低温与超导
低溫與超導
저온여초도
CRYOGENICS AND SUPERCONDUCTIVITY
2009年
7期
27-29
,共3页
MgB2超导薄膜%退火时间%转变温度%晶体结构%表面形貌
MgB2超導薄膜%退火時間%轉變溫度%晶體結構%錶麵形貌
MgB2초도박막%퇴화시간%전변온도%정체결구%표면형모
Superconducting MgB2 thin films%Annealing time%Critical temperature%Crystal structure%Surface morphology
在多晶Al2O3衬底上,以B2H6作为硼源,化学气相沉积先驱B薄膜,采用Mg扩散方法,在不同退火时间条件下制备了MgB2超导薄膜.通过电阻-温度曲线测量、X射线衍射分析和扫描电子显微镜形貌观测方法,研究了退火时间对MgB2薄膜的超导特性、晶体结构、表面形貌的影响.
在多晶Al2O3襯底上,以B2H6作為硼源,化學氣相沉積先驅B薄膜,採用Mg擴散方法,在不同退火時間條件下製備瞭MgB2超導薄膜.通過電阻-溫度麯線測量、X射線衍射分析和掃描電子顯微鏡形貌觀測方法,研究瞭退火時間對MgB2薄膜的超導特性、晶體結構、錶麵形貌的影響.
재다정Al2O3츤저상,이B2H6작위붕원,화학기상침적선구B박막,채용Mg확산방법,재불동퇴화시간조건하제비료MgB2초도박막.통과전조-온도곡선측량、X사선연사분석화소묘전자현미경형모관측방법,연구료퇴화시간대MgB2박막적초도특성、정체결구、표면형모적영향.
The samples of superconducting MgB2 thin films are prepared on Al2O3 polycrystalline substrates under various annealing times by a two-step ex-situ magnesium-diffusion method with the precursor boron thin films grown by CVD from B2H6. Influences of annealing time on the critical temperature, crystal structure and surface morphology of MgB2 thin films are investigated by the methods of resistance-temperature curve measurement, X-ray diffraction analysis, scanning electron microscope observation.
