Contents PREFACE xxv ACKNOWLEDGMENTS xxvii MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS xxix PART I: PLENARY SESSION I OXIDE SUPERCONDUCTORS: A CHEMIST'S VIEW 3 A.W. Sleight NEUTRON DIFFRACTION STUDIES OF HIGH Tc SUPERCONDUCTORS 9 D.G. Hinks, B. Dabrowski, K. Zhang, C.U. Segre, J, D, Jorgensen, L, Soderholm, and M.A. Beno Ba2YCu3O7_δ: EFFECT OF OXYGEN STOICHIOMETRY 19 R. J. Cava, B. Batlogg, A.P- Ramirez, D. Werder, C.H. Chen, E.A. Rietman, and S.M. Zahurak THEORIES OF HIGH Tc SUPERCONDUCTORS 27 John Bardeen PART II: PLENARY SESSION II MATERIALS ASPECTS OF OXIDE SUPERCONDUCTORS―EFFECT OF AMBIENT WATER ON SUPERCONDUCTIVITY 33 K. Kitazawa, K. Kishio, T. Hasegawa, A. Ohtomo, S. Yaegashi, S. Kanbe, K. Park, K. Kuwahara, and K. Fueki OXYGEN VACANCY ORDERING IN BaYCu3O7_x, 0<x<1, BY ELECTRON DIFFRACTION STUDIES 41 M.A. Alario-Franco, J.J- Capponi, C. Chain out, J. Chenavas, and M. Marezio THE PREPARATION OF BULK AND THICK FILMS OF YBa2Cu3O7-y USING A SOLUTION TECHNIQUE 49 P. Barboux, J.M. Tarascon, B.G. Bagley, L.H. Greene, G.W. Hull, B.W. Meagher, and C.B. Eom FERMI SURFACE IN La2CuO4-,δ DETERMINE BY POSITRON 2D-ACAR 57 Shoichiro Tanigawa, Yoji Mizuhara, Yoshikazu Hidaka, Migaku Oda, Minoru Suzuki, and Toshiaki Murakami HIGH-TC SUPERCONDUCTING FILMS OF Y-Ba-Cu OXIDE PREPARED BY A LOW PRESSURE PLASMA SPRAYING 63 K. Tachikawa, I. Watanabe, and S. Kosuge
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Contents
PREFACE xxv
ACKNOWLEDGMENTS xxvii
MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS xxix
PART I: PLENARY SESSION I
OXIDE SUPERCONDUCTORS: A CHEMIST'S VIEW 3A.W. Sleight
NEUTRON DIFFRACTION STUDIES OF HIGH Tc SUPERCONDUCTORS 9D.G. Hinks, B. Dabrowski, K. Zhang, C.U. Segre,J, D, Jorgensen, L, Soderholm, and M.A. Beno
Ba2YCu3O7_δ: EFFECT OF OXYGEN STOICHIOMETRY 19R. J. Cava, B. Batlogg, A.P- Ramirez, D. Werder,C.H. Chen, E.A. Rietman, and S.M. Zahurak
THEORIES OF HIGH Tc SUPERCONDUCTORS 27John Bardeen
PART II: PLENARY SESSION II
MATERIALS ASPECTS OF OXIDE SUPERCONDUCTORS―EFFECT OFAMBIENT WATER ON SUPERCONDUCTIVITY 33
K. Kitazawa, K. Kishio, T. Hasegawa, A. Ohtomo,S. Yaegashi, S. Kanbe, K. Park, K. Kuwahara,and K. Fueki
OXYGEN VACANCY ORDERING IN BaYCu3O7_x, 0<x<1, BYELECTRON DIFFRACTION STUDIES 41
M.A. Alario-Franco, J.J- Capponi, C. Chain out,J. Chenavas, and M. Marezio
THE PREPARATION OF BULK AND THICK FILMS OF YBa2Cu3O7-yUSING A SOLUTION TECHNIQUE 49
P. Barboux, J.M. Tarascon, B.G. Bagley, L.H. Greene,G.W. Hull, B.W. Meagher, and C.B. Eom
FERMI SURFACE IN La2CuO4-,δ DETERMINE BY POSITRON 2D-ACAR 57Shoichiro Tanigawa, Yoji Mizuhara, Yoshikazu Hidaka,Migaku Oda, Minoru Suzuki, and Toshiaki Murakami
HIGH-TC SUPERCONDUCTING FILMS OF Y-Ba-Cu OXIDE PREPAREDBY A LOW PRESSURE PLASMA SPRAYING 63
K. Tachikawa, I. Watanabe, and S. Kosuge
