Accession Number : AD0428026
Title : AN INVESTIGATION OF THE EFFECTS OF SOLUTE ELEMENTS ON THE MAGNETOELASTIC DAMPING AND COERCIVITY IN VERY PURE IRON.
Descriptive Note : Summary rept.,
Corporate Author : BATTELLE MEMORIAL INST GENEVA (SWITZERLAND)
Personal Author(s) : Maringer,R. E.
Report Date : 15 JAN 1964
Pagination or Media Count : 22
Abstract : Ferromagnetic domain walls tend to move in phase with an alternating stress or magnetic field. This movement is opposed by the presence of directionally ordered interstitial atoms. When the time associated with the relaxation process is of the order of the period of the moving walls, a phase lag between the applied field and the domain-wall movement occurs. This phase lag, coupled with normal hysteresis losses, causes the appearance of a variety of magnetic and magnetoelastic phenomena. Among these are a strong temperature dependence of the a-c magnetic permeability and a broad internal-friction peak in the temperature range of the Snoek peaks. These phoenomena can be interpreted in terms of viscoelastic theory, with a relaxation process (interstitial directional ordering) having a unique activation energy. (Author)
Descriptors : (*IRON, DAMPING), (*DAMPING, IRON), (*MAGNETIC PROPERTIES, ELASTIC PROPERTIES), (*ELASTIC PROPERTIES, MAGNETIC PROPERTIES), SOLUBILITY, MAGNETIC PROPERTIES, FERROMAGNETISM, FERROMAGNETIC MATERIALS, ATOMS, TIME, HYSTERESIS, TEMPERATURE, VISCOELASTICITY, THEORY
Distribution Statement : APPROVED FOR PUBLIC RELEASE