8400 Series HMS
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8400 Series HMS

Lake Shore

The Lake Shore 8400 Series can be used with both DC and AC field Hall measurement methodologies to facilitate the broadest range of research applications. The system includes fully integrated instrumentation, a magnet and power supply, plus software that dramatically helps you increase your research productivity and provides results that you can trust.

When used with the AC field measurement option, the system is ideal for use with emerging class of materials that typically have mobilities below 1 cm2/V s—the types of materials with electronic properties that can be difficult or impossible to measure with traditional DC field Hall methods. These include many contemporary semiconductor and electronic materials, such as photovoltaic (solar cell) and thermoelectric materials, new display technologies, and organic electronics.

The standard system is capable of DC field measurements and has a resistance range from 0.5 mΩ to 10 MΩ. Measure Hall voltage, Hall coefficient, Hall mobility, and resistivity. With options added, the system allows you to measure down to 0.5 µΩ and as high as 200 GΩ in DC fields. You can also determine carrier density and carrier mobility versus temperature.

For temperature-dependent applications, the 8400 Series options enable you to measure samples from 15 K to 1273 K with a closed-cycle refrigerator and high-temperature oven, or take dedicated 77 K measurements with an optional single-point LN 2 body.
The 8400 Series HMS provides a robust platform that can be configured to meet your specific needs and supports the addition of new features as your material measurement needs evolve. An assortment of options including variable temperature assemblies, high and low resistance, and optical access broaden your measurement opportunities and simplify experimental processes.

Features of the 8400 Series

•Ideal for variable temperature measurement and mobilities from 1 to 106 cm2/V s
•Optional AC field extends mobility measurement range down to 10-3 cm2/V s
•Maximum DC fields to 1.67 T (8404) and 2.25 T (8407)
•Optional AC fields to 1.18 T (8404) and 1.31 T (8407)
•Standard resistance range of 0.5 mΩ to 10 MΩ
•High resistance option widens range to 200 GΩ
•Low resistance option significantly reduces resistance noise floor
•Temperatures from 15 K to 1273 K

    Pole cap (in) Air gap (in) DC (T) AC RMS (T)
Model 8404 At room temperature 2 (standard) 1 1.67 1.18
4 (optional) 1 1.35 0.95
With variable temperature option 2 (standard) 2 0.89 0.63
4 (optional) 2 0.88 0.62
Model 8407 At room temperature 4 (standard) 1 2.10 1.20
2 (optional) 1 2.25 1.31
With variable temperature option* 4 (standard) 2 1.45 0.69
2 in pole caps not recommended for use with variable temperature in the 8407

8400 Series Specifications

  8404 8407
  DC AC DC AC
Measurement specifications
Mobility 1 to 1 × 106 cm2/v s 1 × 10-3 to 1 × 106 cm2/v s 1 to 1 × 106 cm2/v s 1 × 10-3 to 1 × 106 cm2/v s
Carrier concentration density 8 × 102 to 8 × 1023 cm-3 8 × 102 to 8 × 1023 cm-3
Resistivity 1 × 10-5 to 1 × 105 Ω·cm 1 × 10-5 to 1 × 105 Ω·cm
Electronic specifications*
Standard resistance range

±0.5% rdg ±0.5% range:
VdP/Hall bar minimum: 0.5 mΩ
Maximum: 10 MΩ

±0.075% rdg ±0.05% range:
Maximum: 5 MΩ

VdP/Hall bar: 0.5 mΩ to 10 MΩ

300 nV RMS noise floor for sample resistances up to 100 Ω;
500 nV RMS over most of the recommended resistance range above 100 Ω

±0.5% rdg ±0.5% range:
VdP/Hall bar minimum: 0.5 mΩ
Maximum: 10 MΩ

±0.075% rdg ±0.05% range:
Maximum: 5 MΩ

VdP/Hall bar: 0.5 mΩ to 10 MΩ

300 nV RMS noise floor for sample resistances up to 100 Ω;
500 nV RMS over most of the recommended resistance range above 100 Ω

Optional high resistance configuration

±0.25% rdg:
VdP/Hall bar minimum: 10 kΩ
Maximum: 50 GΩ

±1.5% rdg:
Maximum: 100 GΩ

±5% rdg:
Maximum: 200 GΩ

VdP/Hall bar: 10 kΩ to 8 GΩ

<1250 nV RMS noise floor for
sample resistances up to 10 MΩ

±0.25% rdg:
VdP/Hall bar minimum: 10 kΩ
Maximum: 50 GΩ

±1.5% rdg:
Maximum: 100 GΩ

±5% rdg:
Maximum: 200 GΩ

VdP/Hall bar: 10 kΩ to 8 GΩ

<1250 nV RMS noise floor for
sample resistances up to 10 MΩ

Optional low resistance configuration
Resistance Low resistance voltage noise floor
<0.1 Ω 5 nV
<10 Ω 30 nV
<100 kΩ 150 nV

For resistance larger than 10 Ω, the voltage noise floor is independent of current for currents less than 1 mA.
NA
Resistance Low resistance voltage noise floor
<0.1 Ω 5 nV
<10 Ω 30 nV
<100 kΩ 150 nV

