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Title: | Advancing precision in Hall effect through localized heating with a compact design |
Authors: | KEDIA, DINESH KUMAR JAKHAR, NAVITA SINGH, SURJEET Dept. of Physics |
Keywords: | Hall effect Electrical conductivity Precision measurements Semimetals Semiconductor crystals Thermoelectric effects Thermoelectric materials Metals 2025-MAR-WEEK4 TOC-MAR-2025 2025 |
Issue Date: | Mar-2025 |
Publisher: | AIP Publishing |
Citation: | Review of Scientific Instruments, 96(03). |
Abstract: | We have developed a versatile, fully automated Hall measurement setup for operations between room temperature and 750 K and in magnetic fields up to ±10 kOe. Our compact sample holder design with localized heating and minimal heat losses enables precise temperature stability (better than ±10 mK at 750 K) and low power consumption (20–25 W). The setup is housed within a 26 mm air gap between the pole pieces of an electromagnet. The sample holder, enclosed in a quartz tube for a controlled atmosphere, can accommodate various sample shapes and sizes, which can be contacted using adjustable pressure-point contacts. Despite its compact size, bulk thermoelectric samples measuring up to 10 mm laterally can be analyzed successfully. A phase-sensitive lock-in technique and electromagnetic shielding ensure excellent sensitivity, allowing nanovolt Hall signal measurements in high-carrier-concentration samples. We have successfully applied this setup to diverse materials, including a lightly doped germanium (1014 cm−3), degenerate semiconductors from the half-Heusler family (1021 cm−3), and superionic thermoelectrics (1018 cm−3), demonstrating its versatility and reliability. Our results align well with those from commercial systems where available. |
URI: | https://doi.org/10.1063/5.0240792 http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/9434 |
ISSN: | 0034-6748 1089-7623 |
Appears in Collections: | JOURNAL ARTICLES |
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