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Measurement Of Susceptibility Of Solids By Gouy's Method

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Apparatus for Measurement of Susceptibility of Paramagnetic Solids by Gouy’s Method

In the Gouy’s method of susceptibility measurement, the solid sample in the form of a long cylinder (area of cross section A) is hung from the pan of a balance and is placed such that one end of the sample is between the pole-pieces of the magnet (field H) and the other one is outside the field. The force exerted on the
sample by the inhomogeneous magnetic field is obtained by measuring the apparent change ( m ) in the mass of the sample. The susceptibility is given by

c = 2 mg/AH2

If the sample is in the form of powder, it is filled in a long nonmagnetic tube which is then suspended from the pan of the balance.

The set up consists of the following:

a) Digital Balance, ATY224 SHIMADZU JAPAN

Capacity2200 gms
Readability0.0001 gms
Repeatability± 0.1 mg
Linearity± 0.2 mg
Pan Size± 90mm
StandardBidirectional RS-232 interface
Special FeatureWeight below hook for GMX-02

b) Sample in the form of a long rod

Aluminium sample and Glass Tube

c) Electromagnet, Model EMU-75T

Pole Peice75mm tappered to 25mm
Mag. Field20KG at 6mm airgap
Energising CoilsTwo of approx. 13Weach
Power0-90Vdc, 3A, for coils in series
0-45Vdc, 6A, for coils in parallel

d) Constant Current Power Supply, Model : DPS-175

e) Digital Gaussmeter, Model : DGM-202

f) GMX-02 Trolley, Model, GMX-TR2

The experiment is complete in all respect


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