Contents Preface Vii List of committees Viil Conference photograph 1X PART A Chapter 1. Plenary papers Magnetic structures and excitations in rare earth metals: old problems and new solutions A.R. Mackintosh and J. Jensen 1 Neutron spin echo investigations on molecular motion in polymers D. Richter 7 Static and dynamic spin fluctuations in the spin glass doping regime in La,_,Sr,CuO,,; R.J. Birgeneau, N. Belk, Y. Endoh, R.W. Erwin, M.A. Kastner, B. Keimer and G. Shirane 15 Phase transitions: experimental problems R.A. Cowley 21 Chapter 2. Magnetic structures Low temperature magnetic phases of neodymium alloys S.W. Zochowski, W.G. Marshall, K.A. McEwen, E.M. Forgan, D. Fort and S. Shaikh 26 The phase diagram and the magnetic structure of nuclear spins in elemental copper below 60 nK K. Siemensmeyer, M. Steiner, H. Weinfurther, K.N. Clausen, P.A. Lindgard, A.J. Annila, O.V. Lounasmaa, A.S. Oja and J.T. Tuoriniemi 29 Neutron diffraction experiments in a pulsed high magnetic field H. Nojiri, M. Motokawa, N. Nishida and Y. Endoh 31 Neutron depolarization studies on mesoscopic magnetism Y. Endoh, S. Itoh, T. Watanabe and S. Mitsuda 34 Magnetic properties of 3D-metal superlattices and multilayers: a neutron diffraction study J.L. Martinez 39 The magnetic phase diagram of UNi,Si, L. Rebelsky, H. Lin, M.W. McElfresh, M.F. Collins, J.D. Garrett, W.J.L. Buyers and M.S. Torikachvili Contents Neutron diffraction studies of pressure effects on magnetic structures of Tb S. Kawano, N. Achiwa, A. Onodera and Y. Nakai 46 Order in commercial grain-oriented iron-silicon sheets E. Nembach, K. Hilfrich, Th. Ebel and O. Scharpf 49 Recent advances in the R,Cu,O, (R = rare earth) systems: neutron diffraction and neutron spectroscopy studies A. Murasik, P. Fischer, A. Furrer, R. Tro¢ and Z. Bukowski 51 Magnetic phase diagram of the U(Ni,_,Cu,),Ge, system M. Kuznietz, H. Pinto, H. Ettedgui and M. Melamud Ba Long period commensurability in the magnetic structures of PrGa, and NdGa, A.R. Ball, D. Gignoux and D. Schmitt 58 Percolation like behaviour in amorphous spin glasses Mn,Ca,_,Al,(SiO,), K. Hinrichs, Th. Bruckel, K. Knorr and W. Prandl 61 Quasielastic neutron scattering in dilute PtFe and PtCo alloys R.E. Parra and A.C. Gonzalez 65 The incommensurate magnetic structure of TbAsO, analysed by profile fitting W. Kockelmann, W. Schafer and G. Will 68 Spin correlations in MnS, T. Chattopadhyay, Th. Bruckel and P. Burlet 71 Localized and itinerant f electrons in concentrated spin glass systems: Mossbauer, magneti- zation and neutron diffraction studies W. Schafer, G. Will, W. Potzel, G.M. Kalvius, I. Yaar, E. Arbaboff and J. Gal 73 Polarized neutron diffraction study of the spin density distribution in an indolinonic nitroxide radical R. Caciuffo, O. Francescangeli, L. Greci, S. Melone, B. Gillon and G. Amoretti 76 The 27 satellites in holmium near the Néel point D.A. Tindall, M.O. Steinitz and D.R. Noakes 79 Two-step metamagnetism in TbRu,Si, T. Shigeoka, S. Kawano, N. Iwata and H. Fujii 82 The 3d Mn magnetism instability in TbMn, B. Ouladdiaf, J. Deportes, R.M. Galera, A.S. Markosyan and J.L. Soubeyroux 85 Critical scattering measurements on neptunium arsenide D.L. Jones, S. Langridge, W.G. Stirling, G.H. Lander, J. Rebizant, J.C. Spirlet, M. Alba and O. Vogt 88 Moment directions in the antiferromagnetic 4-q phase of neodymium E.P. Gibbons, E.M. Forgan, S.L. Lee, K.A. McEwen, W.G. Marshall and D. Fort 91 Phase diagram of a Heisenberg-like spin glass Ni,Mn,_,TiO, H. Yoshizawa, H. Kawano, H. Mori, S. Mitsuda and A. Ito xil Contents Cation distribution and oxidation states in nickel manganites NiMn,O, and Ni, .Mn, ,O, from powder neutron diffraction J.L. Baudour, F. Bouree, M.A. Fremy, R. Legros, A. Rousset