USE OF RBS AND RAMAN-SPECTROSCOPY TO STUDY OXYGEN MOBILITY IN YBACUO THIN-FILMS BY O-18 TRACING EXPERIMENTS

被引:12
作者
WONG, JCC
ORTEGA, C
SIEJKA, J
TRIMAILLE, I
SACUTO, A
BALKANSKI, M
VIZKELETHY, G
机构
[1] UNIV PARIS 06,F-75230 PARIS 05,FRANCE
[2] UNIV PARIS 06,PHYS SOLIDES LAB,F-75252 PARIS 05,FRANCE
[3] CORNELL UNIV,DEPT MAT SCI & ENGN,ITHACA,NY 14853
关键词
D O I
10.1016/0168-583X(92)95461-Y
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
The O-18 tracer technique is particularly well adapted to study the mobility of oxygen and to evidence the presence of oxygen sites of different energies. The annealing experiments in a pure oxygen atmosphere enriched to > 98% O-18 were performed for 19 h at 200 mbar and at three different temperatures: 350, 450 and 650-degrees-C. At 350, and at 450-degrees-C the orthorhombic phase was totally preserved (Y1Ba2Cu3O7), whereas at 650-degrees-C the nominal oxygen composition was O6.4 and corresponds to the orthorhombic-tetragonal transition. All the experiments were performed using YBaCuO samples deposited on MgO substrate by laser ablation or cathodic sputtering. The samples were characterized by X-rays and T(c) measurements. Their composition and structure were studied by RBS, NRA and ion channeling. The O-18 distribution was studied using the resonant nuclear reaction at 629 keV. The localization in the YBaCuO structure of the O-18 atoms was studied using Raman spectroscopy. It was found that the O-18 uptake at 350-degrees-C leads to the formation of a thin surface layer (15 nm) enriched to about 30% whereas the volume enrichment appears to be low (3.5%) and quasi-constant. This result suggests that the O-18 exchange at 350-degrees-C is controlled by the diffusion. The reoxidation in O-18 atmosphere of partially reduced sample is shown to be much quicker than that observed by direct exchange. It was found that the O-18 exchange at 450-degrees-C leads to a quasi-constant O-18 profile (enrichment to 70% was observed after annealing during 19 h). The Raman spectroscopy showed that the annealing at 450-degrees-C induced equivalent exchange in CuO2 planes and of the bridging oxygen. The annealing at 650-degrees-C leads to a total exchange between O-16 and O-18.
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收藏
页码:179 / 183
页数:5
相关论文
共 10 条
[1]   USE OF THE O-16(HE-3,ALPHA)O-15 REACTION FOR STUDYING OXYGEN-CONTAINING THIN-FILMS [J].
ABEL, F ;
AMSEL, G ;
DARTEMARE, E ;
ORTEGA, C ;
SIEJKA, J ;
VIZKELETHY, G .
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1990, 45 (1-4) :100-104
[2]  
ABEL F, IN PRESS NUCL INSTR
[3]   7ICROANALYSIS BY DIRECT OBSERVATION OF NUCLEAR REACTIONS USING A 2 MEV VAN-DE-GRAAFF [J].
AMSEL, G ;
NADAI, JP ;
DARTEMAR.E ;
DAVID, D ;
GIRARD, E ;
MOULIN, J .
NUCLEAR INSTRUMENTS & METHODS, 1971, 92 (04) :481-&
[4]   THE USE OF THE 3.05 MEV OXYGEN RESONANCE FOR HE-4 BACKSCATTERING NEAR-SURFACE ANALYSIS OF OXYGEN-CONTAINING HIGH Z-COMPOUNDS [J].
BLANPAIN, B ;
REVESZ, P ;
DOOLITTLE, LR ;
PURSER, KH ;
MAYER, JW .
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1988, 34 (04) :459-464
[5]   CORRELATION BETWEEN THE INSITU GROWTH-CONDITIONS OF YBCO THIN-FILMS AND THE THERMODYNAMIC STABILITY-CRITERIA [J].
HAMMOND, RH ;
BORMANN, R .
PHYSICA C, 1989, 162 :703-704
[6]  
IRVIN JC, 1990, J MATER RES, V5, P2780
[7]   A STUDY BY NUCLEAR MICROANALYSIS AND O-18 TRACING OF THE GROWTH OF ANODIC OXIDE-FILMS ON ZIRCONIUM .2. OXIDE-GROWTH MECHANISM [J].
ORTEGA, C ;
SIEJKA, J .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1982, 129 (09) :1905-1917
[8]   AN O-18 STUDY OF THE OXIDATION MECHANISM OF SILICON IN DRY OXYGEN [J].
ROCHET, F ;
AGIUS, B ;
RIGO, S .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1984, 131 (04) :914-923
[9]   TRACER DIFFUSION OF OXYGEN IN YBA2CU3O7-DELTA [J].
ROTHMAN, SJ ;
ROUTBORT, JL ;
BAKER, JE .
PHYSICAL REVIEW B, 1989, 40 (13) :8852-8860
[10]   SUPERCONDUCTING AND STRUCTURAL-PROPERTIES OF YBACUO THIN-FILMS DEPOSITED BY INVERTED CYLINDRICAL MAGNETRON SPUTTERING [J].
XI, XX ;
LINKER, G ;
MEYER, O ;
NOLD, E ;
OBST, B ;
RATZEL, F ;
SMITHEY, R ;
STREHLAU, B ;
WESCHENFELDER, F ;
GEERK, J .
ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1989, 74 (01) :13-19