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Electrochemical Techniques
Superconducting Quantum Interference Device (SQUID)
Superconducting Quantum Interference Device (SQUID) is an ultra-sensitive magnetometer renowned for its ability to detect extremely small magnetic fields with high precision. It operates on the principles of quantum interference within superconducting loops, making it invaluable in various scientific and industrial applications.
SQUID operates based on the principle of quantum interference in superconducting loops. It consists of a superconducting ring interrupted by two Josephson junctions. When exposed to a magnetic field, the SQUID’s superconducting state is modulated, allowing it to detect and measure magnetic flux changes with exceptional sensitivity.
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- Materials Science: Analyzing magnetic properties of superconductors, nanoparticles, and thin films.
- Geophysics: Studying Earth’s magnetic fields and geological structures.
- Biophysics: Measuring weak magnetic fields in biological systems, such as brain activity (MEG).
- Quality Control: Assessing magnetic properties in manufacturing processes, including magnetic storage media.
- High Sensitivity
- Wide Frequency Range
- Non-Invasive Measurements
- Potential for Quantum Information Processing
- Quantitative and Direct Measurement
- Samples should be magnetically responsive, such as magnetic nanoparticles, thin films, or biological tissues emitting biomagnetic signals.
- Sample size: 9 mm.
- Powder sample: 5 mg to 20 mg
- Solid sample:
- a) 2 mm x 2 mm x 2 mm pellet or thin film form (Perpendicular)
- b) 1 mm x 3 mm x 3 mm or 1 mm x 3 mm x 4 mm pellet or thin film form (Parallel)