PART III: INVITED SESSION I
MAGNETISM, SPECIFIC HEAT, AND SURFACE TOPOGRAPHY OFOXIDE SUPERCONDUCTORS 71
H. Jenny, H. Bretscher, T. Frey, D. Anselmetti,H. Heinzelmann, R. Wiesendanger, G. Leemann,B. Walz, D. Sackinger, and H.-J. Guntherodt
THE EFFECTS OF OXYGEN STOICHIOMETRY AND OXYGEN ORDERINGON SUPERCONDUCTIVITY IN Y1Ba2Cu3O9-x 77
ON THE TWIN FORMATION IN ORTHORHOMBIC Y1Ba2CU3O7_y 233D. Rios-Jara, C. Varea, A. Robledo, A. Huanosta,J.M. Dominguez, J. Omaha, T. Akachi, and R. Escudero
PART VI; PREPARATION OF BULK MATERIALS I
Ba2YCu306B9 POWDER PREPARATION BY SOL-GEL EMULSIONTECHNIQUES 241
M.J. Cima, R- Chiu, and W.E. Rhine
SINTERING AND MICROSTRUCTURE - PROPERTY RELATIONS FORYBa2Cu3Ox 245
R.K. Bordia, H.S. Horowitz, M.A. Subramanian,J.B. Michel, E.M. McCarron, III, C.C. Torardi,J.D. Bolt, U. Chowdhry, E. Lopdrup, and S.J. Poon
SYNTHESIS AND CHARACTERIZATION OF Ba2Cu3PrO7_x 249J. Amador, C. Cascales, and I. Rasines
APPLICATION OF GEL TECHNOLOGY IN PREPARATION OF HIGH-TCPEROVSKITE SUPERCONDUCTORS 253
R.S. Liu, G.C. Lin, H.M. Sung, Y.C. Chen, andO.C.C. Lin
YBa2Cu3O7_6 SUPERCONDUCTORS PRODUCED BY HOT-PRESSING OFFREEZE-DRIED, CARBONATE- AND OXALATE-COPRECIPITATEDPOWDERS 257
THE FORMATION OF Y-Ba-Cu-0 PHASES DURING SOLID STATEREACTION 261
T.S- Chin, T.W. Huang, W.T. Lin, N.C. Wu,Y.H. Chou, T.C. Wu, P.T. Wu, and H.H. Yen
EFFECT OF THERMAL PROCESSING ON THE MICROSTRUCTURES ANDSUPERCONDUCTING PROPERTIES OF YBa2Cu3Oy 265
K. Gotoh, H. Enomoto, K. Iida, Y. Takano, N. Mori,and H. Ozaki
PROCESSING-PROPERTY RELATIONS IN YBa2CU3O6+x SUPER-CONDUCTORS 269
A. Safari, J.B. Wachtman, Jr., V. Parkhe,R. Caracciolo, D. Jeter, A.S. Rao, H.G.K. Sundar,N. Jisrawi, and W.L. McLean
LASER INDUCED DEPOSITION OF YBa2Cu3O7_x THIN FILMS 273H.S. Kwok, P. Mattocks, D.T. Shaw, L. Shi,X.W. Wang, S. Witanachchi, Q.Y. Ying, J.P. Zheng,and P. Bush
TOP SEEDED SOLUTION GROWTH OF LANTHANUM COPPER OXIDE 279P.J, Picone, H.P. Jenssen, D.R, Gabbe, andH.L. Tuller
EFFECT OF OXYGEN ANNEALING ON LOW-RESISTIVITY CONTACTSFOR HIGH-TC SUPERCONDUCTORS 283
J.W. Ekin, A.J. Panson, and B.A. Blankenship
PART VII: FILMS, WIRES, ETC. I
HIGH Tc SUPERCONDUCTING FILMS FROM METALLO-ORGANICPRECURSORS 289
W.W. Davison, S.G. Shyu, and R.C. Buchanan
FABRICATION AND SUPERCONDUCTING PROPERTIES OF HIGH TcOXIDE WIRE 293
N. Sadakata, Y, Ikeno, M. Nakagawa, K. Gotoh,and O. Kohno
A METAL-ALLOY PROCESS FOR THE FORMATION OF OXIDESUPERCONDUCTING FILMS: ADVANTAGES, PROBLEMSSUBSTRATE INTERACTIONS, BUFFER LAYERS 297
M. Gurvitch and A.T. Fiory
INTERFACE EFFECTS OF LASER ABLATED AND SPUTTERED HIGHTc SUPERCONDUCTING THIN FILMS 303
B. Dam, T.S. Bailer, G.N.A. van Veen,H.A.M. van Hal, J.W.C. De Vries, andG.M. Stollman
SPIN-ON THIN FILMS OF YBa2CU3O7_y AND La2-xSrxCuO4-yFROM CITRATE-POLYMER PRECURSORS 307
