Conferences related to Critical current density

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2021 IEEE Photovoltaic Specialists Conference (PVSC)

Photovoltaic materials, devices, systems and related science and technology


2020 IEEE 70th Electronic Components and Technology Conference (ECTC)

ECTC is the premier international conference sponsored by the IEEE Components, Packaging and Manufacturing Society. ECTC paper comprise a wide spectrum of topics, including 3D packaging, electronic components, materials, assembly, interconnections, device and system packaging, optoelectronics, reliability, and simulation.


2020 Joint Conference of the IEEE International Frequency Control Symposium and International Symposium on Applications of Ferroelectrics (IFCS-ISAF)

Ferroelectric materials and applications


2020 IEEE Power & Energy Society General Meeting (PESGM)

The Annual IEEE PES General Meeting will bring together over 2900 attendees for technical sessions, administrative sessions, super sessions, poster sessions, student programs, awards ceremonies, committee meetings, tutorials and more


2020 IEEE International Conference on Plasma Science (ICOPS)

IEEE International Conference on Plasma Science (ICOPS) is an annual conference coordinated by the Plasma Science and Application Committee (PSAC) of the IEEE Nuclear & Plasma Sciences Society.



Periodicals related to Critical current density

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Applied Superconductivity, IEEE Transactions on

Contains articles on the applications and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Power applications include magnet design as well asmotors, generators, and power transmission


Audio, Speech, and Language Processing, IEEE Transactions on

Speech analysis, synthesis, coding speech recognition, speaker recognition, language modeling, speech production and perception, speech enhancement. In audio, transducers, room acoustics, active sound control, human audition, analysis/synthesis/coding of music, and consumer audio. (8) (IEEE Guide for Authors) The scope for the proposed transactions includes SPEECH PROCESSING - Transmission and storage of Speech signals; speech coding; speech enhancement and noise reduction; ...


Circuits and Systems II: Express Briefs, IEEE Transactions on

Part I will now contain regular papers focusing on all matters related to fundamental theory, applications, analog and digital signal processing. Part II will report on the latest significant results across all of these topic areas.


Device and Materials Reliability, IEEE Transactions on

Provides leading edge information that is critical to the creation of reliable electronic devices and materials, and a focus for interdisciplinary communication in the state of the art of reliability of electronic devices, and the materials used in their manufacture. It focuses on the reliability of electronic, optical, and magnetic devices, and microsystems; the materials and processes used in the ...


Dielectrics and Electrical Insulation, IEEE Transactions on

Electrical insulation common to the design and construction of components and equipment for use in electric and electronic circuits and distribution systems at all frequencies.



Most published Xplore authors for Critical current density

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Xplore Articles related to Critical current density

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Superconducting cylinder in a static transverse magnetic field

IEEE Transactions on Applied Superconductivity, 1997

A piecewise continuous distribution of the critical currents is proposed to make compatible the Maxwell equations and constitutive equations of superconducting media. A magnetic moment of the infinite superconducting cylinder is calculated on the base of the proposed shell model. Some generalizations of the calculation method are given for superconductors of more complicated shapes.


Intrinsic critical current densities in YBCO superconducting film

1992 IEEE International Magnetics Conference (INTERMAG), 1992

None


The RF performance of long junction active devices using TlCaBaCuO step edge structures

IEEE Transactions on Applied Superconductivity, 1992

The authors report the fabrication of long, step-edge junctions using TlCaBaCuO with associated control lines that demonstrate strong modulation of critical current, usable current gains, large power gains, and fairly large bandwidths. The devices are operational at up to 95 K and RF measurements have been made at 77 K at frequencies up to a probe-limited 10 GHz. These four ...


High-T/sub c/ Superconducting Magnets Based On Screen Printed Layer Arrangements

1993 IEEE International Magnetics Conference (INTERMAG), 1993

None


Influence of the Demagnetizing Field in Spin Dynamics With a Perpendicular-to-Plane Polarizer

IEEE Transactions on Magnetics, 2008

The authors derive an analytical form of the critical current density for the gyromagnetic precession in spin-transfer torque (STT) devices. The STT device which is injected by a perpendicular-to-plane polarized current has very different properties. We find that the critical current needed to generate a large cone-angle precession motion depends on the Gilbert damping constant, in-plane anisotropy field, stray field, ...



