한국수소및신에너지학회논문집 (Transactions of the Korean hydrogen and new energy society)
- 제7권1호
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- Pages.71-79
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- 1996
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- 1738-7264(pISSN)
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- 2288-7407(eISSN)
Hydrogen Absorption and Electronic Property Change of Yttrium Thin Films
초록
Yttrium thin film, 580nm thick, was prepared by electron beam evaporation. Film was hydrogenated room temperature upto 40 bar hydrogen pressure, without any activation process. Hydrogen concentration was determined by a quartz-crystal microbalance(QCM) method. YH2.9 sample was made without any pulverization. Electrical resistance was measured by four-point DC method in the temperature range between room temperature and 30K for various hydrogen concentration, x=0 to 2.9 of YHx sample. Temperature dependent resistance of YH2.9 shows low temperature minimum at 105K, the metal-semiconductor transition at 260K, and a hystersis above 210K.
키워드