| 41. |
High‐qualityc‐axis oriented superconducting Nd1+xBa2−xCu3O7−dthin films deposited by the laser ablation method |
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Applied Physics Letters,
Volume 66,
Issue 16,
1995,
Page 2131-2133
Massoud Badaye,
Furen Wang,
Yukio Kanke,
Kensuke Fukushima,
Tadataka Morishita,
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摘要:
High‐quality single phase Nd1+xBa2−xCu3O7−dthin films have been fabricated on SrTiO3substrates by the laser ablation method. The resistivity of the deposited films are usually lower than that of the YBCO film. TheTc(onset)andTc(R=0)in the optimized thin films are as high as 91 and 88 K, respectively. The crystallinity of our films are higher than the best YBCO films ever reported. The rocking curve FWHM of the (005) peaks in our thin films is typically 0.05°, which is superior to the best reported YBCO films. ©1995 American Institute of Physics.
ISSN:0003-6951
DOI:10.1063/1.113926
出版商:AIP
年代:1995
数据来源: AIP
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| 42. |
Specific capacitance of Nb/AlOx/Nb Josephson junctions with critical current densities in the range of 0.1–18 kA/cm2 |
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Applied Physics Letters,
Volume 66,
Issue 16,
1995,
Page 2134-2136
M. Maezawa,
M. Aoyagi,
H. Nakagawa,
I. Kurosawa,
S. Takada,
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摘要:
The specific capacitanceCsof Nb/AlOx/Nb Josephson tunnel junction has been measured by means of the superconducting quantum interference device (SQUID) resonance technique. We have investigated the junctions with critical current densitiesJcin the range of 0.1–18 kA/cm2and found that 1/Cslinearly depends on a logarithm ofJc. This suggests that the barrier thickness is moderately uniform in the junction area and increases continuously during growth. The results also show that increasingJcreduces time constants of the junction. ©1995 American Institute of Physics.
ISSN:0003-6951
DOI:10.1063/1.113927
出版商:AIP
年代:1995
数据来源: AIP
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| 43. |
Characteristics of oxygen over‐reduced Nd1.85Ce0.15CuO4−yfilms |
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Applied Physics Letters,
Volume 66,
Issue 16,
1995,
Page 2137-2139
S. N. Mao,
Wu Jiang,
X. X. Xi,
Qi Li,
J. L. Peng,
R. L. Greene,
T. Venkatesan,
D. Prasad Beesabathina,
L. Salamanca‐Riba,
X. D. Wu,
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摘要:
We have studied the oxygen doping effect in thin Nd1.85Ce0.15CuO4−y(NCCO) films. Contrary to the common believe that the disappearance of superconductivity in the over‐reduced NCCO samples is a consequence of phase decomposition, we found that there exists an over‐reduced region in which the crystallographic structure of the film remains essentially the same as in the optimum‐oxygen doped region, but the film becomes insulating. Rutherford backscattering spectroscopy channeling analysis reveals that the oxygen over‐reduction increases atomic distortion in the lattice. This work provides strong support to previous transport studies by Jiangetal. [Phys. Rev. Lett.73, 1291 (1994)], which suggested the existence of both electron and hole carriers in superconducting NCCO. ©1995 American Institute of Physics.
ISSN:0003-6951
DOI:10.1063/1.113928
出版商:AIP
年代:1995
数据来源: AIP
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| 44. |
Growth‐induced uniaxial in‐plane magnetic anisotropy for ultrathin Fe deposited on MgO(001) by oblique‐incidence molecular beam epitaxy |
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Applied Physics Letters,
Volume 66,
Issue 16,
1995,
Page 2140-2142
Yongsup Park,
Eric E. Fullerton,
S. D. Bader,
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摘要:
In‐plane uniaxial magnetic anisotropy is observed in the magnetic hysteresis loops of ultrathin Fe films grown on MgO(001) by means of oblique‐incidence molecular beam epitaxy. The films are deposited from an angle of 45° from the surface normal in the (100) azimuth toward the [100]. The easy axis of magnetization is perpendicular to the incident Fe‐beam direction. A strong structural asymmetry is observed in x‐ray photoelectron diffraction and attributed to an oriented morphology that drives the growth‐induced magnetic anisotropy. ©1995 American Institute of Physics.
ISSN:0003-6951
DOI:10.1063/1.113929
出版商:AIP
年代:1995
数据来源: AIP
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