and B. Gillot 97 Magnetic structures of the orthorhombic GdNi,_,Cu, compounds J.A. Blanco, D. Gignoux, J.C. Gomez Sal, J. Rodriguez Carvajal, J. Rodriguez Fernandez and D. Schmitt 100 Neutron scattering study of magnetic correlations in nanostructured Fe W. Wagner, P. Boni, A. Wiedenmann and W. Petry 105 Pressure dependence of the magnetic order in YMn, and TbMn, S. Mondal, R. Cywinski, S.H. Kilcoyne, B.D. Rainford and C. Ritter 108 Evolution of magnetic correlations in Fe-substituted TbMn, S. Mondal, S.H. Kilcoyne, B.D. Rainford and R. Cywinski 111 Investigation of ZnMnTe weakly diluted FCC magnetic semiconductor P. Ktosowski, T.M. Giebultowicz, N. Samarth, H. Luo, J.K. Furdyna and J.J. Rhyne 114 Investigation of the unusual magnetic spiral arrangement in BiFeO, I. Sosnowska, M. Loewenhaupt, W.I.F. David and R.M. Ibberson 117 Neutron powder diffraction study of Ho,In D. Ravot, F. Bouree and T. Roisnel 119 Low temperature phase and magnetic ordering in Pr,NiO, M.T. Fernandez-Diaz J. Rodriguez-Carvajal, J.L. Martinez and P. Odier 122 Neutron powder diffraction experiments on AMnF, (A=K, Rb): nuclear and magnetic structures M.C. Moron, F. Palacio and J. Rodriguez-Carvajal 125 Antiferromagnetic phase stability by Nd**-Cu** interplanar coupling in Nd,CuO, Ph. Bourges, L. Boudarene and D. Petitgrand 128 Neutron diffraction study of the magnetic ordering in NpBi P. Burlet, F. Bourdarot, J. Rossat-Mignod, J.P. Sanchez, J.C. Spirlet, J. Rebizant and O. Vogt 131 Magnetic ground state of yttrium iron garnets A. Koper, A. Lehmann—Szweykowska and R. Wojciechowski 133 Spin densities and magnetic coupling in copper-nitronyl nitroxide compounds J.X. Boucherle, B. Gillon, E. Ressouche, P. Rey and J. Schweizer 135 Magnetic ordering in praseodymium alloys M. Ellerby, K.A. McEwen and L. Needham 139 Non-collinear structures induced by a magnetic field on Ce,Sn,: polarized versus non- polarized neutron study G. Fillion, F. Givord, P. Lejay, E. Ressouche, J. Schweizer and A. Stunault 142 The magnetic structure of the Heusler alloy Pd,_.Ag,MnIn I.K. Jassim, K.-U. Neumann, D. Visser, P.J. Webster and K.R.A. Ziebeck Contents Chapter 3. Magnetic excitations Spin waves in KFeS, on the chopper spectrometer MARI D. Welz, M. Arai, M. Nishi, M. Kohgi and Y. Endoh 147 Neutron inelastic experiments on actinide dioxides. Search for crystal field excitations R. Caciuffo, G. Amoretti, A. Blaise, J.M. Fournier, M.T. Hutchings, G.H. Lander, R. Osborn, A. Severing and A.D. Taylor 149 Magnetic excitations in quasi one-dimensional antiferromagnets K. Kakurai 153 Spin waves in the ferrimagnetic and ferromagnetic phases of thulium U. Steigenberger, K.A. McEwen, J.L. Martinez and J. Jensen 158 Neutron scattering study of Rb,Cu,_,Co,F,: a two-dimensional randomly mixed ferro- magnet-antiferromagnet A.G. Schins, M. Nielsen, A.F.M. Arts and H.W. de Wijn 161 Excitations in the one-spin-slip phase of holmium D.F. McMorrow, C. Patterson, H. Godfrin and D.A. Jehan 165 Inelastic magnetic neutron scattering study of amorphous to crystal transition for PrNi, P.A. Alekseev, V.N. Lazukov, V.G. Orlov, I.P. Sadikov and J.-B. Suck 167 Transfer matrix method for the planar linear chain in an external magnetic field B. Carazza, E. Rastelli and A. Tassi 170 Crystalline electric field in the Ce(Zn,_,Cu,), system P. Morin, D. Gignoux, J. Voiron and A.P. Murani 173 Crystal field excitations in dilute rare earth noble metal alloys W. Hahn, M. Loewenhaupt and B. Frick 176 Spin fluctuations in the paramagnetic phase of Cr and Cr(V) alloys E. Fawcett 179 Theory of magnetic neutron spectroscopy of praseodymium E. Balcar and S.W. Lovesey 182 Critical spin dynamics of the planar two-dimensional compound