Sub-100-nm negative bend resistance ballistic sensors for high spatial resolution magnetic field detection.
نویسندگان
چکیده
We report the magnetic field detection properties of ballistic sensors utilizing the negative bend resistance of InSb∕In(1-x)Al(x)Sb quantum well cross junctions as a function of temperature and geometric size. We demonstrate that the maximum responsivity to magnetic field and its linearity increase as the critical device dimension is reduced. This observation deviates from the predictions of the classical billiard ball model unless significant diffuse boundary scattering is included. The smallest device studied has an active sensor area of 35×35 nm(2), with a maximum responsivity of 20 kΩ∕T, and a noise-equivalent field of 0.87μT∕Hz at 100 K.
منابع مشابه
Ultrasensitive Magnetic Nanoparticle Detector for Biosensor Applications
Ta/Ru/Co/Ru/Co/Cu/Co/Ni80Fe20/Ta spin-valve giant magnetoresistive (GMR) multilayers were deposited using UHV magnetron sputtering and optimized to achieve a 13% GMR ratio before patterning. The GMR multilayer was patterned into 12 sensor arrays using a combination of e-beam and optical lithographies. Arrays were constructed with 400 nm × 400 nm and 400 nm × 200 nm sensors for the detection of ...
متن کاملUltra-Compact 100 × 100 μm2 Footprint Hybrid Device with Spin-Valve Nanosensors
Magnetic field mapping with micrometric spatial resolution and high sensitivity is a challenging application, and the technological solutions are usually based on large area devices integrating discrete magnetic flux guide elements. In this work we demonstrate a high performance hybrid device with improved field sensitivity levels and small footprint, consisting of a ultra-compact 2D design whe...
متن کاملTheoretical calculation of magneto-transport properties in semiconductor devices and comparison to experimental data
Negative bend resistance is a signature of ballistic transport in low-dimension semiconductor devices. We calculate the bend resistance in 4-terminal devices using R-matrix theory. R-matrix theory is a technique first introduced in nuclear physics and recently shown to be a useful tool for calculating transport properties of solid-state devices. We have improved upon the existing implementation...
متن کاملSpatial detection of ferromagnetic wires using GMR sensor and based on shape induced anisotropy
The purpose of this paper is to introduce a new technique for row spacing measurement in a wire array using giant magnetoresistive (GMR) sensor. The self-rectifying property of the GMR-based probes leads to accurately detection of the magnetic field fluctuations caused by surface-breaking cracks in conductive materials, shape-induced magnetic anisotropy, etc. The ability to manufacture probes h...
متن کاملIntroducing An Efficient Set of High Spatial Resolution Images of Urban Areas to Evaluate Building Detection Algorithms
The present work aims to introduce an efficient set of high spatial resolution (HSR) images in order to more fairly evaluate building detection algorithms. The introduced images are chosen from two recent HSR sensors (QuickBird and GeoEye-1) and based on several challenges of urban areas encountered in building detection such as diversity in building density, building dissociation, building sha...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Applied physics letters
دوره 98 6 شماره
صفحات -
تاریخ انتشار 2011