Yet-Ming Chiang, Sharon L. Furcone, Jeri Ann S.Ikeda, and David A. Rudman
FABRICATION OF HIGH Tc SUPERCONDUCTING FILMS WITHDIFFUSION BARRIERS 311
C.L. Chien, Gang Xiao, M.Z. Cieplak, A. Bakhshai,A. Gavrin, F.H. Streitz, and J. Childress
FORMATION OF THIN FILM YBaCuO SUPERCONDUCTORS FROMCu/BaO/Y2O3 LAYER STRUCTURES 315
EPR SPECTROSCOPY ON Zn-SUBSTITUTED YBa2Cu3O7 583A.M. Ponte Goncalves, Chan-Soo Jee, D. Nichols,J.E. Crow, G.H. Myer, R.E. Salomon, andP. Schlottmann
EFFECT OF OXIDIZING ATMOSPHERE ON SUPERCONDUCTIVITY INRBa2Cu3_xMxOz 587
David A. Robinson, M. Abbot Maginnis,A. Morrobel-Sosa, Chester Alexander, Jr.C. Asavaroengchai, Robert M. Metzger, andDonald A. Stanley
OXYGEN STOICHIOMETRY AND SUPERCONDUCTIVITY INHo!Ba2Cu307_x 591
B.C. Sales, Y.C. Kim, J.R. Thompson, D.K. Christen,L.A. Boatner, and S.T. Sekula
GROWTH OF SEPARATED YBa2CU3O7_x CRYSTALS 595Hans J, Scheel and F. Licci
ELECTRON DIFFRACTION AND TEM STUDIES OF Y1Ba2CU3O7_x 601R. Perez, J.G. Perez-Ranfirez, M. Avalos, J. Reyes,L. Martinez, E. Orozco, E. Carrillo, A. Mendoza,J. Al bar ran, J. Fu en tes Maya, J.L. BoldU", andM. Jose-Yacama'n
X-RAY ABSORPTION AND RESISTIVITY STUDIES OF THE QUINARY-COMPOUND SUPERCONDUCTOR Y-Ba-Cu-O-S 605
S. Spagna, J. Althoff, Y.D. Yao, F. Xu, L.Y. Jang,A. Krol, and Y.H. Kao
LOCAL ENVIRONMENT AROUND BARIUM ATOMS IN THE SUPER-CONDUCTOR Y-Ba-Cu-0 609
A. Krol, F. Xu, L.Y. Jang, C.J. Sher, S. Spagna,J. Althoff, and Y.H. Kao
PART X: PREPARATION OF BULK MATERIALS II
ADVANTAGES OF BARIUM PEROXIDE IN THE POWDER SYNTHESIS OFPEROVSKITE SUPERCONDUCTORS 615
A HYDROXYCARBONATE ROUTE TO SUPERCONDUCTOR PRECURSORPOWDERS 635
J.A. Voigt, B.C. Bunker, D.H. Doughty, D.L, Lamppa,and K.M. Kimball
IMPROVED MAGNETIZATION FOR YBa2CU3O7_6 ANNEALED INOXYGEN ABOVE 1000°C 639
E.L. Venturini, D.S. Ginley, R.J. Baughman,B. Morosin, and J.F. Kwak
EFFECTS AND BEHAVIOR OF IMPLANTED FLUORINE IN HIGHTEMPERATURE SUPERCONDUCTORS 643
J.R. Tesmer, C. J. Maggiore, M. Nastasi,S-W. Cheong, and C-M. Dick
GROWTH OF YBa2Cu3O7_δ SINGLE CRYSTALS AND FILMS BY AFLUX AND A SPUTTERING METHODS 647
K. Takagi, M, Hirao, M. Hiratani, H. Kakibayashi,T. Aida, and S. Takayama
COPPER MIXED-VALENCY IN A NEW ALUMINUM-BARIUM-COPPEROXIDE 651
Paul D. VerNooy, Michael A. Dixon, andAngelica M. Stacy
ANNEALING EFFECTS ON PROPERTIES OF HIGH Tc YBa2Cu3O7_xCERAMICS 655
Shin-Guang Shyu, R.F. Louh, and R.C. Buchanan
SUPERCONDUCTIVITY IN Y-Ba-Cu-Ag-0 AND Y-Ba-Cu-Pt-0SYSTEMS 659
V.T. Kovachev, M.M. Gospodinov, E.S. Vlachov,V.A. Lovchinov, P.K. Svestarov, K. A. Nenkov,A.K. Stoianova, D.A. Dimitrov, B.M. Terziiska,S. Tinchev, M. Taslakov, T. Mydlarz, and M. Czyczek
SINTERING TIME AND TEMPERATURE FOR Ba2YCu3O7_x SUPER-CONDUCTORS 663
Jenifer A.T. Taylor, Prinya Sainamthip, andDavid F. Dockery
PART XI: FILMS, WIRES, ETC. II
