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Three-Axis Vector Nano Superconducting Quantum Interference Device
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DOI：10.1021/acsnano.6b02218.png)
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Abstract
En 中文
We present the design, realization, and performance of a three-axis vector nano superconducting quantum interference device (nanoSQUID). It consists of three mutually orthogonal SQUID nanoloops that allow distinguishing the three components of the vector magnetic moment of individual nanoparticles placed at a specific position. The device is based on Nb/HfTi/Nb Josephson junctions and exhibits line-widths of similar to 250 nm and inner loop areas of 600 x 90 and 500 x 500 nm(2). Operation at temperature T = 4.2 K under external magnetic fields perpendicular to the substrate plane up to similar to 50 mT is demonstrated. The experimental flux noise below similar to 250 n Phi(0)/root Hz in the white noise limit and the reduced dimensions lead to a total calculated spin sensitivity of similar to 630 mu(B)/root Hz and similar to 70 mu(B)/root Hz for the in-plane and out-of-plane components of the vector magnetic moment, respectively. The potential of the device for studying three-dimensional properties of individual nanomagnets is discussed.
Keywords:
nanoSQUID
superconductivity
nanofabrication
magnetic particle detection
three-axis magnetometry
Journal
IF:
16
Papers:
2.6W
Citations:
25.6W
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