Educational Resources on Critical current density

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IEEE.tv Videos

Materials Challenges for Next-Generation, High-Density Magnetic Recording - Kazuhiro Hono: IEEE Magnetics Distinguished Lecture 2016
Unconventional Superconductivity: From History to Mystery
AlGaN/GaN Plasmonic Terahertz Detectors
Molecular Cellular Networks: A Non von Neumann Architecture for Molecular Electronics - Craig Lent: 2016 International Conference on Rebooting Computing
Neural Processor Design Enabled by Memristor Technology - Hai Li: 2016 International Conference on Rebooting Computing
Patrizio Vinciarelli, Newell Award: APEC 2019
Stochastic Single Flux Quantum Neuromorphic Computing using Magnetically Tunable Josephson Junctions - Stephen Russek: 2016 International Conference on Rebooting Computing
Leading Through Crisis - IEEE WIE ILC 2020 Virtual Series
KeyTalks: Mission Critical Power
IEEE Standards University
IEEE Tesla and Halperin Awards: PES Awards 2020
Superconductive Energy-Efficient Computing - ASC-2014 Plenary-series - 6 of 13 - Wednesday 2014/8/13
Advances in MgB2 - ASC-2014 Plenary series - 7 of 13 - Wednesday 2014/8/13
International Future Energy Challenge (IFEC) 2017
Brooklyn 5G Summit: Critical Modeling Aspects and Their Effect on System Design and Performance
ITEC 2014: Urban Mass Transit Systems: Current Status and Future Trends
International Future Energy Challenge 2018
Why Conferences Matter
Innovative Mechanical Systems to Address Current Robotics Challenges
IEEE PES Awards 2020: IEEE PES Uno Lamm High Voltage Direct Current Award

IEEE-USA E-Books

  • Superconducting cylinder in a static transverse magnetic field

    A piecewise continuous distribution of the critical currents is proposed to make compatible the Maxwell equations and constitutive equations of superconducting media. A magnetic moment of the infinite superconducting cylinder is calculated on the base of the proposed shell model. Some generalizations of the calculation method are given for superconductors of more complicated shapes.

  • Intrinsic critical current densities in YBCO superconducting film

    None

  • The RF performance of long junction active devices using TlCaBaCuO step edge structures

    The authors report the fabrication of long, step-edge junctions using TlCaBaCuO with associated control lines that demonstrate strong modulation of critical current, usable current gains, large power gains, and fairly large bandwidths. The devices are operational at up to 95 K and RF measurements have been made at 77 K at frequencies up to a probe-limited 10 GHz. These four terminal devices have output impedances of 2-20 Omega , small signal current gains greater than 2.5, available power gains of over 10 dB from 0.5 to 10 GHz, and minimum noise figures of less than 1 dB.<<ETX>>

  • High-T/sub c/ Superconducting Magnets Based On Screen Printed Layer Arrangements

    None

  • Influence of the Demagnetizing Field in Spin Dynamics With a Perpendicular-to-Plane Polarizer

    The authors derive an analytical form of the critical current density for the gyromagnetic precession in spin-transfer torque (STT) devices. The STT device which is injected by a perpendicular-to-plane polarized current has very different properties. We find that the critical current needed to generate a large cone-angle precession motion depends on the Gilbert damping constant, in-plane anisotropy field, stray field, and demagnetizing filed. Compared to the most used STT device, which is injected by a current with in-plane spin polarization, the critical current is always smaller.

  • Critical current characteristics in high T/sub c/ superconductors

    Critical-current densities of superconducting oxides are theoretically estimated for single-crystalline thin films and polycrystalline bulk materials with oriented and random textures. The percolation theory is used, and the effect of depression of the transport current through grain boundaries is taken into account. The results are compared in detail to previously published experimental results.<<ETX>>

  • Study on relation between AC characteristics and critical current distribution in YBCO tape

    We measured AC transport current loss of a high current density YBCO tape conductor. The tape conductor was made by depositing YBCO thin layer of /spl sim/1 /spl mu/m thick on a LaAlO/sub 3/ single crystal substrate and its critical current was around 100 A at 0 T and 77 K. The loss data deviated from the Norris curves for the elliptical and strip models. We made an analytical model to numerically calculate the AC transport current loss. In the model, critical current density (J/sub c/) distribution in the wire cross section is taken into consideration. It is shown by the analysis based on the model that the deviation of the measured AC loss from the Norris equations is due to inhomogeneous J/sub c/ distribution in the cross section of the tape. The J/sub c/ distribution was investigated by subdividing the YBCO layer along the longitudinal direction. The results of the investigation are compared with the J/sub c/ distribution deduced from the analysis. The loss data showed frequency dependency, which can be explained by assuming that the loss has hysteretic and eddy-current-like loss components.

