Development of a magnetoelastic resonant sensor using iron-rich, nonzero magnetostrictive amorphous alloys
- Massachusetts Inst. of Tech., Cambridge, MA (United States)
A novel type of a magnetoelastic sensor which is based on the concept of the coupled magneto-mechanical resonance is described. Magnetic excitation of the tag results in some energy being stored in an elastic mode, much as in a tuning fork. When the magnetic excitation is turned off, the elastic energy sustains the magnetic oscillation through an exponentially decaying ring-down period that is a unique signature of the tag. This unique signal can be utilized principally as a sensor in electronic article surveillance. The goal of this investigation is to determine the relationships between processing parameters and the magnetic properties of the tag. The emphasis is placed on the operating principles of the sensor and special challenges in magnetic domain engineering and magnetic processing to optimize the sensor. The material requirement here is a magnetically soft material having nonzero magnetostriction.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 417877
- Journal Information:
- Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science, Vol. 27, Issue 10; Other Information: PBD: Oct 1996
- Country of Publication:
- United States
- Language:
- English
Similar Records
Fully coupled, dynamic model of a magnetostrictive amorphous ribbon and its validation
Electrodeposition processes for magnetostrictive resonators