BULK CERAMIC AND SCREEN PRINTED EuBa2Cu3O7_δ 669W.S. Fu, D.S. Ginley, M.A. Mitchell, E.L.Venturini, B. Morosin, J.F. Kwak, andR.J. Baughman
FREESTANDING FILMS OF YBa2Cu3O6.9 673D.S. Ginley, M.A. Mitchell, *W. Fu, J.F. Kwak,E.L. Venturini, and R.J. Baughman
PREPARATION OF SUPERCONDUCTING THIN FILMS OF HIGH Tc
CUPRATES BY A NOVEL SPIN-ON/PYROLYSIS TECHNIQUE 677C.E. Rice, R.B. van Dover, and G.J. Fisanick
ION BEAM SPUTTERING AND PROPERTIES OF SUPERCONDUCTINGYBaCuO THIN FILMS 681
D. Pavuna, W. Baer, H. Berger, V. Gasparov,M. Schmidt, F. Vasey, and F-K. Reinhart
EFFECT OF UNIAXIAL STRAIN ON THE SUPERCONDUCTINGTRANSITION TEMPERATURE IN THIN YBa2CU3O7 FILM 685
S.I. Park, M.R. Scheuermann, C.C. Chi, andC.C. Tsuei
THE MORPHOLOGY OF YBa2Cu3O7_x THIN FILMS GROWN ONCERAMIC SUBSTRATES 719
L.A. Tietz, B.C. De Cooman, C.B. Carter,D.K. Lathrop, S.E. Russek, and R.A. Buhrman
HIGH-TC SUPERCONDUCTING FILMS OF Y-Ba-Cu OXIDE PREPAREDBY A Co2 LASER BEAM EVAPORATION 723
K. Tachikawa, I. Watanabe, S. Kosuge, and M. Ono
PREPARATION OF Y-Ba-Cu OXIDE SUPERCONDUCTING COMPOSITETAPES BY A DIFFUSION PROCESS 727
K.Tachikawa, M.Sugimoto, N.Sadakata, andO.Kohno
A VERSATILE NEW METALLO-ORGANIC SPIN-ON PROCESS FORPREPARING SUPERCONDUCTING THIN FILMS 731
M.E. Gross, M. Hong, S.H. Liou, and P.K. Gallagher
LASER INDUCED DEPOSITION OF YBa2Cu3O7_x THIN FILMS 735H.S. Kwok, P. Mattocks, D.T. Shaw, L. Shi,X.W. Wang, S. Witanachchi, Q.Y. Ying, J.P. Zheng,and P. Bush
PART XII: PHYSICAL PROPERTIES AND THEORY II
EXTERNAL AND INTERNAL DIFFUSION OF OXYGEN IN SUPER-CONDUCTING YBa2Cu3O7 COMPOSITE CONDUCTORS 741
B.A. Glowacki and J.E. Evetts
THERMAL CONDUCTIVITY OF SINGLE-CRYSTAL AND SINTEREDRBa2Cu3O7 AT LOW TEMPERATURES 745
J.E. Graebner, L.F. Schneemeyer, R.J. Cava,J.V. Waszczak, and E.A. Rietman
CRYSTAL STRUCTURES AND SUPERCONDUCTIVITY IN THELa1-5_xBai.5+xCu307+y SYSTEM 749
J.E. Greedan, A.H. O'Reilly, C.V. Stager,F. Razavi, and W. Abriel
ELECTRICAL CONDUCTIVITY AND THERMOGRAVIMETRIC STUDIESOF THE HIGH-TC SUPERCONDUCTOR YBa2CU3Ox 753
Y.H. Han and D.W. Monroe
ORIENTATION DEPENDENT X-RAY ABSORPTION NEAR EDGESTRUCTURE IN YBa2Cu3O7 AND Lai.85Sr0.I5CUO4 757
S.M. Heald, J.M. Tranquada, A.R. Moodenbaugh,and Y. Xu
THERMAL CONDUCTIVITY OF SUBSTITUTED PEROVSKITE SUPER-CONDUCTORS 761
J. Heremans and D.T. Morelli
TUNNELING MEASUREMENTS OF DENSITY OF STATES IN SUPER-CONDUCTING YBa2Cu3Oy 765
EVIDENCE FOR d-ELECTRON LOCALIZATION INYBa2(Cui_xZnx)3O7 FOR 0<x<0.16 769
C. Jee, D. Nichols, J. Ciasullo, J.E. Crow,T. Mihalisin, G.N. Myer, M.V. Kuric, S.H. Bloom,and R.P. Guertin
CRITICAL CURRENT DENSITY OF THE YBa2Cu3O7_5 SUPERCON-DUCTOR AS AFFECTED BY MICROSTRUCTURAL CONTROL 773
S. Jin, R.C. Sherwood, T.H. Tiefel, R.B. van Dover,G.W. Kammlott, M.E. Davis, R.A. Fastnacht, S.Nakahara, M.F. Yan, and D.W. Johnson, Jr.
