Development of thin wire platinum resistance thermometer with isotropic magnetoresistance
✍ Scribed by K. Nara; H. Kato; M. Okaji
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 635 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0011-2275
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✦ Synopsis
A thin wire platinum resistance thermometer with isotropic magnetoresistance is developed by adjusting the pitch angle O R in the winding of the sensing wire to a specified 'magic' angle. The anisotropy between 20 and 70 K under magnetic fields of up to 8 T is smaller than 1%, compared with 35% for typical commercially available platinum resistance thermometers. The angular dependence of the magnetoresistance of the wire element used in the sensor is also measured between 6 and 40 K under magnetic fields of up to 8 T, to determine an optimized design of the sensor. A correction function with three temperature-independent fitting parameters is determined for the present sensors with an accuracy of 60 mK between 20 and 100 K under magnetic fields of up to 8 T.