AC Susceptometer/DC Magnetometer

Temperature Range:
< 4.2 K to 325 K

AC/DC magnetic field Range : from 0.1 to 1600 A/m

AC susceptibility sensitivity :

2 * 10 -8 emu
DC moment sensitivity :

9 * 10 -5 emu

5 Tesla superconducting Magnet Specifications:
Field Range :

+/-50000 gauss (+/- 5 Tesla)

Field Resolution :

< 1 gauss, -50000 gauss to +50000 gauss

Remnant field:

15 gauss

(<0.5 gauss after demagnetization cycle)

First harmonic ac magnetic susceptibility as a function of temperature, for an MgB2 sample

measured at various dc fields
Magnetization hysteresis loops measured at different temperatures for an MgB2 sample

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Magneto-optical

measurement set-up

 

DC Magnetic field
Range:

0 to 1800 Oe

Available magnification:
50x

100x

200x

400x

Resolution
Optical: 1micron
Magnetic:

1 Oe


Remnant state at 5 K after an applied field 150 Oe.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Home-made transport

measurement set-up

Temperature range:
10 K - 325 K


dc current range:
10-6 A - 3.0 A

Voltage resolution:
1 nA.

 

Available characterizations:

- resistence vs temperature
- I – V characterization at constant temperature

in magnetic field up to 6 T

R vs. T curve.

Bias current

10 mA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Microwaves measurement

set-up

 

click to enlarge

temperature range: 3 - 325 K
dc magnetic field range:

0-100 Oe (custom-made high uniformity magnet)

0-6 T (in the Cryogen Free Magnet)
main specifications of the ZVK Rohde-Schwarz Vector Network Analyzer

frequency range: 10MHz - 40GHz

dynamic range: >80dB

measurement time per point: <1.1ms

output power (with step attenuators): -90dBm - 0dBm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


Cryogen Free Magnet

apparatus

Superconducting Magnet :
custom solenoid
Rated central field :
60000 gauss
Rated operating current (60 kgauss) :
78.2 amperes
Total inductance:
21.6 henries
Superconductor :
twisted Multifilamentary NbTi/Cu
Field to current ratio :
767.26 gauss/ampere
Magnet resistance :
1703 ohms at room temperture
Charge rate Up & down :
0.04 amps/sec to 50 amperes
0.02 amps/sec to 78.2 amperes