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Internal magnetostatic potentials of magnetization-graded ferromagnetic materials
 

Summary: Internal magnetostatic potentials of magnetization-graded
ferromagnetic materials
C. Sudakar, R. Naik, and G. Lawesa
Department of Physics and Astronomy, Wayne State University, Detroit, Michigan 48202
J. V. Mantese and A. L. Micheli
Delphi Research Laboratories, Shelby Township, Michigan 48315
G. Srinivasan
Department of Physics, Oakland University, Rochester, Michigan 48309
S. P. Alpay
Materials Science and Engineering Program, University of Connecticut, Storrs, Connecticut 06269
and Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269
Received 21 November 2006; accepted 4 January 2007; published online 5 February 2007
The authors investigated the internal magnetic field induced by a spatially varying magnetization in
a compositionally graded ferromagnet. The authors discuss results on a hexagonal ferrite sample,
with a variation in saturation magnetization of 30 emu/g over a sample thickness of 2.5 mm. The
direct current magnetization shows a small anisotropy depending on the direction of the external
magnetic field relative to the grading direction. This contribution from a grading induced magnetic
field is more pronounced in alternating current susceptibility measurements. The authors find a shift
in magnetic properties corresponding to an internal magnetic field of 30 Oe, which is significantly
lower than the predicted value of approximately 1900 Oe. The authors discuss reasons for this

  

Source: Alpay, S. Pamir - Department of Materials Science and Engineering, University of Connecticut

 

Collections: Materials Science