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Abstract .................................................... 2

Contents .................................................... 3

1. Introduction ............................................. 4

2. Experimental details ..................................... 5

2.1 Fabrication ............................................. 5

2.2 Chip layout ............................................. 5

2.3 Measurement techniques .................................. 7

3. Results .................................................. 8

3.1 Threshold voltage ....................................... 8

3.1.1 Magnetic field dependence ............................. 9

3.1.2 Starting voltage, Vs ..................................12

3.1.3 Temperature dependence ................................13

3.1.4 Frequency dependence ..................................13

3.2 Zero bias resistance ....................................15

3.3 Current-voltage characteristics .........................16

4. Conclusions ..............................................18

References ..................................................18

Acknowledgments .............................................18

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