard" ferromagnetic materials such as alnico and ferrite that are subjected to special processing in a strong magnetic field during manufacture to align their internal microcrystalline structure, making them very hard to demagnetize.