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PSI • Scientific Report 1999 /Volume Condensed Matter Research with Neutrons

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PSI • Scientific Report 1999 /Volume Condensed Matter Research with Neutrons C -C-H-- CH0000004 PAUL SCHERRER INSTITUT ISSN 1423-7326 March 2000 —< — u PSI • Scientific Report 1999 /Volume Condensed Matter Research with Neutrons 3 1/28 HoB6diffraction pattern measured on HRPT resolving the small rhombohedral distortion of 0.26° using the Ge511 monochromator (report see page 49). NOT FOR PUBLICATION Inquiries about copyright and reproduction, etc. should be addressed to the authors. PAUL SCHERRER INSTITUT ISSN 1423-7326 March 2000 Scientific Report 1999 Volume III Condensed Matter Research with Neutrons ed. by: Jurg Schefer, Denise Castellazzi, Margit Shea-Braun CH-5232 Villigen PSI Switzerland Phone: 056/310 21 11 Telefax: 056/310 21 99 www.psi.ch/fun Electronic Version: http://lns00.psi.ch/fun99/reports99.htm Condensed Matter Research with Neutrons Head: Dr. W.E. Fischer Secretary: R. Bercher Phone+41 (56)310.3402 FAX+41 (56)310.3131 WWW.PSI.CH/FUN Laboratory for Condensed Matter Low Temperarture Neutron Scattering Theory Facilities ETHZ & PSI Head: Head: Head: Prof. Dr. A. Furrer Dr. R. Morf Dr. S. Mango Secretaries: D. Castellazzi M. Shea-Braun Phone+41 (56)310.2087 Phone+41 (56)310.4459 Phone+41 (56)310.324! FAX+41 (56)310.2939 FAX+41 (56)310.2939 FAX+41 (56)310.3191 WWW.PSI.CH/LNS TABLE OF CONTENTS EDITORIAL 1 HIGH TEMPERATURE SUPERCONDUCTORS 5 PSEUDOGAP IN A BACK-EXCHANGED H0Ba2Cu408 COMPOUND: CONFIRMATION OF A 7 LARGE OXYGEN ISOTOPE EFFECT D. Rubio Temprano, J. Mesot, S. Janssen, K. Conder, A. Furrer, H. Mutka and K. A. Muller CHARGE ORDER IN Ho1.xCaxBa2Cu,Oy PROBED BY CEF INTERACTION 8 A. Podlesnyak, A. Mirmelstein, N. Golosova, B. E. Mitberg, F. Altorfer and A. Furrer MAGNETIC ORDER OF THE RARE EARTH IONS IN Er2Ba4Cu70143 9 G. Bottger, V. Pomjakushin, D. Clemens, P. Fischer, B. van den Brandt and S. Mango THE MAGNETIC RESONANCE IN UNDERDOPED Bi2212 AND ITS RELATION TO THE 10 ELECTRONIC SPECTRA M. Bohm, N. Metoki, K. Kadowaki, A. Hiess and J. Mesot HIGHLY CORRELATED ELECTRON SYSTEMS 11 MAGNETIC ORDERING IN (La1.yPry)07Ca03MnO3 13 V. Pomjakushin, A. Balagurov, P. Fischer, L. Keller, D. Sheptyakov, O.Gorbenko and A. Kaul CRYSTALLINE ELECTRIC FIELD AND MAGNETIC ORDER IN RNLB2C 14 U. Gasser, P. Allenspach and A. Furrer THE SUCCESSIVE MAGNETIC PHASE TRANSITIONS OF Dy3Pd20Si6 15 T. Herrmannsdorfer, A. Donni, P. Fischer, L. Keller and H. Kitazawa MAGNETIC ORDERING IN Tb2Pd2ln AND Ho2Pd2ln 16 T. Herrmannsdorfer, P. Fischer, G. Bottger, L. Keller, M. Giovannini and E. Bauer NEUTRON DIFFRACTION INVESTIGATION OF MAGNETIC ORDERING IN Ce3Cu3Sb4 17 T. Herrmannsdorfer, P. Fischer, P. Wachter, G. Wetzel and K. Mattenberger LOW DIMENSIONAL MAGNETISM 19 PHASE DIAGRAM OF THE QUANTUM SPIN SYSTEM KCuCI3 21 N. Cavadini, W. Henggeler, A. Furrer, K. Kramer, H.U. Gudel, H. Mutka and P. Vorderwisch KCuCI3 SINGLE CRYSTAL SPECTROSCOPY ON FOCUS 22 N. Cavadini, J. Mesot and S. Janssen MAGNETIC EXCITATIONS IN THE QUANTUM SPIN SYSTEM TICuCI3 23 G.Heigold, N.Cavadini, W.Henggeler, A.Furrer, K.Kramer, H.U.Gudel and H.Mutka SPIN-WAVE EXCITATIONS IN FINITE CHAIN SEGMENTS OF CsMn1.sMgxBr3 24 A. Furrer and H.U. Gudel MAGNETIC PHASE DIAGRAM OF