EXPERIMENTAL DETERMINATION OF EFFECTIVE DEMAGNETIZING FACTORS FOR A SHORT CYLINDER

Geophysics ◽  
1975 ◽  
Vol 40 (3) ◽  
pp. 527-529 ◽  
Author(s):  
Knut Åm ◽  
Rune Otto Stemland
Keyword(s):  
Magnetic Properties ◽  
Experimental Determination ◽  
Axial Ratio ◽  
High Susceptibility ◽  
Magnetite Ore ◽  
Demagnetizing Factor ◽  
Short Cylinder

Comparison between measurements on spheres and cylinders shows that a short cylinder with axial ratio (length/diameter) ≃0.9 and susceptibility ≃0.8 (cgs) has an effective demagnetizing factor N ≃ 3.7 both in the axial and radial directions. Hence, for a short cylinder with high susceptibility, the sum of the effective demagnetizing factors in three mutually perpendicular directions is less than 4π. This is important to know e.g., when determining the magnetic properties of highly magnetic magnetite ore samples.

On: “Experimental determination of effective demagnetizing factors for a short cylinder” by Knut Åm and Rune Otto Stemland (GEOPHYSICS, v. 40, p. 527–29)

Geophysics ◽  
1976 ◽  
Vol 41 (4) ◽  
pp. 774-775
Author(s):  
Sven‐Erik Hjelt
Keyword(s):  
Experimental Determination ◽  
The Other ◽  
Other Hand ◽  
Demagnetizing Factor ◽  
Short Cylinder ◽  
The One

The authors have introduced the concept of effective demagnetizing factor to be used when measuring susceptibilities of highly magnetized samples. They have used one experiment to show that the factor thus defined differs considerably from factors computed theoretically. From its definition, it seems obvious that the numerical value of the effective demagnetizing factor will depend on the measuring geometry and, more so, on the shape of the sample. Furthermore, the relation between the new demagnetizing factor and susceptibilities calculated using it on the one hand, and true magnetization on the other hand, is far from trivial.

Experimental determination of a state equation for dissipative granular gases

1999 ◽  
Vol 96 (6) ◽  
pp. 1111-1116 ◽  
Author(s):  
E. Falcon ◽  
S. Fauve ◽  
C. Laroche
Keyword(s):  
Experimental Determination ◽  
State Equation ◽  
Granular Gases

AN EXPERIMENTAL DETERMINATION OF ISOLATED BUBBLE ACOUSTICS IN A NUCLEATE BOILING SYSTEM

1974 ◽  
Author(s):  
G. E. Robinson ◽  
Frank W. Schmidt ◽  
H. R. Block ◽  
G. Green
Keyword(s):  
Experimental Determination ◽  
Nucleate Boiling
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