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Electrical and Magnetic Properties

Electrical and Magnetic Properties

Jan 03, 2025

Newly Installed Equipment Highlights

Probe station LakeShore CRX-VF: 2.5 Tesla vertical B-field, Temp from10 K - 500 K, DC to 40 GHz probing

Probe station MicroXact CPS-50-HT: up to 900 C, high vacuum or inert gas, DC up to 40 GHz (RF to 500 C)

Probe station LakeShore CRX-4K: 4.5 K - 350 K, DC to 40 GHz probing

Probe station FormFactor PAV200: semi-automatic 8" wafer scale probing from DC to 67 GHz, high vacuum (1e-6 torr), up to 300 C

Real-time oscilloscope Keysight DSOV134A: 13 GHz, 80/40 GSa/s, 4-port

Arbitrary Waveform Generator Keysight M8195A: 65 GSa/s, 16 GSa memory, sequencer, fast switching, 4 channels

Vector network analyzer Copper Mountain S5243: 10 MHz - 44 GHz, 2 port

Semiconductor Parameter Analyzers Keysight B1500A and Keithley 4200A: combined multi-frequency C-V and I-V, hi-res SMUs (<10 fA)

High current-voltage curve tracer bundle Keithley 2651A/2657A/2636B/4200A-SCS: I-V and C-V to 2 kV / 100 amp

Advanced low frequency noise analyzer Keysight E4727B A-LFNA: 30 mHz - 100 MHz

32-channel digital pattern instrument NI PXIe-6571

 

New recharge facility in Wang Hall: RF measurements

Suite of Keysight equipment for advanced RF measurements including

Overview

Electrical Properties

Probe stations are used in conjunction with semiconductor parameter analyzers, lock-in amplifiers, function generators, and curve tracers to electrically drive devices and measure the performance and outputs of semiconductors, metals, superconductors, and transistors.

  • Eight probe stations (LakeShore, Cascade, FormFactor, MM, Jandel) both inside and outside the clean room, providing a temperature range of 4.5 K up to 1173 K (900 C) and magnetic fields up to 2.5 T; Environments can be air, vacuum or inert gas, and measurements can be made from DC to RF (40 GHz) in time or frequency domain

  • Quantum Design DynaCool PPMS cryogen-free platform provides 1.8 – 400 K temperature range and magnetic fields up to 9 T

  • Oxford Triton cryogen-free dilution refrigerator provides temperatures down to 10 mK and magnetic fields up to 12 T

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Magnetic Properties

These instruments measure the magnetic fields emanating from, or inside of, the material under study. This allows us to quantify the total number of magnetic spins in a material, its magnetic anisotropy, magnetic phase transitions and GHz spin dynamics. Samples can be thin films, powder, bulk or single crystals.  Equipment includes:

Quantum Design MPMS-3 EverCool SQUID magnetometer:

  • high sensitivity <10-8 emu (10-11 A-m2) noise floor

  • temperature from 1.8 – 1000 K

  • magnetic field up to ±7 tesla

  • SQUID AC susceptibility from 0.1 – 1000 Hz

  • High speed: m(H) loops in minutes

  • Samples: film, bulk, crystals, powder

  • 8mm diameter sample space (4x4mm film typical)

Quantum Design DynaCool PPMS:

  • Vibrating sample magnetometer (VSM) with <10-6 emu sensitivity

  • Broadband ferromagnetic resonance (FMR) up to 18 GHz

  • Temperature from 1.8 – 400 K

  • Magnetic field up to ±9 tesla

DynaCool PPMS is also equipped for thermal measurements:

  • Bulk thermal conductivity, Seebeck coefficient, Nernst effect, thermoelectric ZT

  • Heat capacity microcalorimeter

Research scientists in charge:

Quantum Design lab - Neil Dilley

Probe station lab - Angshuman Deka

Wang Hall RF lab - Ahmad Darwish

 

Station name

location

# probes

Sample size max

Chuck bias?

Stage temp range

Comments/features

Probe 1 - Cascade MPS150 DC probe station

2043

4

4 inch

yes

20 to 200 C

 

MM P200L semi-automatic probe station

2043

4

8 inch

yes

-65 to +400 C

Semi- Automatic wafer mapping Probe Station.

PAV200 semi-automatic probe station

2043

4DC/2RF

8 inch

yes

25 C to 300 C

Semi- Automatic wafer mapping Probe Station.

