This paper have made a systematic study of the superconducting Bi-2212 phase transition temperature,which has a transition temperature(Tc)around 80-93 K,and depends on precise control of synthesis conditions,mainly in...This paper have made a systematic study of the superconducting Bi-2212 phase transition temperature,which has a transition temperature(Tc)around 80-93 K,and depends on precise control of synthesis conditions,mainly including heat treatment parameters,oxygen partial pressure,and annealing temperature.Partial melting of the sample during preparation helps to raise its Tc.To elucidate the origin of this strong effect,the samples were heated with different melting process.The rapid changes in Tc value are associated with small changes in oxygen content,which depends on the annealing temperature and the oxygen partial pressure.We have optimized the above mentioned parameters for Bi-2212 film,and Tconset was improved to 93 K.展开更多
文摘This paper have made a systematic study of the superconducting Bi-2212 phase transition temperature,which has a transition temperature(Tc)around 80-93 K,and depends on precise control of synthesis conditions,mainly including heat treatment parameters,oxygen partial pressure,and annealing temperature.Partial melting of the sample during preparation helps to raise its Tc.To elucidate the origin of this strong effect,the samples were heated with different melting process.The rapid changes in Tc value are associated with small changes in oxygen content,which depends on the annealing temperature and the oxygen partial pressure.We have optimized the above mentioned parameters for Bi-2212 film,and Tconset was improved to 93 K.
