Effect of Local Anisotropy Fluctuation on the Permeability of Multilayered Co-Zr-Mo-Ni Amorphous Films
To evaluate the magnetic inhomogeneities normally represented as magnetic skew and ripple, a systematic experimental investigation was carried out using the dynamic differential susceptibility measurement proposed by H. Hoffmann for multilayered CO79Zr10Mo9Ni2 amorphous films. The influence of the local magnetic anisotropy on the effective permeability μeff of the films is broadly discussed in connection with the magnetic skew and ripple. The magnitude of the μeff in low frequency regions less than 1 MHz is strongly dependent on the degree of the long period fluctuation of the local magnetization direction (skew) and the magnitude of the anisotropy field. To realize excellent soft magnetic properties in films at high frequencies (10 MHz), it is suggested that the alleviation of magnetic inhomogeneities due to the short-period fluctuation of the local magnetization direction is important.
The Effective Field and the Differential Susceptibility in Ferromagnetic Films
A theory of the differential susceptibility is given for two-dimensional ferromagnetic samples. The susceptibility depends on the intrinsic demagnetizing field which is caused by the magnetization inhomogeneities. The susceptibility is related to the mean “effective field” as well as to the magnetization fluctuation. Its measurement can be used to determine quantitatively these properties which are related to the structure constant, S. The latter results from the inhomogeneity of the anisotropy. 
 
 
 
Es wird eine Theorie der differentiellen Suszeptibilitat in zweidimensionalen ferromagnetischen Proben hergeleitet, um damit die Anwendungsmoglichkeiten quantitativer mikromagnetischer Berechnungen aufzuzeigen. Die Suszeptibilitat in schwachen auseren Feldern wird wesentlich mitbestimmt durch das von Probeninhomogenitaten verursachte innere entmagnetisierende Feld. Die Suszeptibilitat ist mit dem „Effektivfeld” und den Schwankungen der Magnetisierungsrichtungen eng verknupft und kann zur Ermittlung beider Grosen herangezogen werden. Beide werden durch die Strukturkonstante S bestimmt, in welcher die inhomogenen Energieanteile der Probe zum Ausdruck kommen.
Finite Difference Modeling on the Temperature Field of Substrate in Friction Surfacing
Friction surfacing is an advanced process of great potential, especially in the field of repair and reclamation of worn and damaged components. As a kind of thermal processing technology, the temperature profile and changes of the substrate in friction surfacing are important factors to get coatings of high quality. In this paper, the temperature field of the substrate during the process is simulated by finite difference method. The results are consistent with experiments, reappearing the temperature change of the substrate during friction surfacing, allowing further study on figuration and quality of coatings.