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8400 Series Hall effect system specifications

8404

8407

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

Resistivity

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.

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.

Current

±1 pA to ±100 mA

Compliance voltage

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

2.08 T with standard
100 mm (4 in) pole caps
2.23 T with optional
50 mm (2 in) pole caps

1.19 T with standard
100 mm (4 in) pole caps
1.30 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

1.44 T with standard
100 mm (4 in) pole caps

0.68 T with standard
100 mm (4 in) pole caps

Optional AC field frequency ranges

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

Standard module temperature

Room temperature

Single point LN₂ option temperature

77 K point

CCR option temperature

10 K (DC field)/15 K (AC field) to 400 K with standard CCR; 10 K (DC field)/15 K (AC field) 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

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)

Air gap with variable temperature options

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 cm ³ (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

*Limits maximum resistance to 8 GΩ

	= included
	= Option available (model number)
	= Option required (model number)
	= Not compatible