MPMS a PPMS

V septembri 2006 boli inštalované v novom spoločnom laboratóriu ÚEF SAV a PF UPJŠ aparatúry PPMS and MPMS od firmy Quantum Desing. PPMS umožní merania termodynamických a transportných vlastností v magnetických poliach do 9 T až do teploty 350 mK a MPMS umožní DC a AC magnetické merania v poliach do 5 T a vo veľmi nízkych poliach a do teploty 0,45 K.

MPMS (Magnetic properties measurement system) XL-5

Maximum sample size: 9 mm
Field uniformity: 0.01% over 4 cm
Temperature range: 1.8 – 400 K

MPMS OPTIONS:

• SQUID AC Susceptibility Measurement (*) - 0.1Hz to 1KHz;
  sensitivity: 2 x l0-8 emu at 0 T
• Ultra-Low Field Capability (*) ±0.05 G for the 5 T or 7T magnets
• Reciprocating Sample Option (RSO) - DC Magnetization absolute sensitivity: 1 x 10-8 emu@ 2,500 Oe
• Continuous Low Temperature
• Control/Temperature Sweep Mode (CLTC) - Sweep rate: 0.001 - 10 K/min
• iHelium3 insert for temperatures down to 0.45 K (dc and ac measurements)

PPMS (Physical properties measurement system):

equipment for automated measurement of physical properties in temperature range: 350 mK – 350 K
in magnetic field up to 9 T
Heat capacity, el. and thermal transport, magnetometer

Temperature Accuracy: 0.5% @ 0 T
Sample Size: 1 to 500 mg; 20 mg typical
Heat Capacity Range:
1 mJ/K to 100 mJ/K
Resolution: 10 nJ/K @ 2 K
electrical resistivity, Hall voltage
Voltage Noise: 0.5 nV/ 0.5 nV/ Hz @ 1 kHz
Voltage Sensitivity: 1 nV
Current Range: 10 mA to 2 A (500 mA continuous)
Frequency Range: 1 Hz to 1 kHz