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研究生:洪誌宏
研究生(外文):J.H. Horng
論文名稱:鉈鋇鈣銅氧1223相高溫超導薄膜之製備與特性研究
論文名稱(外文):Fabrication and Characterization of TlBa2Ca2Cu3O9±δ High-
指導教授:莊振益
指導教授(外文):J.Y. Juang
學位類別:碩士
校院名稱:國立交通大學
系所名稱:電子物理學系
學門:自然科學學門
學類:物理學類
論文種類:學術論文
論文出版年:1994
畢業學年度:82
語文別:中文
論文頁數:51
中文關鍵詞:鉈系1223相高溫超導薄膜直流濺鍍法多階段熱處理臨界電流密度
外文關鍵詞:Tl-1223 Superconducting Thin FilmsDC Sputtering Technique
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本研究已成功發展出以直流濺鍍法配合適當的熱處理製程製備單相,c-軸
成長之鉈系1223相高溫超導薄膜之製成技術。此外,除了找出成長高品質
鉈系1223相之條件外更根據我們對薄膜成長機制的瞭解成功地設計了兩套
不同多階段熱處理製程,以進一步改善薄膜之晶粒結構、表面狀態及超導
特性等。結果顯示,薄膜之超導溫度可達110K,尤有甚者,以本實驗所揭露
之製程方法所獲得之薄膜展現此一系統至目前為止之最高傳輸臨界電流密
度,顯示以此一簡單之自製系統製備高品質薄膜之可行性。此一結果不僅
更進一步証實了我們對鉈系1223相薄膜之成長機制的正確觀念,更明白指
出改善以符和實際應用所需之可行方向。

Singe phase, c-axis oriented TlBa2Ca2Cu3O9±δ superconducting
thin films with zero-resistance transition temperature(Tco)
above 110K have been obtained by DC- sputtering followed by
proper post-annealing process. In particular, the films
obtained by the present process has displayed the best
transport critical current results reported to-date for this
material, indicating the viability of the simple deposition
technique in obtaining high quality films. From the fundamental
point of view, however, it have been found that, with the exact
stoichiometry composition to start, the post annealing
conditions for forming pure Tl-1223 phase are extremely
restrictive. It is also noted that, in addition to the
harshness of the treatment conditions, the mechanism of the
formation of Tl-1223 phase may be dominated by the nucleation
and growth kinetics of the particular phase. There is no
sequential phase transformation between different phase when
the thermodynamical conditions provided in practice were fixed.
As a result, the morphology and properties of the films can be
improved by prolonged treatment with some proper arrangement.
Details of the experimental results will be presented and
discussed.

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