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- Wiegand_effect abstract "The Wiegand effect is a nonlinear magnetic effect, named after its discoverer John R. Wiegand, produced in specially annealed and hardened wire called Wiegand wire.Wiegand wire is low-carbon Vicalloy, a ferromagnetic alloy of cobalt, iron, and vanadium. Initially, the wire is fully annealed. In this state the alloy is "soft" in the magnetic sense; that is, it is attracted to magnets and so magnetic field lines will divert preferentially into the metal, but the metal retains only a very small residual field when the external field is removed.During manufacture, to give the wire its unique magnetic properties, it is subjected to a series of twisting and untwisting operations to cold-work the outside shell of the wire while retaining a soft core within the wire, and then the wire is aged. The result is that the magnetic coercivity of the outside shell is much larger than that of the inner core. This high coercivity outer shell will retain an external magnetic field even when the field's original source is removed.The wire now exhibits a very large magnetic hysteresis: If a magnet is brought near the wire, the high coercivity outer shell excludes the magnetic field from the inner soft core until the magnetic threshold is reached, whereupon the entire wire — both the outer shell and inner core — rapidly switches magnetisation polarity. This switchover occurs in a few microseconds, and is called the Wiegand effect.The value of the Wiegand effect is that the switchover speed is sufficiently fast that a significant voltage can be output from a coil using a Wiegand-wire core. Because the voltage induced by a changing magnetic field is proportional to the rate of change of the field, a Wiegand-wire core can increase the output voltage of a magnetic field sensor by several orders of magnitude as compared to a similar coil with a non-Wiegand core. This higher voltage can easily be detected electronically, and when combined with the high repeatability threshold of the magnetic field switching, making the Wiegand effect useful for positional sensors.Once the Wiegand wire has flipped magnetization, it will retain that magnetization until flipped in the other direction. Sensors and mechanisms that use the Wiegand effect must take this retention into account.The Wiegand effect is a macroscopic extension of the Barkhausen effect, as the special treatment of the Wiegand wire causes the wire to act macroscopically as a single large magnetic domain. The numerous small high-coercivity domains in the Wiegand wire outer shell switch in an avalanche, generating the Wiegand effect's rapid magnetic field change.".
- Wiegand_effect thumbnail Wiegand_effect.svg?width=300.
- Wiegand_effect wikiPageID "24031904".
- Wiegand_effect wikiPageLength "5818".
- Wiegand_effect wikiPageOutDegree "22".
- Wiegand_effect wikiPageRevisionID "672419757".
- Wiegand_effect wikiPageWikiLink Alloy.
- Wiegand_effect wikiPageWikiLink Annealing_(metallurgy).
- Wiegand_effect wikiPageWikiLink Barkhausen_effect.
- Wiegand_effect wikiPageWikiLink Category:Magnetic_ordering.
- Wiegand_effect wikiPageWikiLink Clock_track.
- Wiegand_effect wikiPageWikiLink Cobalt.
- Wiegand_effect wikiPageWikiLink Coercivity.
- Wiegand_effect wikiPageWikiLink Ferromagnetic.
- Wiegand_effect wikiPageWikiLink Ferromagnetism.
- Wiegand_effect wikiPageWikiLink Hardening_(metallurgy).
- Wiegand_effect wikiPageWikiLink Iron.
- Wiegand_effect wikiPageWikiLink John_R._Wiegand.
- Wiegand_effect wikiPageWikiLink Keycard.
- Wiegand_effect wikiPageWikiLink Keycard_lock.
- Wiegand_effect wikiPageWikiLink Magnetic_hysteresis.
- Wiegand_effect wikiPageWikiLink Magnetic_stripe_card.
- Wiegand_effect wikiPageWikiLink Rotary_encoder.
- Wiegand_effect wikiPageWikiLink Vanadium.
- Wiegand_effect wikiPageWikiLink Vicalloy.
- Wiegand_effect wikiPageWikiLink Wheel_speed_sensor.
- Wiegand_effect wikiPageWikiLink Wiegand_interface.
- Wiegand_effect wikiPageWikiLink Wire.
- Wiegand_effect wikiPageWikiLink File:Wiegand_effect.svg.
- Wiegand_effect wikiPageWikiLinkText "Wiegand Sensor".
- Wiegand_effect wikiPageWikiLinkText "Wiegand effect".
- Wiegand_effect wikiPageWikiLinkText "Wiegand effect#Wiegand keycards".
- Wiegand_effect wikiPageWikiLinkText "Wiegand products".
- Wiegand_effect wikiPageWikiLinkText "Wiegand wire".
- Wiegand_effect wikiPageWikiLinkText "Wiegand".
- Wiegand_effect hasPhotoCollection Wiegand_effect.
- Wiegand_effect wikiPageUsesTemplate Template:Reflist.
- Wiegand_effect wikiPageUsesTemplate Template:US_Patent.
- Wiegand_effect subject Category:Magnetic_ordering.
- Wiegand_effect hypernym Effect.
- Wiegand_effect type Disease.
- Wiegand_effect type Physic.
- Wiegand_effect comment "The Wiegand effect is a nonlinear magnetic effect, named after its discoverer John R. Wiegand, produced in specially annealed and hardened wire called Wiegand wire.Wiegand wire is low-carbon Vicalloy, a ferromagnetic alloy of cobalt, iron, and vanadium. Initially, the wire is fully annealed.".
- Wiegand_effect label "Wiegand effect".
- Wiegand_effect sameAs Wiegand-Sensor.
- Wiegand_effect sameAs ウィーガント・ワイヤ.
- Wiegand_effect sameAs Efekt_Wieganda.
- Wiegand_effect sameAs m.06g5nx.
- Wiegand_effect sameAs Q445074.
- Wiegand_effect sameAs Q445074.
- Wiegand_effect wasDerivedFrom Wiegand_effect?oldid=672419757.
- Wiegand_effect depiction Wiegand_effect.svg.
- Wiegand_effect isPrimaryTopicOf Wiegand_effect.