Crossword clues for permalloy
Wiktionary
n. Any of a class of nickel / iron alloys that have a high magnetic permeability
Wikipedia
Permalloy is a nickel– iron magnetic alloy, with about 80% nickel and 20% iron content. Invented in 1914 by physicist Gustav Elmen at Bell Telephone Laboratories, it is notable for its very high magnetic permeability, which makes it useful as a magnetic core material in electrical and electronic equipment, and also in magnetic shielding to block magnetic fields. Commercial permalloy alloys typically have relative permeability of around 100,000, compared to several thousand for ordinary steel.
In addition to high permeability, its other magnetic properties are low coercivity, near zero magnetostriction, and significant anisotropic magnetoresistance. The low magnetostriction is critical for industrial applications, allowing it to be used in thin films where variable stresses would otherwise cause a ruinously large variation in magnetic properties. Permalloy's electrical resistivity can vary as much as 5% depending on the strength and the direction of an applied magnetic field. Permalloys typically have the face centered cubic crystal structure with a lattice constant of approximately 0.355 nm in the vicinity of a nickel concentration of 80%. A disadvantage of permalloy is that it is not very ductile or workable, so applications requiring elaborate shapes, such as magnetic shields, are made of other high permeability alloys such as mu metal. Permalloy is used in transformer laminations and magnetic recording heads.
Usage examples of "permalloy".
Equip each of them with a bulger, permalloy semi-rigid model, and check the heating units.
A hemispherical Dome of permalloy, artificially heated and air-controlled but otherwise not at all equipped for the sustenance of life.
Caleb bent over the permalloy bowl before him and gave up the contents of his last meal.
Test Room 4, a gleaming permalloy shell with no crack in the walls, no furnishings but the permalloy benches and table.
She backed up a step, frozen with horror, while her intended victim swung one real leg and one permalloy prosthesis out of bed, fussily straightened her gown, and produced a plastic bag from under the pillow.
Micaya as the general picked her way along a path of rounded volcanic stones to the door of the permalloy hut.
Polyon fixed his eyes on one small sector of the cabin, where braces supporting an extruded shelf formed a simple closed curve of permalloy and plastifilm.
Polyon fixed his eyes on one small sector of the cabin, where braces supporting an extruded shelf formed a simple dosed curve of permalloy and plas- Ofilm.
And the contractor who'd installed nets of electronic impulse chargers behind the permalloy skin, making the room impervious to any known external monitors, had suffered a fatal overdose of Blissto shortly after the completion of the room.