Definition of permalloy in English:

Share this entry


Pronunciation: /ˈpərməˌloi/ Pronunciation: /ˌpərmˈaloi/


An alloy of nickel and iron that is easily magnetized and demagnetized, used in electrical equipment.
Example sentences
  • He and his colleagues deposited exquisitely thin loops of an easily magnetized nickel-iron compound called permalloy onto silicon wafers.
  • The readback portion of the head is a conventional permalloy shielded, bottom spin valve sensor.


1920s: (originally as a trademark) from permeable + alloy. See permeability (sense 2).

For editors and proofreaders

Syllabification: perm·al·loy

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.