Phone : +91-3222-283824
Location : OB / GF / 3, CRF

Professor-In-Charge
Dr. Amal Kumar Das
Department of Physics
amal@phy.iitkgp.ernet.in
+91-3222-283824

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Objectives

Measurement of magnetization, susceptibility, permeability as a function of temperature and magnetic field of bulk, film and powder samples.




People


Dr. Amal Kumar Das
Professors-In-Charge
Department of Physics
amal@phy.iitkgp.ernet.in
+91-3222-283824
Mr. Ronadhir Bosu
Technical Staff
Central Research Facility
abc21@xyz.com

Equipments


Vibrating Sample Magnetometer

Name- Vibrating Sample magnetometer (VSM)

Manufacturer- Lake Shore cryotronics, USA

Model- 7400 Series

Year of Installation- 2016

Specification: -

Sample cross- section   4.5mm × 4.5 mm ( 0.178in × 0.178 in )
Sample  height , maximum ~ 3.2mm (~ 0.125in )
Pin –to- pin spacing 0.9 mm (0.036in )
Total pin spacing 2.7 mm (0.108in )
Current 1 μA – 100μA
Compliance Voltage 5V
Contact formation User adjustable time, current , and voltage
Nominal resistance range 50mΩ – 10 MΩ
VSM compatibility 7400 series

 

Utility and Working Principal

A vibrating sample magnetometer (VSM) system is used to measure the magnetic properties of materials. The vibrating component causes a change in the magnetic field of the sample, which generates an electrical field in a coil based on Faraday’s Law of Induction. If the sample is placed within a uniform magnetic field H, a magnetization M will be induced in the sample. In a VSM, the sample is placed within suitably placed sensing coils, also held at the desired angle and the vibrating sample component is made to undergo sinusoidal motion, i.e., mechanically vibrated. The electromagnet activates before the testing starts so if the sample is magnetic, it will become more so the stronger the field that is produced. A magnetic field H appears around the sample and, once the vibration begins, and then the magnetization of the sample can be analysed as changes occur in relation to the timing of movement. Because magnetic flux changes induce a voltage in the sensing coils that is proportional to the magnetization of the sample. Changes in the signal are converted to values by the software to graph magnetization M versus the magnetic field H strength, often referred to as a hysteresis loop.

Sample Details

Choosing sample holder depends on your sample’s shape and size.

Thin film

Length < 1 cm , breadth < 0.5cm

Powder

15- 20 gm

Solid sphere diameter

2.8 mm

MH test of Ni (Standard Sample) sphere

  • Prof. Rahul Mitra, MME Department.
  • Prof. Amal Kumar Das, Physics Department.

Publications

Contact Us

Professor-In-charge

Prof. Amal Kumar Das

Department of Physics

Indian institute of Technology, Kharapur – 721302, West Bengal

Phone no. :-+91-3222-283824

Email: - amal@phy.iitkgp.ernet.in

 

Student-in-charge

Aquil Ahmad

Department of Physics

Indian Institute of Technology, Kharapur – 721302, West Bengal

Email: - aquil@phy.iitkgp.ernet.in

Technical staff

Rondhir Bosu

Contact no.: - 




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