BaNi,(PO,), A. Bouvet, L.P. Regnault and J. Rossat-Mignod 185 Field dependences of Haldane gaps in the S$ = 1 one-dimensional antiferromagnet NENP L.P. Regnault, C. Vettier, J. Rossat-Mignod and J.P. Renard 188 Spin relaxation and CF-splitting in the heavy fermion system CePtSi A. Krimmel, A. Severing, A. Murani, A. Grauel and S. Horn 19] Magnetic excitations in monodomain ferromagnetic USb, ,Te, 5 S. Langridge, W.G. Stirling, G.H. Lander and O. Vogt 194 Magnetic correlations in the $=1 quasi-one-dimensional Heisenberg antiferromagnet AgvP,S, H. Mutka, C. Payen, P. Molinié, J.L. Soubeyroux, P. Colombet and A.D. Taylor XiV Contents Search for intermultiplet transitions in USb D.L. Jones, W.G. Stirling, G.H. Lander, R. Osborn, A.D. Taylor, K. Mattenberger and O. Vogt 199 The commensurate spin excitation in chromium: a polarised neutron investigation R. Pynn, W.G. Stirling and A. Severing 203 Inelastic neutron scattering of the mixed dimer YbDyBr,_ M.A. Aebersold, H.U. Gudel, A. Furrer and H. Blank 206 Spin waves in a re-entrant spin glass Fe,Mn,_,TiO, H. Yoshizawa, H. Mori, S. Mitsuda, H. Aruga, H. Kawano, S. Ebii and A. Ito 209 Single-crystal investigation of the chain antiferromagnet TlFeS, D. Welz and M. Nishi 211 Maximum entropy analysis of dipolar anisotropic magnetic scattering above 7, in EuS D. Gorlitz, J. Kotzler, F.J. Bermejo, P. Boni and J.L. Martinez 214 Magnetic excitations in CeNi,Pt,_, ferromagnetic Kondo lattice compounds J.A. Blanco, J.C. Go6mez Sal, J. Rodriguez Fernandez, J. Sandonis and J.M. Barandiaran 217 Spin fluctuations in Ni above 7;.: comparison with RG P. Boni, G. Shirane, J.L. Martinez and H.A. Mook 219 Haldane gap in RbNiCI, W.J.L. Buyers, Z. Tun, A. Harrison, J.A. Rayne and R.M. Nicklow 222 Spin waves in the quasi two-dimensional antiferromagnet KFeF, S. Fulton, S.E. Nagler, R.A. Cowley and L.M.N. Needham Fed e Magnetic excitations in Mn,Pt S. Tomiyoshi, T. Kaneko, U. Steigenberger, A.J. Chapell, M. Hagen and Y. Todate 227 A SANS study of the magnetic phase transition in amorphous (Fe,Ni,_ ,)7,B,,)Si,> A.C. Hannon, M. Hagen, R.A. Cowley, H.B. Stanley and N. Cowlam 230 Eigenvectors in the Haldane system CsNiCl, M. Enderle, K. Kakurai, M. Steiner and B. Dorner 233 Magnons in two magnetic phases of Mn,Pt Y. Yamaguchi, H. Yasui, S. Funahashi, M. Yamada, M. Ohashi and T. Kaneko 235 Magnetic excitations in an exchange-coupled tetramer cluster of cobalt(II): a study by inelastic neutron scattering C.J. Gomez-Garcia, E. Coronado, J.J. Borras-Almenar, M. Aebersold, H.U. Gudel and H. Mutka 238 Vortex signature in spin dynamics of a quasi two-dimensional ferromagnet F. Moussa, M. Ain and B. Hennion 241 Crystal structure and magnetic interactions in CdCr,S,: a simple insulating ferromagnet S. Pouget, M. Alba, N. Fanjat and M. Nogues Contents Temperature dependence of spin wave parameters in a single domain y-Mn(10%Fe, 3%Cu) alloy K. Mikke, J. Jankowska-Kisielinska and E. Jaworska 247 Anomalous crystal field splitting in YbN K. Ohoyama, M. Kohgi, T. Nakane, M. Arai, A.D. Taylor, A.O yamada and T. Suzuki 250 Polarization analysis of the magnetic excitations in Invar Fe,,.B,, J.W. Lynn, N. Rosov, Q. Lin, C.