For resistance larger than 10 Ω, the voltage noise floor is independent of current for currents less than 1 mA.
NA
Current ±1 pA to ±100 mA ±1 pA to ±100 mA
Compliance voltage 100 V 100 V
Environment
Room temperature field**
(25 mm [1 in] airgap)
1.67 T with standard
50 mm (2 in) pole caps
1.35 T with optional
100 mm (4 in) pole caps
1.18 T with standard
50 mm (2 in) pole caps
0.95 T with optional
100 mm (4 in) pole caps
2.10 T with standard
100 mm (4 in) pole caps
2.25 T with optional
50 mm (2 in) pole caps
1.20 T with standard
100 mm (4 in) pole caps
1.31 T with optional
50 mm (2 in) pole caps
Variable temperature field**
(50 mm [2 in] airgap)
0.89 T with standard
50 mm (2 in) pole caps
0.88 T with optional
100 mm (4 in) pole caps
0.63 T with standard
50 mm (2 in) pole caps
0.62 T with optional
100 mm (4 in) pole caps
1.45 T with standard
100 mm (4 in) pole caps
0.69 T with standard
100 mm (4 in) pole caps
Optional AC field frequency ranges NA 0.05 and 0.1 Hz  NA  0.05 and 0.1 Hz
Sample size Up to 10 mm × 10 mm × 3 mm standard,
up to 50 mm diameter × 3 mm optional
Up to 10 mm × 10 mm × 3 mm standard,
up to 50 mm diameter × 3 mm optional 
Standard module temperature Room temperature Room temperature  
Single point LN2 option temperature 77 K point  77 K point 
CCR option temperature 15 K to 400 K with standard CCR, 15 K to 350 K with optical CCR 15 K to 400 K with standard CCR, 15 K to 350 K with optical CCR
Oven option temperature Room temperature to 1,273 K;
at 773 K and ±1% rdg: maximum = 1 MΩ;
at 1,273 K and ±1% rdg: maximum = 1 kΩ
Room temperature to 1,273 K;
at 773 K and ±1% rdg: maximum = 1 MΩ;
at 1,273 K and ±1% rdg: maximum = 1 kΩ
Magnet  
Pole diameter 4 in 7 in
Pole cap diameter 50 mm (2 in) standard, 100 mm (4 in) optional 100 mm (4 in) standard, 50 mm (2 in) optional
Air gap at room temperature 25 mm (1 in) 25 mm (1 in)
Air gap with variable temperature options 50 mm (2 in) 50 mm (2 in)
Field uniformity

25 mm (1 in) air gap, 50 mm (2 in) pole caps: ±0.35% over 1 cm3 (0.4 in3)
25 mm (1 in) air gap, 100 mm (4 in) pole caps: ±0.05% over 1 cm3 (0.4 in3)
50 mm (2 in) air gap, 100 mm (4 in) pole caps: ±0.15% over 1 cm3 (0.4 in3)

25 mm (1 in) air gap, 50 mm (2 in) pole caps: ±0.35% over 1 cm3 (0.4 in3)
25 mm (1 in) air gap, 100 mm (4 in) pole caps: ±0.05% over 1 cm3 (0.4 in3)
50 mm (25 in) air gap, 100 mm (4 in) pole caps: ±0.15% over 1 cm3 (0.4 in3)
Cooling (magnet and power supply) 7.6 L/min (2 gal/min), 10.3 L/min (2.7 gal/min) with CCR option 19 L/min (5 gal/min), 23 L/min (6 gal/min) with CCR option  
3-phase bipolar magnet power supply  
Maximum output ±35 V ±70 A (2.5 kW) ±75 V ±135 A  (9.1 kW)
Utilities  
Total system cooling water power dissipation (50 or 60 Hz) — see list of available recirculating chillers 4.25 kW; 7.45 kW with optional CCR 13.4 kW; 16.6 kW with optional CCR


*Probe contact resistance may vary with sample
**All field values are nominal and can vary ±1%.

8400 Series Hardware

    T E M P E R A T U R E   O P T I O N S
  Standard room temperature Model 84015 77 K LN2 body option Model 84016
CCR option
Model 84017
oven option
Standard insert

Standard with system

Used together

- -
Standard body

Standard with system

- - -
Optical access body

84006, requires 84060

-

84016-O, requires 84060

-
Sample rotation

84010

84010

Standard with 84016

Standard with 84017

Sample mounting kit
Five 10 mm solder cards, one with PT sensor, wire and foil

Standard with system

840930

- -
Sample card kit
Five 10 mm solder cards

840931

840931

- -
Sample card kit
Five 10 mm solder cards with PT sensors

840932

840932

- -
10 mm prober pin sample card
with PT sensor

840910

840910

- -
50 mm prober pin sample card
with PT sensor

840911

- - -
Temperature monitoring

841-STM or 840-VTA*

841-STM or 840-VTA*

- -
Variable temperature - -

840-VTA

840-VTA

Pump

Not required

Not required

TPS-FRG or equivalent

E2M or equivalent
(or TPS-FRG)

Chiller for electromagnet

Consult Lake Shore

Not applicable

Consult Lake Shore

Not applicable

Floor mount hardware

840950

Not applicable

Not applicable

Not applicable

High uniformity

8404: EM4-4PB
8407: standard

8404: EM4-4PB
8407: standard

8404: EM4-4PB
8407: standard

8404: EM4-4PB
8407: standard

*If at some point you might add a variable temperature option to your HMS, 840-VTA or 841-STM should be chosen (841-STM can be upgraded to the Model 840-VTA)

8400 Series measurements

  Standard DC Model 84030 AC option
VdP Standard with system Can use with AC
Hall bar Standard with system Can use with AC
High resistance 84031 Can use with AC*
Gate bias 84032 Can use with AC
Low resistance 84033 -
 

= included

 

= Option available (model number)

 

= Option required (model number)

-

= Not compatible

*Limits maximum resistance to 8 GΩ