THE NATURE OF INDUCED ANISOTROPY,
Abstract
Current literature on magnetic anisotropy induced in ferromagnetic films during deposition is reviewed. The effects on anisotropy of thermal anneals, defects, impurity atoms, and mechanical stresses are considered. On the basis of the data on the kinetics of the processes occurring during the annealing one can draw the following conclusion: Base temperatures of about 100 degrees C are special in the sense that below and above this temperature the kinetics of the processes are accelerated. Possibly the phenomenon below 100 degrees C is in part related to some decrease in activation energy of the processes in connection with an increase in stress in the film with a decrease in base temperature. This assumption seems entirely valid, since with a decrease in base temperature the total number of point defects and the relative fraction of unordered vacancies increases. The reasons for the acceleration of the kinetics of the processes in films obtained at a temperature above 100 degrees C are still not clear. It is noted that there is much interest in studying the effects of impurities and rate of deposition on the kinetics of the formation of anisotropy. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 04, 1969
- Accession Number
- AD0692184
Entities
People
- A. G. Lesnik
- G. I. Levin
- V. M. Nedostup
Organizations
- National Air and Space Intelligence Center