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Low Magnetic Field Detection Using a CuPt Nano Structure Made on a SiO(2)/Si Structure
Hassan Hajghassem1, Seyedeh Maryam Banihashemian, Majidreza Aliahmadi
1Electrical Engineering Department Shahid Beheshti University, Tehran, Iran.
Sensors (Basel, Switzerland)
|February 4, 2012
Summary
This study introduces a novel silicon/silicon dioxide/copper platinum (Si/SiO(2)/CuPt) structure for detecting low magnetic fields. The nano-structured material demonstrates high sensitivity, making it suitable for advanced magnetic field sensors.
Area of Science:
- Materials Science
- Nanotechnology
- Condensed Matter Physics
Background:
- Development of sensitive magnetic field detectors is crucial for various technological applications.
- Existing sensors often face limitations in sensitivity, cost, or size.
Purpose of the Study:
- To fabricate and characterize a novel Si/SiO(2)/CuPt heterostructure for magnetic field sensing.
- To investigate the sensitivity and operational characteristics of the developed structure.
Main Methods:
- Fabrication of the Si/SiO(2)/CuPt structure using electron beam evaporation.
- Characterization using Scanning Electron Microscopy (SEM) to determine nano cluster size.
- Electrical measurements (I-V and I-B) to assess magnetic field sensitivity at 77K.
Main Results:
- Formation of CuPt nano clusters with average sizes below 100 nm.
- High sensitivity to magnetic fields, detecting fields as low as 6 mT.
- Observed oscillatory current behavior with varying magnetic field strength.
- Sensitivity attributed to nano-scale platinum-copper structures, discrete energy states, and carrier tunneling.
Conclusions:
- The Si/SiO(2)/CuPt structure exhibits promising performance for low magnetic field detection.
- The material's sensitivity is linked to its unique nanostructure and quantum properties.
- This structure represents a potential candidate for developing small, cost-effective, and highly sensitive magnetic field sensors.
