Hsiao-Wen Yu - Academia.edu (original) (raw)
Papers by Hsiao-Wen Yu
2013年中國材料科學學會年會 2013-10-18 2013-10-19 臺灣桃園（國立中央大學）, Oct 18, 2013
I-V, V-@ characteristics and atomic force images of grain boundary Josephson junctions fabricated... more I-V, V-@ characteristics and atomic force images of grain boundary Josephson junctions fabricated on SrTiO, bicrystal substrates were investigated. The half integer Shapiro steps and I, versus B curves show evidence of the inhomogeneous current distribution along the grain boundary junction. The dc SQUID formed on the grain boundary shows the expected V-CD curve. The AFM images, R-T curves and I,R, product reveal sequential destructive deterioration of the junction originating from the underlying grooved substrate. The results are discussed.
2016 5th International Symposium on Next-Generation Electronics (ISNE), 2016
La0.7Sr0.3MnO3 (LSMO) toroidal inductors sintered at 1300°C for various sintering time have been ... more La0.7Sr0.3MnO3 (LSMO) toroidal inductors sintered at 1300°C for various sintering time have been fabricated for magnetic field sensing. The complex permeability spectra show relaxation character due to domain wall displacement. As the sintering time increases, the permeability increases and the resonance frequency fr decreases. Under applied magnetic field, the permeability decreases and fr increases. Large shift of fr by low fields was observed. The 8 hr sintering sample exhibits a best magnetic field to frequency transfer ratio of 5.13 kHz/G. Our measured results indicate that LSMO is a promising material for the design and fabrication of low-cost magnetic field sensors.
Physica C: Superconductivity, 2000
Using atomic force microscope AFM , we have investigated the correlation between the characterist... more Using atomic force microscope AFM , we have investigated the correlation between the characteristics of grooved Ž. Ž. Ž. SrTiO STO bicrystal line and the grain-boundary GB microstructure of the YBa Cu O YBCO film. When the 3 2 3 y underlying groove becomes deeper and steeper, the density of growth spirals along the boundary line increases and the meandering configuration of GB gradually disappears. From the measured signals of the dc-SQUIDs patterned on the films, we also conclude that the homogeneity of the GB is improved.
IEEE Transactions on Appiled Superconductivity, 2001
We have designed and fabricated the directly coupled YBa2Cu3O7.s dc SQUID magnetometers with two ... more We have designed and fabricated the directly coupled YBa2Cu3O7.s dc SQUID magnetometers with two different modulation schemes to study the crosstalk effect in the on-chip multi-channel magnetometers. In one of the modulation schemes, the modulation current was directly injected into the SQUID body and the pickup coil. The modulation efficiency was changed by the ratio of the modulation current flowing through the SQUID to the pickup coil. In the other schemes, the modulation flux is mutually coupled through an external coil, and the modulation efficiency was changed by the mutual inductance of the external coil and the magnetometer. The results show that the modulation efficiency was varied when the value of self-inductance or the mutual inductance of SQUIDs change. Usually, lower modulation efficiency results in a higher crosstalk. The performance of magnetometers was also influenced by different modulation schemes. Their noise spectrum was compared as evidence.
IEEE Transactions on Appiled Superconductivity, 1999
I-V, V-Φ characteristics and atomic force images of grain boundary Josephson junctions fabricated... more I-V, V-Φ characteristics and atomic force images of grain boundary Josephson junctions fabricated on SrTiO3 bicrystal substrates were investigated. The half integer Shapiro steps and Ic versus B curves show evidence of the inhomogeneous current distribution along the grain boundary junction. The dc SQUID formed on the grain boundary shows the expected V-Φ curve. The AFM images, R-T curves and
2013年中國材料科學學會年會 2013-10-18 2013-10-19 臺灣桃園（國立中央大學）, Oct 18, 2013
I-V, V-@ characteristics and atomic force images of grain boundary Josephson junctions fabricated... more I-V, V-@ characteristics and atomic force images of grain boundary Josephson junctions fabricated on SrTiO, bicrystal substrates were investigated. The half integer Shapiro steps and I, versus B curves show evidence of the inhomogeneous current distribution along the grain boundary junction. The dc SQUID formed on the grain boundary shows the expected V-CD curve. The AFM images, R-T curves and I,R, product reveal sequential destructive deterioration of the junction originating from the underlying grooved substrate. The results are discussed.
2016 5th International Symposium on Next-Generation Electronics (ISNE), 2016
La0.7Sr0.3MnO3 (LSMO) toroidal inductors sintered at 1300°C for various sintering time have been ... more La0.7Sr0.3MnO3 (LSMO) toroidal inductors sintered at 1300°C for various sintering time have been fabricated for magnetic field sensing. The complex permeability spectra show relaxation character due to domain wall displacement. As the sintering time increases, the permeability increases and the resonance frequency fr decreases. Under applied magnetic field, the permeability decreases and fr increases. Large shift of fr by low fields was observed. The 8 hr sintering sample exhibits a best magnetic field to frequency transfer ratio of 5.13 kHz/G. Our measured results indicate that LSMO is a promising material for the design and fabrication of low-cost magnetic field sensors.
Physica C: Superconductivity, 2000
Using atomic force microscope AFM , we have investigated the correlation between the characterist... more Using atomic force microscope AFM , we have investigated the correlation between the characteristics of grooved Ž. Ž. Ž. SrTiO STO bicrystal line and the grain-boundary GB microstructure of the YBa Cu O YBCO film. When the 3 2 3 y underlying groove becomes deeper and steeper, the density of growth spirals along the boundary line increases and the meandering configuration of GB gradually disappears. From the measured signals of the dc-SQUIDs patterned on the films, we also conclude that the homogeneity of the GB is improved.
IEEE Transactions on Appiled Superconductivity, 2001
We have designed and fabricated the directly coupled YBa2Cu3O7.s dc SQUID magnetometers with two ... more We have designed and fabricated the directly coupled YBa2Cu3O7.s dc SQUID magnetometers with two different modulation schemes to study the crosstalk effect in the on-chip multi-channel magnetometers. In one of the modulation schemes, the modulation current was directly injected into the SQUID body and the pickup coil. The modulation efficiency was changed by the ratio of the modulation current flowing through the SQUID to the pickup coil. In the other schemes, the modulation flux is mutually coupled through an external coil, and the modulation efficiency was changed by the mutual inductance of the external coil and the magnetometer. The results show that the modulation efficiency was varied when the value of self-inductance or the mutual inductance of SQUIDs change. Usually, lower modulation efficiency results in a higher crosstalk. The performance of magnetometers was also influenced by different modulation schemes. Their noise spectrum was compared as evidence.
IEEE Transactions on Appiled Superconductivity, 1999
I-V, V-Φ characteristics and atomic force images of grain boundary Josephson junctions fabricated... more I-V, V-Φ characteristics and atomic force images of grain boundary Josephson junctions fabricated on SrTiO3 bicrystal substrates were investigated. The half integer Shapiro steps and Ic versus B curves show evidence of the inhomogeneous current distribution along the grain boundary junction. The dc SQUID formed on the grain boundary shows the expected V-Φ curve. The AFM images, R-T curves and