Hysteretic behaviour of nanoSQUIDs—prospective application as trapped-vortex memory

Lam, Siu Shu Eddie; Gnanarajan, S.

doi:10.1088/0953-2048/22/6/064005

Cited by 6 publications

(2 citation statements)

References 29 publications

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“…In fact, to avoid the entry of vortices or their activated thermally motion, careful designs of the device has to be take into consideration. However, single vortex at localized trapping site can be used as a memory bit as proposed in the late '70s [280]. In the early '80s, Uehara and Nagata [281] investigated a memory cell based on multiple trapped vortices in superconducting thin film.…”

Section: Nanoelectronics and Quantum Computingmentioning

confidence: 99%

Nano Superconducting Quantum Interference device: A powerful tool for nanoscale investigations

2016

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The magnetic sensing at nanoscale level is a promising and interesting research topic of nanoscience. Indeed, magnetic imaging is a powerful tool for probing biological, chemical and physical systems. The study of small spin cluster, like magnetic molecules and nanoparticles, single electron, cold atom clouds, is one of the most stimulating challenges of applied and basic research of the next years. In particular, the magnetic nanoparticle investigation plays a fundamental role for the modern material science and its relative technological applications like ferrofluids, magnetic refrigeration and biomedical applications, including drug delivery, hyper-thermia cancer treatment and magnetic resonance imaging contrast-agent. Actually, one of the most ambitious goals of the high sensitivity magnetometry is the detection of elementary magnetic moment or spin. In this framework, several efforts have been devoted to the development of a high sensitivity magnetic nanosensor pushing sensing capability to the individual spin level. Among the different magnetic sensors, Superconducting QUantum Interference Devices (SQUIDs) exhibit an ultra high sensitivity and are widely employed in numerous applications. Basically, a SQUID consists of a superconducting ring (sensitive area) interrupted by two Josephson junctions. In the recent years, it has been proved that the magnetic response of nano-objects can be effectively measured by using a SQUID with a very small sensitive area (nanoSQUID). In fact, the sensor noise, expressed in terms of the elementary magnetic moment (spin or Bohr magneton), is linearly dependent on the SQUID loop side length. For this reason, SQUIDs have been progressively miniaturized in order to improve the sensitivity up to few spin per unit of bandwidth. With respect to other techniques, nanoSQUIDs offer the advantage of direct measurement of magnetization changes in small spin systems. In this

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Section: Nanoelectronics and Quantum Computingmentioning

confidence: 99%

Nano Superconducting Quantum Interference device: A powerful tool for nanoscale investigations

2016

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“…The gate tunability of the CNT junctions enhances the sensitivity of the device which can in principle detect the spin of a single molecule. In this issue, Lam [32] also discusses the use of a nanoSQUID as a memory device.…”

Section: Nanoelectronics Including Memorymentioning

confidence: 99%