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SQUID Magnetometer


The superconducting quantum interference device (SQUID) magnetometer is one of the most effective and sensitive ways of measuring magnetic properties. It allows to directly determine the overall magnetic moment of a sample in absolute units. The SQUID consists of two parallel Josephson junctions. When the sample is moved up and down it produces an alternating magnetic flux in the pick-up coil. The magnetic signal of the sample is obtained via a superconducting pick-up coil. This coil is, together with a SQUID antenna, part of a whole superconducting circuit transferring the magnetic flux from the sample to an rf SQUID device which is located away from the sample in the liquid helium bath. This device acts as a magnetic flux-to-voltage converter. This voltage is then amplified and read out by the magnetometer’s electronics. This system can detect low magnetic moments with a very high resolution of 10-7 emu.

Features Samples Description
(1) Temperature range 2–300 K (with the resolution of 0.1 K).
(2) Magnetic field range -7 to +7 T (with a resolution of 1 Oe)
(1) Bulk sample size < 5mm.
(2) Powder sample packed in non-magnetic Teflon tape.
(3) Thin film of width < 5mm.

Procedure for Sample Submission

The instrument booking will be done via the Google form. The payment of charges should be made in advance via SBI collect. A print copy of the SQUID Requisition Form with the sign of the Head/Supervisor/Guide should be produced at the time of measurements.

GU-SQUID job requisition Google form