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無氟MOD法制備DyBa2Cu3O7-x膜的高溫?zé)崽幚磉^程研究
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國家自然科學(xué)基金(50672078)；國家杰出青年基金(50588201)和國家“973”項(xiàng)目(2007CB616906)


High Temperature Treatment of DyBa2Cu3O7-x Thin Film Prepared by F-Free Metal Organic Deposition Method
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    摘要:

    采用無氟金屬有機(jī)物沉積法(MOD)在(00l)取向的LaAlO3 單晶基底上制備出DyBa2Cu3O7-x(DyBCO)超導(dǎo)薄膜。由于采用了無氟金屬有機(jī)物體系，分解過程中避免了采用傳統(tǒng)的三氟醋酸鹽時(shí)有害氣體的產(chǎn)生。SEM分析表明，成相過程中增加高溫?zé)崽幚磉^程，可以明顯提高外延生長薄膜的質(zhì)量。X射線衍射(XRD)分析及φ掃描的結(jié)果表明，經(jīng)過高溫處理的DyBCO薄膜具有良好的面內(nèi)外織構(gòu)。本研究制備的DyBCO薄膜的超導(dǎo)轉(zhuǎn)變溫度達(dá)92 K，77 K自場(chǎng)下的臨界電流密度達(dá)到1.8 MA/cm2

    Abstract:

    Epitaxial DyBa2Cu3O7-x(DyBCO) superconductive thin film was fabricated via a F-free metal organic deposition (MOD) method on the (00l) single crystal substrate of LaAlO3. Because of the fluorine-free metal organic system, harmful gas by the normal TFA-MOD approach was avoided during the heat treatment. A high temperature treatment was introduced during the growth of DyBCO film and then the SEM observation shows denser microstructure and better texture of the film. X-ray diffraction pattern reveals the c-axis oriented grains. φ-scan also shows an excellent in-plane texture in the DyBCO film with a high temperature treatment. The DyBCO film fabricated by F-free MOD with a high temperature treatment has a superconductivity transition temperature of 92 K and a critical current density of 1.8 MA/cm2 at 77 K in self-field

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師曉燕,蒲明華,王文濤,趙 勇.無氟MOD法制備DyBa2Cu3O7-x膜的高溫?zé)崽幚磉^程研究[J].稀有金屬材料與工程,2010,39(4):707~710.[Shi Xiaoyan, Pu Minghua, Wang Wentao, Zhao Yong. High Temperature Treatment of DyBa2Cu3O7-x Thin Film Prepared by F-Free Metal Organic Deposition Method[J]. Rare Metal Materials and Engineering,2010,39(4):707~710.]
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  • 收稿日期:2009-04-23
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