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Magnetoresistance measurements<br />
50<br />
40<br />
5 K<br />
25 mV<br />
a<br />
V (mV)<br />
0 100 200 300 400 500<br />
b<br />
MC (%)<br />
30<br />
20<br />
10<br />
25 mV<br />
5 K<br />
0<br />
-150 -100 -50 0 50 100 150<br />
B (mT)<br />
0 20 40 60 80 100 120<br />
T (K)<br />
Varying external B field, change relative spin orientation,<br />
important change in resistance<br />
L. E. Hueso et al, Nature 2007