Über den einflüss ausheilender punktfehler auf die koerzitivkraft von nickel-einkristallen im temperaturbereich zwischen--250° und 0°C

The interaction between different lattice defects and domain walls yields different temperature dependence of the coercive force Hc. This paper presents an experimental study of the temperature variation of the coercive field of plastically deformed nickel single crystals during recovery within the recovery stages III and IV. Hcis found to be a very sensitive quantity for the indication of recovery processes, if it is measured at low temperatures (78° K). A total recovery rate in these stages between 6 and 15 percent is observed, depending on orientation. It is very difficult to separate stages III and IV, which show a complicated substructure. The temperature dependence of Hcis expressed in the form (K1is the first constant of magnetocrystalline energy). The power is found to lie near one for crystals, between 1/4 and 1/2 for and between 1/12 and 1/8 for and orientation. The variation of with annealing temperature indicates a great influence of the dislocation network on the recovery process in stage IV.