LakeShore CRX-VF probe station

2043

4DC/2RF

2 inch

yes

10 - 500 K

2.5 tesla vertical B-field; RF to 40 GHz

LakeShore CRX-4K probe station

2043

4DC/2RF

2 inch

yes

25 - 900 K

DC to 40 GHz, High Temperature RF upto 500 C

MicroXact CPS50 HT probe station

2043

        4DC/2RF

2 inch

yes

4.5 - 350 K

DC to 40 GHz

Jandel 4-point probe

2043

              4

N/A

N/A

N/A

Sheet resistance measurements

MDC Mercury probe

2043

2

4 inch

yes

N/A

CV characterization of non contact sample

MM 6000 Cleanroom DC Probe station

Q Bay

4

4 inch

yes

N/A

Cleanroom probe station

Desert Cryo probe station

2069

4

2 inch

 

3.2K to 675K

PI: Peide Ye

Oxford Triton Dilution Refrigerator

F Bay

 

 

 

 

PI: Peide Ye

Quantum Design DynaCool PPMS

1157

12

10mm

 

1.8 – 400 K

B= 9 tesla; Feedthru for any rack electronics

Quantum Design MPMS-3 SQUID Magnetometer

1157

8

5mm

 

1.8 – 400 K

B = 7 tesla; Feedthru for any rack electronics

Suss PLV50 DC probe station

1089A

4

4 inch

 

 

LDV compatible

Alessi probe station

2037

 

 

 

 

PI: Alam

Cascade Summit probe station

2037

 

 

 

 

PI: Alam

Nextron probe station (on optical table)

2037

4

 

 

down to 77 K

vacuum, controlled atmosphere; PI: Hussain

MMR probe station (on optical table)

2037

4

 

 

 

vacuum, controlled atmosphere; PI: Hussain

Cascade PMC 200 DC/RF probe station

1083

4RF/2DC

6 inch

Yes

7  to 473 K

Low Noise, high vacuum Probe Station. PI: Dana Weinstein

instrument

frequency
range

source/measure

comments

V

I

R

Agilent 4156C

DC

0 - 100 V
µV – 100 V

10 fA – 100 mA
fA – 100 mA

 

I-V, C-V, pulsed ; precision semiconductor parameter analyzer;
measure specs for HRSMU ; voltage input impedance > 1015  Ω

Keithley 4200A-SCS parameter analyzer

DC I-V
low freq C-V

0 ± 210 V
0.2 µV – 100 V

0 ± 100 V
100 fA – 1 A

 

I-V, C-V, pulsed I-V

Keysight E4990A impedance analyzer

20 Hz – 50 MHz

 

 

 

measures complex impedance;
DC biasing (V or I) also possible

Hewlett Packard 4284

20 Hz - 1 MHz

 

 

 

measures complex impedance;
DC biasing (V or I) also possible

Keysight B1500A parameter analyzer

DC I-V

1 kHz to 5 MHz C-V

 

 

 

 

Keysight DSOV134A oscilloscope

13 GHz BW

4 Analog Channels

80 GSa/s

 

 

 

 

Keysight M8195A arbitrary waveform generator

DC to 25 GHz BW

65 GSa/s

16 GSa memory

 

 

 

 

Copper Mountain S5243 VNA

10 MHz - 44 GHz

2 Port

 

 

 

 

Keithley High Power Measurement Suite

DC or Pulsed

 

Source or sink up to 180 W

±3000 V @ 20 mA

±1500 V @ 120 mA

2,000 W of pulsed power (±40 V, ±50 A)

200 W of DC power (±10 V @ ±20A, ±20 V @ ±10 A, ±40 V @ ±5 A)

 

 

 

instrument

frequency

range

source/measure

comments

V

I

R

Keithley 2182A nanovoltmeter

DC

nV – 100 V

 

 

most sensitive DC voltage measurement from Keithley

Keithley 2000 multimeter

DC

µV –  kV

0.1 µA – 3 A

µΩ – 100 MΩ

 

Keithley 2400 sourcemeter

DC

µV – 200 V
µV – 200 V

10 pA – 1 A
10 pA – 1 A

 µΩ – 10 GΩ

 

Keithley 2636B sourcemeter

DC

5 µV – 200 V
100 nV – 200 V

1 fA – 1.5 A
100 aA – 1 A

 µΩ – TΩ

sense input impedance >1014 Ω

Keithley 6221 DC/AC current source

DC – 100 kHz

 

1 pA – 100 mA

 

output resistance >1014 Ω

Keithley 6487
pA-meter / V src

DC

mV – 500 V

 20 fA – 20 mA

 

 

SR830 lock-in amplifier

1 mHz – 102 kHz

6 mV – 7 V
8 nV/√Hz

 106 or 108 V/A

 

digital lock-in; input impedance = 10 MΩ (V); 1 kΩ (I);
noise level at 1 kHz

SR560 preamp

DC - MHz

 6 nV/√Hz

 

 

input impedance = 100 MΩ; noise level at 1 kHz;
gain: 1 – 50,000

Stanford DS345 function generator

DC – 30 MHz