Three-Axis Vector Nano Superconducting Quantum Interference Device
Three-Axis Vector Nano Superconducting Quantum Interference Device
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DOI：
10.1021/acsnano.6b02218
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发表时间：
2016-09-01
期刊：
影响因子：
17.1
通讯作者：
Koelle, Dieter
中科院分区：
文献类型：
--
作者：
Martinez-Perez, Maria Jose;Gella, Diego;Koelle, Dieter
介绍了一种三轴矢量纳米超导量子干涉仪（nanoSQUID）的设计、实现和性能。它由三个相互正交的SQUID纳米环组成，可以区分放置在特定位置的单个纳米颗粒的矢量磁矩的三个分量。该器件基于Nb/HfTi/Nb约瑟夫森结，线宽约为250 nm，内环面积为600 x 90和500 x 500 nm（2）。操作温度T = 4.2 K下的外部磁场垂直于衬底平面高达50 mT的类似证明。在白色噪声极限下，实验磁通噪声低于250 n Phi（0）/root Hz，并且减小的尺寸导致矢量磁矩的面内和面外分量的总计算自旋灵敏度分别为630 mu（B）/root Hz和70 mu（B）/root Hz。潜在的研究个别纳米磁体的三维特性的设备进行了讨论。
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.