Lakeshore 425 - Appendix A: Units for Magnetic Properties

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Appendix A: Units for Magnetic
Properties
A.1 Conversion
from CGS to SI
Units
Quantity Symbol
Gaussian
and CGS emu
a
Conversion factor,
C
b
SI and rationalized
mks
c
Magnetic flux density,
magnetic induction
Bgauss (G)
d
10
-4
tesla (T), Wb/m
2
Magnetic flux
φ
maxwell (Mx), G·cm
2
10
-8
weber (Wb),
volt second (V
·s)
Magnetic potential dif-
ference, magnetomotive
force
U,F gilbert (Gb)
10/4π
ampere (A)
Magnetic field strength,
magnetizing force
H oersted (Oe),
e
Gb/cm
10
3
/4π
A/m
f
(Volume) magnetization
g
Memu/cm
3h
10
3
A/m
(Volume) magnetization
4
πM
G
10
3
4π
A/m
Magnetic polarization,
intensity of magnetiza-
tion
J, I emu/cm
3
4π × 10
-4
T, Wb/m
2i
(Mass) magnetization
σ, M
emu/g
1
4
π × 10
-7
A·m
2
/kg
Wb
·m/kg
Magnetic moment memu, erg/G10
-3
A·m
2
, joule per
tesla (J/T)
Magnetic dipole moment j emu, erg/G
4
π × 10
-10
Wb·m
2
(Volume) susceptibility
χ,κ
dimensionless
emu/cm
3
—
(4
π)
2
× 10
-7
Henry per meter (H/
m), Wb/A
·m
(Mass) susceptibility
χ
ρ
, κ
ρ
cm
3
/g, emu/g
4
π × 10
-3
(4π)2 × 10
-10
m
3
/kg
H
·m
2
/kg
(Molar) susceptibility
χ
mol
, κ
mol
cm
3
/mol, emu/mol
4
π × 10
-6
(4π)
2
× 10
-13
m
3
/mol
H
·m
2
/mol
Permeability µ dimensionless
4
π
2
× 10
-7
H/m, Wb/A·m
Relative permeability
j
µ
r
not defined — dimensionless
(Volume) energy density,
energy product
k
Werg/cm
3
10
-1
J/m
3
Demagnetization factor D, N dimensionless
1/4
π
dimensionless
TABLE A-1 Conversion from CGS to SI units