TITLE

A terraced scanning superconducting quantum interference device susceptometer with submicron pickup loops

AUTHOR(S)
Koshnick, Nicholas C.; Huber, Martin E.; Bert, Julie A.; Hicks, Clifford W.; Large, Jeff; Edwards, Hal; Moler, Kathryn A.
PUB. DATE
December 2008
SOURCE
Applied Physics Letters;12/15/2008, Vol. 93 Issue 24, p243101
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Superconducting quantum interference devices (SQUIDs) can have excellent spin sensitivity depending on their magnetic flux noise, pickup loop diameter, and distance from the sample. We report a family of scanning SQUID susceptometers with terraced tips that position the pickup loops 300 nm from the sample. The 600 nm–2 μm pickup loops, defined by focused ion beam, are integrated into a 12-layer optical lithography process allowing flux-locked feedback, in situ background subtraction and optimized flux noise. These features enable a sensitivity of ∼70 electron spins per root hertz at 4 K.
ACCESSION #
35922158

 

Related Articles

  • Response to “Comment on ‘Derivation of paleoclassical key hypothesis’ ” [Phys. Plasmas 15, 014703 (2008)]. Callen, J. D. // Physics of Plasmas;Jan2008, Vol. 15 Issue 1, p014704 

    The article presents the author's comments on the article "Derivation of paleoclassical key hypothesis," by J. D. Callena. It is stated that the important hypothesis of the paleoclassical model of radial electron heat transport is that electron guiding centers diffuse radially along with thin...

  • Coalescence of two magnetic flux ropes via collisional magnetic reconnection. Furno, Ivo; Intrator, Thomas P.; Hemsing, Erik W.; Hsu, Scott C.; Abbate, S.; Ricci, Paolo; Lapenta, Giovanni // Physics of Plasmas;May2005, Vol. 12 Issue 5, p055702 

    Quasi-two-dimensional coalescence of two parallel cylindrical flux ropes and the development of three-dimensional merged structures are observed and studied in the reconnection scaling experiment [Furno et al., Rev. Sci. Instrum. 74, 2324 (2003)]. These experiments were conducted in a...

  • On the Mechanism of Collective Action of a Flux of Solid Particles upon an Obstacle. Lin, É. É.; Mel’tsas, V. Yu.; Stadnik, A. L.; Yanilkin, Yu. V. // Technical Physics Letters;Sep2002, Vol. 28 Issue 9, p750 

    The results of two- and three-dimensional numerical calculations are presented for a steel ball penetrating (i) into a continuous aluminum plate and (ii) into a plate with a longitudinal channel modeling the state of a material resulting from interference of the unloading waves. The data confirm...

  • Filamentation instability in a quantum magnetized plasma. Bret, A. // Physics of Plasmas;Feb2008, Vol. 15 Issue 2, p022109 

    The filamentation instability occurring when a nonrelativistic electron beam passes through a quantum magnetized plasma is investigated by means of a cold quantum magnetohydrodynamic model. It is proved that the instability can be completely suppressed by quantum effects if and only if a finite...

  • Collisionless forced magnetic reconnection in an electron-positron plasma. Hosseinpour, M.; Vekstein, G. // Physics of Plasmas;Feb2008, Vol. 15 Issue 2, p022904 

    Collisionless forced magnetic reconnection in an electron-positron plasma, where the mechanism of the magnetic field breaking is inertia of plasma particles, is considered. The model under analytical investigation is the so-called Taylor problem: a tearing stable slab plasma equilibrium with a...

  • Drift-Alfvén vortices at the ion Larmor radius scale. Onishchenko, O. G.; Krasnoselskikh, V. V.; Pokhotelov, O. A. // Physics of Plasmas;Feb2008, Vol. 15 Issue 2, p022903 

    The theory of nonlinear drift-Alfvén waves with the spatial scales comparable to the ion Larmor radius is developed. It is shown that the set of equations describing the nonlinear dynamics of drift-Alfvén waves in a quasistationary regime admits a solution in the form of a solitary dipole...

  • Stable harmonic multiplying gyrotron traveling-wave amplifier with distributed wall losses and attenuating severs. Yeh, Y. S.; Cheng, J. H.; Chen, L. K.; Hung, C. W.; Lo, C. Y.; Liao, C. W. // Physics of Plasmas;Feb2008, Vol. 15 Issue 2, p023109 

    Harmonic multiplying gyrotron traveling-wave amplifiers (gyro-TWTs) provide magnetic field reduction and frequency multiplication. However, spurious oscillations may reduce the amplification of the gyro-TWT. Most distributed-loss structures are stabilized in gyro-TWTs that operate at low beam...

  • Confirmation of a large density variation along the magnetic axis of the Columbia Non-neutral Torus. Hahn, Michael; Pedersen, Thomas Sunn; Marksteiner, Quinn; Berkery, John W. // Physics of Plasmas;Feb2008, Vol. 15 Issue 2, p020701 

    Significant variations in the density and potential along the axis of a pure electron plasma in the Columbia Non-neutral Torus (CNT) stellarator have now been measured. Large variations along the magnetic field are predicted by three-dimensional equilibrium reconstructions of CNT plasmas and by...

  • Effect of applied magnetic field on a microwave plasma thruster. Juan Yang; Yingqiao Xu; Zhiqiang Meng; Tielian Yang // Physics of Plasmas;Feb2008, Vol. 15 Issue 2, p023503 

    Theoretical analysis and calculation show that applying a magnetic field in a microwave plasma thruster operating at 2.45 GHz can improve the thruster performance, whereby an electron cyclotron resonant layer at thruster startup state contributes to the increase of microwave energy dissipated in...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics