UGC-DAE Consortium for Scientific Research
( An Autonomous Institution of University Grants Commission, New Delhi )
Search   |   Webmail   |   Phonebook  |   Contacts

Magnetoresistance /specific heat (1.5K/8T)
Dr. Rajeev Rawat
UGC-DAE-CSR, Indore
Specific heat (1.5K/8T)

The in-field heat capacity measurement (based on semi-adiabatic heat pulse method) has been used for studying magnetic transition in manganites, intermetallic system and superconductors. In addition to providing various thermal parameters, it has been used to estimate the magnetocaloric effect in rare-earth intermetallic systems. Both, isothermal entropy change and adiabatic temperature change with the application of magnetic field can be calculated from in-field heat capacity measurements. This method of estimation is suited for compound with large magnetocaloric effect.
Resistivity/Magnetoresistance (1.5 K/8 T)
Resistivity/magnetoresistance as a function of temperature and magnetic field gives an insight to electric transport mechanism in a material. The simultaneous measurement of resistivity and magnetoresistance of eight samples provides an efficient method of characterizing materials. This facility is used extensively for investigating magnetotransport properties of manganites, intermetallics, quasicrystals, magnetic thin films/multilayers.
Specifications
No. of sample
: 16 (simultaneous measurement of eight samples).
Resistance
: maximum up to 1 Mega-ohm
Temperature range
: 1.5 300 K
Magnetic field
: 0-8 Tesla
Sensitivity
: ~0.001%
Typical sample requirement
: 15mm x 2 mm x 1mm bar shaped
Measurement geometry
: Longitudinal (current is parallel to applied magnetic field direction)
Specifications
Method
: Semi-adiabatic heat pulse method
Temperature range
: 4 300 K
Magnetic field
: 0 - 8 Tesla
Typical sample requirement
: pellet with ~500mg with one flat surface of less than 8mm dia.