THE SI-DOPED SPIN-PEIERLS COMPOUND CuGe^SLOj 25 F. Semadeni, P. Boni, T. Masuda, K. Uchinokura and G. Shirane f-ELECTRON MAGNETISM 27 DYNAMICAL SCALING FUNCTIONS IN FERROMAGNETIC EuS BELOW Tc 29 P. Boni, D. Gorlitz, J. Kotzler, B. Roessli and F. Semadeni CRYSTAL FIELD SPLITTING IN ErGa3 30 A. Murasik, A. Czopnik, E. Clementyev and J. Schefer CRYSTALLINE-ELECTRIC-FIELD IN IONIC CONDUCTOR Ho01Sr09CoO3.5 31 A. Podlesnyak, A. Mirmelstein, N. Golosova , B.E. Mitberg and F. Altorfer MAGNETIC EXCITATIONS IN Cs3Er2X9 (X=CI,Br,l) 32 D. Schaniel, P. Allenspach, A. Furrer, K. Kramer and H.U. Gudel EXCHANGE SPLITTING IN Cs3Er2Br9 33 D. Schaniel, P. Allenspach, A. Furrer, K. Kramer and H.U. Gudel METAMAGNETISM IN THE GREEN PHASE Er2BaCu05 34 D. Rubio Temprano, K. Conder, P. Allenspach, A. Furrer and V. Pomjakushin THE BAROCALORIC EFFECT IN CeSb 35 Th. Strassle, K. Mattenberger and A. Furrer THE BAROCALORIC EFFECT IN DILUTED Cex(La,Y)1.xSb 36 Th. Strassle, K. Mattenberger and A. Furrer MAGNETIC EXCITATIONS IN SINGLET GROUND STATE FERROMAGNET PrNi 37 E. Clementyev, P. Allenspach, P. Alekseev and V. Lazukov d-ELECTRON MAGNETISM 39 MAGNETIC EXCITATIONS IN CsMn(SO4)2- (D2O)12 41 R. Basler, H. Andres, H. U. Gudel, C. Dobe, P. Tregenna-Piggott and S. Janssen MAGNETIC ORDERING IN B2Cu04 42 J. Schefer, B. Roessli, U. Staub, A. Amato, G. Petrakovskii, P. Pattison and Ch. Baines SPIN-GLASS TRANSITION IN CuGa2O4 43 B. Roessli, A. Amato, C. Baines, F. Semadeni and G. Petrakovskii MAGNETIC EXCITATIONS IN THE S=5/2 ANTIFERROMAGNET RbMnCL, 44 N. Cavadini, A. Trottmann, A. Furrer, K.Kramer and H.U. Gudel CRITICAL FLUCTUATIONS IN THE WEAK ITINERANT Ni3AI 45 F. Semadeni, P. Vorderwisch, B. Roessli, T. Chatterji and P. Boni ON THE ORIGIN OF THE BIQUADRATIC EXCHANGE INTERACTION IN CsMn014Mgo8GBr3 46 Th. Strassle and A. Furrer STRUCTURE AND DYNAMICS 47 RHOMBOHEDRAL DISTORTION OF THE CUBIC CHEMICAL STRUCTURE OF HoB6 AT LOW 49 TEMPERATURES DUE TO QUADRUPOLAR ORDERING A. Donni, S. Kunii, L. Keller, P. Fischer, T. Herrmannsdorfer and V. Pomjakushin PRESSURE DEPENDENCE OF THE PHONON DENSITY OF STATES IN Pr01La09NiO3 50 Th. Strassle and A. Furrer DEUTERIUM ATOM DISTRIBUTION IN HEXAGONAL ZrCr2D4 51 P. Fischer and A. Skripov CHEMICAL DISORDER AND MAGNETIC ORDERING IN Ce2Pd2ln INVESTIGATED BY 52 COMBINED NEUTRON AND RESONANT X-RAY SCATTERING T. Herrmannsdorfer, P. Fischer, D. Schaniel, L. Keller, M. Giovannini, R. Hock and E. Bauer l1 STRUCTURE OF Y092Er008 BO3 53 M. Ren, J.H. Lin, Y. Dong, L.Q. Yang, M.Z. Su, LP. You and P. Allenspach MULTILAYERS AND SURFACES 55 STRESS AND MAGNETIC ANISOTROPY IN Fe089Co011/Si MULTILAYERS 57 D. Clemens, M. Horisberger and S. Wehrli ABSORPTION LAYERS FOR SUPERMIRROR POLARIZERS 58 S. Wehrli and D. Clemens POLARIZATION EFFICIENCY OF MULTILAYER MIRRORS PRODUCED AT PSI 59 H. Grimmer, O. Zaharko, M. Horisberger, H.-Ch. Mertins and F. Schafers SOFT X-RAY MAGNETIC CIRCULAR DICHROISM IN TRANSMISSION FOR POLARIMETRY AND 60 ELEMENTALLY RESOLVED MAGNETISM O. Zaharko, H. Grimmer, A.Cervellino, H.- Ch. Mertins and F. Schafers SOFT X-RAY RESONANT MAGNETIC SCATTERING OF Fe/C MULTILAYERS 61 O. Zaharko, H. Grimmer, H.