OPTICAL REFLECTANCE STUDIES ON YBa2CU3O7-x AND RELATEDCOMPOUNDS 777
K. Kamara's, M.G. Doss, S.L. Herr, J.S. Kim,CD. Porter, G.R. Stewart, D.B. Tanner. D.A.Bonn. J.E. Greedan, A.H. O.Reilly. CV. Stager,T.Timusk, B. Keszei, S. Pekker, Gy. Hutiray, andL. Mihaly
VIBRATIONAL RAMAN SCATTERING FROM HIGH Tc SINGLECRYSTALS 781
D.M. Krol, M. Stavola, L.F. Schneemeyer,J.V. Waszczak, and W. Weber
MECHANISM OF Jc ENHANCEMENT OF YBa2CU3O7-<5DUE TOAg-DOPING 785
J.H. Kung, H.H. Yen, Y.C. Chen, CM. Wang, andP.T. Wu
EVALUATION OF CRITICAL CURRENT DENSITY IN Ba2YiCu3O7-yCOMPOUND 7 89
Hiroaki Kumakura, Mitsuru Uehara. KazuhikoTakahashi, and Kazumasa Togano
L3 WHITE LINE SPLITTING OF COPPER IN THE ELECTRONENERGY LOSS SPECTRUM OF YBa2Cu3O7_x 793
Channing C Ahn, David S. Lee, and Konrad Samwer
ATOMISTIC LATTICE CALCULATIONS OF THE DEFECT PROPERTIESOF La2CuO4 RELATED TO HIGH Tc SUPERCONDUCTIVITY 797
N.L. Allan and W.C MacKrodt
MAGNETIC TRANSITIONS IN HIGH-TC SUPERCONDUCTORS 801R.A. Barrio, C. Wang, J. Tagiiena-Martinez,D. Rios-Jara, T. Akachi, and R. Escudero
TRANSPORT AND MEISSNER EFFECT STUDIES FORYBa2(Cui-xZnx)3O7 805
S.H. Bloom, M.V. Kuric, Y.S. Yao, R.P. Guertin,D. Nichols, C Jee, A. Kebede, J.R. Crow,T. Mihalisin, G.N. Myer. and P. Schlottmann
EFFECT OF WATER AND IRON ON SLOWLY AND RAPIDLY COOLEDY1Ba2Cu3Og+x SUPERCONDUCTORS: AN EPR/NMR STUDY 809
U.S. Brahme, G. Kordas, and R.J. Kirkpatrick
PHONONS IN YBa2Cu3O7_x TYPE MATERIALS 813Gerald Burns, F.H. Dacol, P. Freitas, W. Konig,and T.S. Plaskett
RAMAN AND INFRARED STUDIES OF Sr2Ti04 - AN ISOMORPHOF (La,Sr)2Cu04 817
Gerald Burns, F.H. Dacol, G. Kliche. W. Konig,and M.W. Shafer
GRAIN BOUNDARY SEGREGATION AND THERMAL HISTORY EFFECTS
ON PROPERTIES OF La1.85Sr0.15CuO4-y SUPERCONDUCTORS 821Yet-Ming Chiang,.Alexana Roshko, Brian D. Fabes,Dominic K. Leung, Jeri Ann S. Ikeda. David A.Rudman, Michael J. Parker, and John R. Martin
LATTICE DYNAMICS AND IONICITY IN THE HIGH-TEMPERATURESUPERCONDUCTORS 825