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http://dx.doi.org/10.9714/psac.2008.10.3.005

Comparative study of various buffer layers on IBAD- MgO template  

Ko, K.P. (서울대학교 재료공학부)
Jang, K.S. (서울대학교 재료공학부)
Yoo, S.I. (서울대학교 재료공학부)
Oh, S.S. (한국전기연구원 초전도재료연구그룹)
Ko, R.K. (한국전기연구원 초전도재료연구그룹)
Moon, S.H. ((주)서남)
Kim, H.K. ((주)서남)
Publication Information
Progress in Superconductivity and Cryogenics / v.10, no.3, 2008 , pp. 5-8 More about this Journal
Abstract
On highly-textured IBAD-MgO templates, we have tried to find proper buffer layers among various candidate materials, including $LaMnO_3$ (LMO), $La_2Zr_2O_7$ (LAO), $LaAlO_3$ (LAO), $LaGaO_3$ (LGO), $NdGaO_3$ (NGO), and $BaZrO_3$ (BZO). All buffer layers were deposited on the IBAD-MgO templates by KrF pulsed laser deposition(PLD). LAO layer showed an armorphous phase. LZO, LGO, and NGO layers showed polycrystalline growth. Only LMO and BZO layers exhibited c-axis oriented biaxially textured films. Optimally processed LMO buffer layer at deposition temperature of $750^{\circ}C$ and $PO_2$ of 100mTorr exhibited ${\triangle}{\phi}$ value of ${\sim}-5.2^{\circ}$ and RMS roughness of 5.6nm. Interestingly, BZO buffer layers with ${\triangle}{\phi}$ values of ${\sim}-6^{\circ}$ could be routinely produced over a wide PLD processing condition.
Keywords
IBAD-MgO; PLD; buffer layer; LMO; BZO;
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