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Your search keyword '"D. Bein"' showing total 4 results
Start Over Author "D. Bein" Topic condensed matter::superconductivity
4 results on '"D. Bein"'

1. Ultrasonic measurements in sinter-forged high T/sub c/ superconductor YBa/sub 2/Cu/sub 3/O/sub 7- delta

Author

K.R. Poeppelmeier, Q. Robinson, A. Schenstrom, D. Bein, Shireen Adenwalla, Y. Hong, André Moreau, M.F. Xu, B.K. Sarma, Z. Zhao, D. L. Johnson, Shiou-Jyh Hwu, John B Ketterson, and M. Levy

Subjects
Superconductivity, Materials science, High-temperature superconductivity, Condensed matter physics, Attenuation, Ultrasonic testing, Sintering, Forging, Electronic, Optical and Magnetic Materials, law.invention, Hysteresis, law, Condensed Matter::Superconductivity, Electrical and Electronic Engineering, Anisotropy
Abstract

Both ultrasonic attenuation and velocity as a function of temperature from 4.2 K to room temperature were measured on sinter-forged samples of YBa/sub 2/Cu/sub 3/O/sub 7- delta /, which have more than 80% alignment of the c-axis of the grains parallel to the forging axis. Strong anisotropy was found both in the attenuation and the velocity when propagating sound waves in different directions relative to the forging axis. Hysteresis was observed in the velocity changes. >

Published
1989

2. Anisotropy of the Magnetic-Field—Induced Phase Transition in Superconducting UPt3

Author

Shireen Adenwalla, Bimal K. Sarma, D. Bein, Z. Zhao, Moises Levy, D. W. Hess, James A Sauls, Y. Hong, A. Schenstrom, T. Tokuyasu, John B Ketterson, David G. Hinks, and M. F. Xu

Subjects
Superconductivity, Phase transition, Materials science, Field (physics), Condensed matter physics, Condensed Matter::Superconductivity, General Physics and Astronomy, Anisotropy, Critical field, Magnetic flux, Vortex, Magnetic field
Abstract

Measurements of the attenuation of longitudinal ultrasound in superconducting UPt3, show a peak,below Hc2, which depends strongly on the orientation of the field relative to the c axis. We propose an explanation of this peak in terms of a vortex phase transition in an unconventional superconducting state, which is consistent with recent neutron-scattering data.

Published
1989

3. Ultrasonic attenuation in sinter-forged high Tc superconductor YBa2Cu3O7 − δ

Author

Bimal K. Sarma, André Moreau, Shireen Adenwalla, Z. Zhao, Q. Robinson, Shiou-Jyh Hwu, D. L. Johnson, M. F. Xu, Y. Hong, D. Bein, John B Ketterson, Moises Levy, and Kenneth R. Poeppelmeier

Subjects
Superconductivity, Shear waves, Materials science, Condensed matter physics, business.industry, General Engineering, Yba2cu3o7 δ, Forging, Computer Science::Robotics, Optics, Ultrasonic attenuation, Condensed Matter::Superconductivity, Computer Science::Multimedia, Perpendicular, Ultrasonic absorption, Anisotropy, business, Computer Science::Cryptography and Security
Abstract

We have measured ultrasonic absorption in sinter-forged high Tc YBa2Cu3O7 − δ. Owing to the anisotropic properties of the sinter-forged samples, longitudinal ultrasonic attenuation measurements showed very strong anisotropy when waves were propagated parallel and perpendicular to the forging axis. Sound absorption was found to increase with decreasing temperature for shear waves travelling parallel to the forging axis.

Published
1989

4. Anisotropy of the Magnetic-Field-Induced Phase Transition in Superconducting UPt3

Author

A. Schenstrom, Shireen Adenwalla, Y. Hong, Bimal K. Sarma, Moises Levy, M. F. Xu, D. Bein, James A Sauls, Z. Zhao, D. W. Hess, T. Tokuyasu, John B Ketterson, and David G. Hinks

Subjects
Superconductivity, Phase transition, Materials science, Field (physics), Condensed matter physics, Condensed Matter::Superconductivity, Orientation (geometry), Attenuation, Anisotropy, Vortex, Magnetic field
Abstract

Measurements of the attenuation of longitudinal ultrasound in superconducting UPt3, show a peak,below Hc2, which depends strongly on the orientation of the field relative to the c axis. We propose an explanation of this peak in terms of a vortex phase transition in an unconventional superconducting state, which is consistent with recent neutron-scattering data.

Published
1989

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