Abstract
The hysteresis, especially the remanence, and the magnetostriction of nickel single crystal rods of 〈110〉, 〈111〉, 〈100〉 and medium orientation are measured at room temperature in a magnetic joke and their dependence on plastic deformation is investigated. In undeformed crystals the nucleation of reverse domains needs a negativeH-field several times the coercivity, thus causing an “overshooting” of the hysteresis. Very small plastic deformations initiate the formation of the reverse domains and destroy the overshooting. Similar to polycrystals, the remanence of the single crystals — except those with 〈100〉 as axis — falls steeply at the beginning of plastic deformation to about 40% of its initial value. The magnetization reversal and the role of nucleation processes are discussed for the different orientations.
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