AC Hall Measurement Micro Probe System

The AC Hall Measurement Micro Probe System (ACHS) combines Nextron’s compact probe platform with AC Hall measurement technology, providing an integrated platform for characterizing electrical transport properties. By applying an alternating magnetic field and lock-in amplifier-based phasesensitive detection, the ACHS enables sensitive detection of small Hall signals while reducing the effects of DC offset and background noise, making it particularly suitable for low-mobility or high-resistance materials. Combined with Nextron’s environmental control technology, the ACHS enables Hall measurements under a wide range of temperature, vacuum, and gas conditions.

Min. air gap	29 mm
Magnet Type	N52 Neodymium2)
Motorized Magnetic Rotation Speed	Adjustable
Selectable Sample Contact Types	Manual Probe / Motorized Probe / Wire Connection
Number of Probes (or Pins)	4 or 6
Temperature ranges	ACHS-CH RT to 1000°C
	ACHS-PT -40 to 200°C
	ACHS-LN 80K to RT
Sample Stage Dimension	ACHS-CH Ø 12.7 mm
	ACHS-PT 19 × 19 mm
	ACHS-LN 20 × 20 mm
Chamber External Dimension (excluding ports) (W × D × H)1)	117 × 80 × 25 mm
System Dimensions (W × D × H)1)	ACHS-CH / ACHS-PT 250 × 320 × 380 mm
	ACHS-LN 420 × 320 × 380 mm
Environmental control	Vacuum tight < 1 × 10-4 mbar
	Humidity control option 4 - 95 %RH
	Vacuum partial pressure control option 0.001 - 1300 mbar
	MFC Gas control option
Signal port	SMA (SMA to BNC cable included)
Vacuum & gas port	1/4 in. & 3/8 in. tube fitting (Swagelok®-type)
Field Monitoring	Resolution1 G
Electrical characteristics	Leakage Current 100pA / 100 fA
	Maximum DC Voltage, Current 300 VDC, 1000 mA
	Frequency DC – 300 MHz

¹⁾ Specifications may vary depending on the temperature range, sample contact type, magnet type, vacuum configuration,
and sample size
²⁾ For the ACHS-LN model with Wire Connection type.

(Unit: mm)

Side View