The microdefects in Te-rich PbTe coating material grown by Bridgman technique have been studied via transmission electron microscopy.The results indicate that the major microdefects in Te-rich PbTe crystal are plate-l...The microdefects in Te-rich PbTe coating material grown by Bridgman technique have been studied via transmission electron microscopy.The results indicate that the major microdefects in Te-rich PbTe crystal are plate-like defects lying on{100}plane and homogeneously distributed in the matrix with density about 1.7×10^(16)/cm^(3).They are originated from the precipitation of native point defects in Te-rich PbTe which occured in the cooling and annealing process and presented in the form of plates consisting of Te anti-site atoms or interstitial Te atoms.展开更多
Annealing effects are helpful guides to study Pt/Co multilayer interface diffusions.However,the results reported till now are different.Here we report the increase in coercivity Hc and the decrease in Kerr rotationθk...Annealing effects are helpful guides to study Pt/Co multilayer interface diffusions.However,the results reported till now are different.Here we report the increase in coercivity Hc and the decrease in Kerr rotationθk after being annealed in vacuum or argon atmosphere.We attribute these effects to the formation of CoPt3 compound.展开更多
Detwinning and retwinnuig processes in the orthorhombic YBa_(2)Cu_(3)O_(7-δ) have been directly observed under appropriate electron irradiation by transmission electron microscope.These processes can be repeated many...Detwinning and retwinnuig processes in the orthorhombic YBa_(2)Cu_(3)O_(7-δ) have been directly observed under appropriate electron irradiation by transmission electron microscope.These processes can be repeated many times and are accompanied by twin domsdn fragmentation and appreciable increase of twin interface density which is a potential pinning center in YBa_(2)Cu_(3)O_(7-δ),The meaning of this effect in raising J_(c) of the material YBa_(2)Cu_(3)O_(7-δ) is suggested and discussed.展开更多
文摘The microdefects in Te-rich PbTe coating material grown by Bridgman technique have been studied via transmission electron microscopy.The results indicate that the major microdefects in Te-rich PbTe crystal are plate-like defects lying on{100}plane and homogeneously distributed in the matrix with density about 1.7×10^(16)/cm^(3).They are originated from the precipitation of native point defects in Te-rich PbTe which occured in the cooling and annealing process and presented in the form of plates consisting of Te anti-site atoms or interstitial Te atoms.
基金the State Key Laboratory of Functional Materials for Informatics.
文摘Annealing effects are helpful guides to study Pt/Co multilayer interface diffusions.However,the results reported till now are different.Here we report the increase in coercivity Hc and the decrease in Kerr rotationθk after being annealed in vacuum or argon atmosphere.We attribute these effects to the formation of CoPt3 compound.
基金Supported by the Center for Research and Development on Superconductivity of China.
文摘Detwinning and retwinnuig processes in the orthorhombic YBa_(2)Cu_(3)O_(7-δ) have been directly observed under appropriate electron irradiation by transmission electron microscope.These processes can be repeated many times and are accompanied by twin domsdn fragmentation and appreciable increase of twin interface density which is a potential pinning center in YBa_(2)Cu_(3)O_(7-δ),The meaning of this effect in raising J_(c) of the material YBa_(2)Cu_(3)O_(7-δ) is suggested and discussed.
