Spin Dependent Tunneling Magnetic Field Sensors for Clutter-Limited Detection

Award Information
Agency:
Department of Defense
Branch
Defense Advanced Research Projects Agency
Amount:
$98,988.00
Award Year:
2001
Program:
SBIR
Phase:
Phase I
Contract:
DAAH0102CR042
Agency Tracking Number:
01SB2-0154
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
NVE CORP. (FORMERLY NONVOLATILE ELECTRON
11409 Valley View Road, Eden Prairie, MN, 55344
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
114264351
Principal Investigator:
Mark Tondra
Magnetician
(952) 996-1615
markt@nve.com
Business Contact:
James Daughton
Chief Technical Officer
(952) 996-1607
daughton@nve.com
Research Institution:
n/a
Abstract
Highly sensitive, low power, rugged, and compact sensors are required for many military applications. Spin Dependent Tunneling (SDT) devices have been fabricated into magnetic field sensors that perform well, and have the lowest effective noise floor ofany magnetoresistive sensor at high frequencies. Next generation devices, whose noise floor should approach 1 picoTesla / root Hz at 1 Hz, have the potential to meet all of the requirements for the application specified in this solicitation. Additionalwork is required beyond achieving basic sensitivity levels. In particular, algorithms and devices must be developed to permit several of these devices to function as a set of long-baseline gradiometers in a remote setting. This proposed Phase I SBIReffort will address these requirements. A matched field processing approach will be examined as a mode of operating in the field. Several techniques for magnetic field self-calibration and orientation will be studied. These include using the ambientearth's field and geomagnetic noise as calibration sources, and generating calibration fields using the magnetometers themselves. A low power SDT sensor will be made and tested. A successful Phase II project would add electric field measurements, power,and communications hardware to the basic SDT transducers. SDT magnetic field sensors fill a need for a wide range of commercial applications. High impedance, and high sensitivity, wide bandwidth, small size and low power give them significant advantagesin the marketplace. Applications include vehicle detection, currency detection, defect detection using eddy currents, buried object classification, and geophysical analysis.

* information listed above is at the time of submission.

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