Thin superconducting films of YBa_(2)Cu_(3)O_(7-Δ) have been prepared by magnetron reactive sputter deposition and subsequent heat treatment・The composition of the thin films has been determined by x-ray fluorescence...Thin superconducting films of YBa_(2)Cu_(3)O_(7-Δ) have been prepared by magnetron reactive sputter deposition and subsequent heat treatment・The composition of the thin films has been determined by x-ray fluorescence spectrum analysis,the structure by x-ray diffraction,and the morphology by scannina electron microscope,The results indicated that the crystallization process of the thin films on different substrates are markedly different.Best results are obtained on film deposited on SrTiO_(3) substrate,however,there still exists some non-superconducting phase at the grain boundaries making the superconducting phase weakly linked.展开更多
We briefly describe our results to date on the magnetron sputtering deposition of Ba_(x)Y_(1+x)CuO_(3-y) thin films with T_(c) onset=96K and T_(R=0)=83K.We emphasize the importance of the characteristics of the substr...We briefly describe our results to date on the magnetron sputtering deposition of Ba_(x)Y_(1+x)CuO_(3-y) thin films with T_(c) onset=96K and T_(R=0)=83K.We emphasize the importance of the characteristics of the substrate material.The perovskite-SrTiO_(3) substrate ddposits high T_(R=0) and J_(c) films.X-ray diffraction studies show that they are of single phase orthorhombic perovskite structure.展开更多
Ⅰ. INTRODUCTIONThere are many reports on the study of the high T_c oxide superconducting thin films. Now the main attention is focussed on how to prepare single-phase thin films and raise their critical current densi...Ⅰ. INTRODUCTIONThere are many reports on the study of the high T_c oxide superconducting thin films. Now the main attention is focussed on how to prepare single-phase thin films and raise their critical current density J_c, in order to realize the usage of superconducting electronic devices operating at liquid nitrogen temperature in展开更多
A low temperature magnetic fore microscope for the study of high temperature superconductor is developed. It has been applied to spatially resolve single vortices at law temperature (77K) in a YBa2Cu3O7-x thin film de...A low temperature magnetic fore microscope for the study of high temperature superconductor is developed. It has been applied to spatially resolve single vortices at law temperature (77K) in a YBa2Cu3O7-x thin film deposited by laser ablation on a NdGaO3 substrate. The images of disordered vortex arrangements are obtained. The movement of single vortices after a contact mode scanning of the detecting tip over the thin film surface is observed. The reason for the movement is discussed.展开更多
文摘Thin superconducting films of YBa_(2)Cu_(3)O_(7-Δ) have been prepared by magnetron reactive sputter deposition and subsequent heat treatment・The composition of the thin films has been determined by x-ray fluorescence spectrum analysis,the structure by x-ray diffraction,and the morphology by scannina electron microscope,The results indicated that the crystallization process of the thin films on different substrates are markedly different.Best results are obtained on film deposited on SrTiO_(3) substrate,however,there still exists some non-superconducting phase at the grain boundaries making the superconducting phase weakly linked.
基金supported by the National Science Foundation of China。
文摘We briefly describe our results to date on the magnetron sputtering deposition of Ba_(x)Y_(1+x)CuO_(3-y) thin films with T_(c) onset=96K and T_(R=0)=83K.We emphasize the importance of the characteristics of the substrate material.The perovskite-SrTiO_(3) substrate ddposits high T_(R=0) and J_(c) films.X-ray diffraction studies show that they are of single phase orthorhombic perovskite structure.
基金Project supported by the National Natural Science Foundation of China.
文摘Ⅰ. INTRODUCTIONThere are many reports on the study of the high T_c oxide superconducting thin films. Now the main attention is focussed on how to prepare single-phase thin films and raise their critical current density J_c, in order to realize the usage of superconducting electronic devices operating at liquid nitrogen temperature in
文摘A low temperature magnetic fore microscope for the study of high temperature superconductor is developed. It has been applied to spatially resolve single vortices at law temperature (77K) in a YBa2Cu3O7-x thin film deposited by laser ablation on a NdGaO3 substrate. The images of disordered vortex arrangements are obtained. The movement of single vortices after a contact mode scanning of the detecting tip over the thin film surface is observed. The reason for the movement is discussed.
