| | 7704A | 7707A | 7710A | 9709A |
| Magnetic field | Please consult
Lake Shore for
10 in magnet option information | |
| Room temp | ±1.3 T | ±2 T | ±9 T |
| Variable temp | ±0.87 T | ±1.2 T | ±9 T |
| Temperature | |
| Standard | 77 K or room temperature | 2 K to 400 K |
| CCR | 15 K to 350 K | NA |
| Oven | 350 K to 800 K | NA |
| Carrier concentration density | 8 × 102 to 8 × 1023 cm-3 | 8 × 102 to 8 × 1023 cm-3 |
| Mobility | 1 to 1 × 106 cm2/V s | 1 to 1 × 106 cm2/V s |
| Current (A) | ±1 pA to ±100 mA | ±1 pA to ±100 mA |
| Voltage (V) | 0 V to 100 V | 0 V to 100 V |
| Resistance range (standard) | 2% accuracy—VdP minimum: 0.5 mΩ,
HB minimum: 0.8 mΩ, maximum: 100 GΩ
5% accuracy—VdP minimum: 0.1 mΩ,
HB minimum: 0.04 mΩ, maximum: 200 GΩ | 2% accuracy—VdP minimum: 0.5 mΩ, HB minimum: 0.8 mΩ, maximum: 100 GΩ
5% accuracy—VdP minimum: 0.1 mΩ, HB minimum: 0.04 mΩ, maximum: 200 GΩ |
| System equipment | |
| Sample holder module | 75013 room temperature/77 K; 1-sided sample cards | 9500-SI; 1-sided sample cards |
| Sample holder kit (included with sample holder module) | (1) 750SC10-50, (1) 750SC50-10, (1) 671-205, (1) 671-260, (1) 671-250, and (10) 1-inch sheets of indium foil | Integrated into 9500-SI |
| Sample size | Up to 10 × 14 mm (0.4 × 0.6 in) on a 25 × 75 mm (1 × 3 in) card; up to 60 mm (2.4 in) square on an 82 × 93 mm (3.2 × 3.7 in) card | Up to 76 mm (3 in) in diameter | 12 × 14 mm (0.5 × 0.6 in) in a 25.4 mm (1 in) bore |
| Number of samples | 1 | 1 |
| Model 475 gaussmeter | 1 | NA |
| Model 776 matrix | 1 | 1 |
| Keithley equipment | |
| 6220 Current Source | 1 | 1 |
| 6485 Autoranging Digital Picoammeter | 1 | 1 |
| 2182A Digital Voltmeter | 1 | 1 |
| Magnet | EM4-HVA | EM7-HV | Superconducting |
| Pole diameter | 102 mm (4 in) | 178 mm (7 in) | NA |
| Pole face diameter | 102 mm (4 in) | 152 mm (6 in) | 76.2 mm (3 in) | NA |
| Maximum magnetic field at room temperature | 1.3 T (13 kG) at 25 mm (1 in) air gap | 1.6 T (16 kG) at 25 mm (1 in) air gap | 2.17 T (21.7 kG) at 25 mm (1 in) air gap | 9 T |
| Maximum magnetic field at variable temperature | 0.87 T (8.7 kG) at 51 mm (2 in) air gap | 1.18 T (11.8 kG) at 51 mm (2 in) air gap | 1.47 T (14.7 kG) at 51 mm (2 in) air gap | 9 T |
| Field homogeneity | ±0.1% over 10 mm3 (0.4 in3) | ±0.1% over centered 51 mm (2 in) diameter circle | ±0.1% over 60 mm (2.3 in) on axis |
| Cooling water requirements | Tap water or closed cycle cooling system (optional chiller available) | Liquid helium |
| Inlet temperature | 25 °C (77 °F) maximum | 32 °C (90 °F) maximum | NA |
| Pressure drop | 200 kPa (30 psi) | 220 kPa (32 psi) | NA |
| Flow rate | 7.6 L (2 gal)/min | 11.4 L (3 gal)/min | NA |
| Water chiller cooling capacity | 2.5 kW (8,530 BTU)/h | 5 kW (17,060 BTU)/h | NA |
| Bipolar magnet power supply | 643 | 648 | 625 |
| Mode | DC | DC |
| Maximum output | ±35 V ±70 A (2450 W) | ±75 V ±135 A (9.1 kW nominal) | ±5 V/±60 A (300 W) |
| AC line input | 204/208 VAC ±10%, 13 A/phase; 220/230 VAC ±10%, 12 A/phase; 380 VAC ±10%, 7 A/phase; 400/415 VAC ±10%, 6.5 A/phase at 50/60 Hz | 200 VAC ±10%, 41 A/phase;
208 VAC ±10%, 40 A/phase;
220 VAC ±10%, 38 A/phase;
230 VAC ±10%, 37 A/phase;
380 VAC ±10%, 23 A/phase;
400 VAC ±10%, 21 A/phase;
415 VAC ±10%, 21 A/phase | Single phase 100, 120, 220, 240 VAC +6% -10%, 50 or 60 Hz, 850 VA |
| Flow rate | 5.7 L (1.5 gal)/min minimum | 7.6 L (2 gal)/min | NA |
| Cooling water requirements | Tap water or closed cycle cooling system (optional chiller available) +15 °C to +30 °C | Tap water or closed cooling system (optional chiller available) +15 °C to +30 °C | Air cooled |
| Computer | Dell® computer with HDD, CD-ROM, 19-inch SVGA flat screen monitor, Windows® OS, Hall software, and National Instruments IEEE-488 USB adapter |