  • Temperature dependence of the intragrain critical current density in polycrystalline Ag-sheathed Bi(2223) tapes

    The temperature dependence of the intrinsic (Bi,Pb)/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub 10/ current density has been evaluated inside Ag sheathed tapes. By comparing transport and magnetic measurements performed on multifilamentary (Bi,Pb)/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub 10/ tapes, we individuate a domain of the H-T plane where the current density is limited by the quality of the boundaries between neighboring grains and the tape behaves as a granular superconductor and, on the contrary, the domain where it behaves like a single crystal. At temperatures below 30 K in absence of applied fields, we find that the intragrain current density is about an order of magnitude larger than the transport current density.

  • Flux pinning in neutron irradiated YBa/sub 2/Cu/sub 3/O/sub 7-x/

    Identical polycrystalline samples of YBa/sub 2/Cu/sub 3/O/sub 7-x/ have been irradiated with fast neutrons (E>0.1 MeV) in eight steps between 0 and 2.1*10/sup 18/ n/cm/sup 2/. Notable irradiation effects include a T/sub c/ depression of nearly 2 K at the highest fluence and large improvements in the critical current density for fields from 0-9 T and temperatures from 4-80 K. Critical currents approaching 2*10/sup 7/ A/cm/sup 2/ are observed for optimally irradiated materials at 5 K (in zero field), while at 77 K J/sub c/(0 kOe) approaches 5*10/sup 5/ A/cm/sup 2/. Irradiation is seen to take a nearly equilibrium magnetization curve at 77 K and broaden it to a significantly hysteretic curve. A substantial shift in the effective pinning potential as a function of current density is inferred from magnetic relaxation measurement at H=1 T. This is the first such measurement in which systematically increased activation energies for flux creep (as a function of current density) are noted.

  • Anisotropy of the critical current in solid solution superconductor NbTi

    The critical current densities depend on density, size and distribution of pinning sites. Changing the round diameter of a superconductor causes an isotropic change of their distribution. By this an isotropic change of current densities is caused. Anisotropic change of the pinning site distribution by flattening causes an anisotropy of the current density. In the case of the induction perpendicular to the flat area a decrease of the critical current density is expected. In the case of the induction parallel to flat area an increase of jcis expected. Monocore NbTi conductors with different densities of α-Ti precipitates have been flattened with different aspect ratios and critical current densities for both casesB \parallel FandB \perp Fhave been measured with the following results: The anisotropy factorj_{c\parallel} / j_{c\perp}depends on the critical current density of the original round shaped conductor and on the aspect ratio for high critical current densities it is independent of B. Decreasing density of pinning sites, which means decreasing current density causes dependence of the anisotropy factor on the induction B.



Standards related to Critical current density

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IEEE Guide for Test Methods and Procedures to Evaluate the Electrical Performance of Insulators in Freezing Conditions

The guide specifies procedures for testing equipment when external insulation of the test object is subjected to combinations of contamination, ice, snow, or cold fog. The methods are applicable only to tests on equipment with a rated voltage above 1 kV.The guide specifies procedures for testing equipment when external insulation of the test object is subjected to combinations of contamination, ...


Recommended Practice for Measurements and Computation of Electric, Magnetic and Electromagnetic Fields With Respect to Human Exposure to Such Fields, 0 - 100 kHz

This recommended practice describes 1) methods for measuring external electric and magnetic fields and contact currents to which persons may be exposed, 2) instrument characteristics and the methods for calibrating such instruments, and 3) methods for computation and the measurement of the resulting fields and currents that are induced in bodies of humans exposed to these fields. This recommended practice ...