- Ch. Mertins and F. Schafers INSTRUMENTAL AND SUPPORT ACTIVITIES 63 POLARISATION ANALYSIS WITH TASP USING REMANENT BENDERS 65 P. Boni, B. Roessli and F. Semadeni HRPT DEVELOPMENTS AND FIRST EXPERIMENTS AT SINQ 66 P.Fischer, G.Frey, M. Koch, M. Konnecke, V. Pomjakushin, J. Schefer, R. Schneider, R. Thut, N. Schlumpf, R. Burge, U. Greuter, S. Bondt and E. Berruyer TriCS: FIRST YEAR OF OPERATION 67 J.Schefer, P. Keller, M. Konnecke, O. Zaharko, Th. Strassle and J. Felsche DRUCHAL USER OPERATIONS IN 1999 AND INSTRUMENTAL UPGRADE 68 F. Altorfer, E. Clementyev, R. Thut and M. Koch SINQ TIME-OF-FLIGHT SPECTROMETER FOCUS: FIRST YEAR OF OPERATION 69 S. Janssen, C. Beck, J. Mesot, D. Rubio-Temprano, F. Altorfer, A. Furrer, L. Holitzner and R. Hempelmannn THERMAL NEUTRON THREE-AXIS SPECTROMETER TNT 70 B. Roessli and P. Boni 3rd GENERATION SINQ PROJECT: LAUE DIFFRACTOMETER 71 O. Zaharko, J. Schefer and E. Lehmann CREATION AND DECAY OF NUCLEAR POLARIZATION DOMAINS IN HYDROGENEOUS 72 MATERIALS P. Hautle, B. van den Brandt, J.A. Konter, S. Mango, H.B. Stuhrmann and O. Zimmer SAMPLE SYNTHESIS LABORATORY AT LNS 73 K. Conder, P. Allenspach and A. Furrer CONDENSED MATTER THEORY 75 ACOUSTIC PLASMONS AND SUPERCONDUCTIVITY IN LAYERED CONDUCTORS 77 A. Bill, H. Morawitz and V.Z. Kresin Li2Cu02 IN THEORY 78 B. Delley, H.B. Braun, A. Amato and U. Staub SODIUM-NITRO-PRUSSIDE LATTICE VIBRATIONS 79 B. Delley, J. Schefer and Th. Woike SURFACE RELAXATION OF THE HEMATITE (0001) SURFACE 80 B. Delley, A. Chaka and M. Scheffler RANDOM MAGNETIC FLUX PROBLEM IN A QUANTUM WIRE 81 C. Mudry, P.W. Brouwer and A. Furusaki HIGHER ORDER FRACTIONAL QUANTUM HALL STATES 82 R.H. Morf INTERFACE WAVE FUNCTIONS AND ENERGY GAPS OF QUANTUM HALL STATES 83 R.H. Morf, N. d'Ambrumenil and S. Das Sarma CROSS-OVER FROM UNIFORM MAGNETIZATION REVERSAL TO DOMAIN NUCLEATION IN 84 MAGNETIC NANOSTRUCTURES H.B Braun MAGNETIC CORRELATIONS IN NANOSTRUCTURED FERROMAGNETS 85 H.B. Braun, J.F. Loeffler and W. Wagner DIPOLAR INTERACTION IN 2D HONEYCOMB MAGNETS 86 H. B. Braun, B. Roessli and K. Kramer LIST OF PUBLICATIONS 87 INTERNAL REPORTS 94 CONFERENCE, WORKSHOP AND SEMINAR CONTRIBUTIONS 95 FUN SEMINARS AT PSI 104 LECTURES AND COURSES 106 MEMBERS OF SCIENTIFIC COMMITTEES 107 HIGHER DEGREES AWARDED 110 AWARDS RECEIVED 110 GUESTS 111 SINQ USER STATISTICS AND SINQ SCIENTIFIC COMMITTEE 112 STAFF 113 EDITORIAL This year was a period of research topics. The activities on "Multilayers and consolidation of the Surfaces", a basic research object by itself, is however operation at the spallation also to a large extent motivated by the development of source of PSI and its optical components for neutron- and X-ray scientific exploitation at an instrumentation. While most of the solid-state work has increasing number of been done with neutrons, some contributions deal with instruments. The source other probes, like muons and synchrotron light. was in operation from mid- Exploiting the unique possibilities at PSI, to take march until Christmas 99, advantage of the complementary nature of the and received a total different probes is encouraged, in particular for our in- charge of proton beam of house research. nearly 5000 mAh. Initially The theory group on "Condensed Matter Physics" the beam current was carries an important part of the responsibility for the about 0.83 mA; after shortening the meson target in scientific atmosphere at PSI and in particular in the front of the source in autumn the beam transmission department.
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