Oersted

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oersted

[′ər·stəd]
(electromagnetism)
The unit of magnetic field strength in the centimeter-gram-second electromagnetic system of units, equal to the field strength at the center of a plane circular coil of one turn and 1-centimeter radius, when there is a current of 1/(2π) abamp in the coil; 1 oersted corresponds to approximately 79.577 amperes per meter.

Oersted

 

the unit of magnetic field intensity in the cgs system of units. Named in honor of H. C. Oersted, its symbol is Oe. One oersted is equal to the strength of a magnetic field produced at a distance of 2 cm from an infinitely long straight conductor of infinitesimal circular cross section carrying a current with a strength of 1 cgs unit (that is, 10 amperes).

In technical practice, the oersted is gradually being replaced by the SI unit, ampere-turns per meter: 1 Oe = 103/(4π) ampereturns/m = 79.5775 ampere-turns/m.

Oersted

Pronounced "erst-ed." The measurement of magnetic energy. The higher the Oe rating in a material, the more current is required to change its magnetic polarity. Named after the Danish scientist, Hans Cristian Oersted (1777-1851), it is used, for example, to measure the coercivity point on magnetic media. See coercivity.
References in periodicals archive ?
The higher the coercivity, which is measured in Oersteds (Oe), the harder the data is to erase.
The majority of permanent magnets used in commercial dc motors are made from ceramic-ferrite materials whose energy product is roughly 3 1/2 Mega Gauss Oersteds (MGOe).
Tapes with coercivities up tp 350 Oersteds (Oe.) are categorized as "type I," while the coercivities of high-energy "type II" tapes range from 350 Oe.