-H. Lee and G. Fish 253 Neutron magnetic scattering from UPb, W.G. Marshall, K.A. McEwen and D. Fort 256 The dynamic critical scattering of a two-dimensional planar ferromagnet, Rb,CrCl, S.T. Bramwell, M.T. Hutchings and B. Fak 259 Study of spin waves in amorphous ferromagnet Fe.,Ni,,Cr,)P,, by small angle polarized neutron scattering V. Deriglazov, A. Okorokov, V. Runov, B. Toperverg, R. Kampmann, H. Eckerlebe, W. Schmidt and W. Lobner 262 Chapter 4. Structural excitations and phase transitions Structural excitations and phase transformation B. Dorner 265 Neutron investigation of the premartensitic behaviour of lithium single crystals W. Schwarz and O. Blaschko 271 Polarization fluctuations and transverse acoustic modes in a Rb,_,(NH,),H,PO, glass F. Moussa and E. Courtens 273 Orientational order—disorder phase transition in calcite M. Hagen, M.T. Dove, M.J. Harris, U. Steigenberger and B.M. Powell 276 Structural correspondence across the pressure-induced B1—B 2 transition in RbCl A. Onodera, S. Kawano, Y. Nakai and N. Achiwa 279 Temperature effects in phonon dispersion of SmB, intermediate valence semicon- ductor P.A. Alekseev, A.S. Ivanov, V.N. Lazukov, I.P. Sadikov and A. Severing 281 Strong anharmonic H(D) vibrations in the 6-phase of titanium hydride: observation of bound multiphonon states A.I. Kolesnikov, I.O. Bashkin, V.Yu. Malyshev, E.G. Ponyatovsky, M. Prager and J. Tomkinson 284 Phase transitions and space- and time-dependent correlations in a non-equilibrium system T. Riste and K. Otnes 287 Neutron diffraction and ultrasonic measurements on holmium at the b=2 spin-slip structure A.M. Venter, P. de V. du Plessis and E. Fawcett XVi Contents Ground- and light-induced metastable states of sodiumnitroprusside M. Rudlinger, J. Schefer, T. Vogt, T. Woike, S. Haussuhl and H. Zollner 293 Interacting elastic dipoles: incommensurability and ground state structures in Jahn-Teller compounds U. Schotte, H.A. Graf, F. Kubanek, J. Grybos and D. Schotte 299 Inelastic scattering and elastic diffuse scattering from the shape-memory alloy B’-Cu—Zn M. Zolliker, W. Buhrer and B. Schonfeld 303 Electronically induced structural anomalies across the metal—insulator transition in RNiO, (R = Pr, Nd) J.L. Garcia-Munoz, J. Rodriguez-Carvajal and P. Lacorre 306 Neutron diffraction study of the low temperature domain structure in LiKSO, B.N. Savenko, D.A. Keen, B. Mroz, D. Sangaa and C.C. Wilson 309 Low energy modes in OH_ doped KBr investigated by inelastic neutron scattering G. Chiarotti, C. Petrillo and A. Scacco Sid Kinetics of decomposition in the system AgBr—NaBr G. Eckold and D. Trzeciok 315 Real-time neutron scattering study of phase transitions between modulated structures of TMATC-Zn G. Eckold and K. Parlinski 318 Phonon softening in UO, P. de V. du Plessis, G.H. Lander, A.M. Strydom and B. Fak 321 The influence of an external electric field on the incommensurate phase of quartz J. Bethke and G. Eckold 323 Scaling of critical scattering in B-CuZn C. Lamers and W. Schweika 326 The magnetic and structural transitions in CrN and (CrMo)N R.M. Ibberson and R. Cywinski 329 Study of the mode softening in NbSe,—-2H C. Ayache, R. Currat and P. Molinié Sao Proton disorder and phase transition in KHCO, G. Eckold, H. Grimm and M. Stein-Arsic 336 Neutron study of the structural transition in a polymerizable crystal, pTS—D J. Even, H. Cailleau, B. Toudic, M. Bertault, F. Moussa and R. Currat 339 Incoherent neutron scattering around displacive incommensurate structural phase transi- tions J. Etrillard, B. Toudic, H. Cailleau, M.H. Lemée-Cailleau, G. Coddens and W. Petry 342 Neutron spin echo study of NaNO, in the incommensurate phase D. Durand, R. Papoular, R. Currat, M. Lambert, J.F. Legrand and F. Mezei Contents Neutron scattering study of the electron—phonon interaction in superconducting niobium A.T. Boothroyd, W.G. Stirling, R. Currat, N.R. Bernhoeft, D.McK. Paul and S.I. Shihub 348 Phase transition of RbCN P. Bourson, A. Ndtoungou, J. Bouillot, J.L. Soubeyroux and D. Durand 351 Structural transformation in Tb, Y,, C u M.R. Ibarra, C. Marquina, O. Moze, R.M. Ibberson, A.S. Pavlovic and C. Ritter 354 Investigation of the nucleation stage in a Cu—0.8at%Co alloy by means of polarized neutron scattering T. Ebel, R. Kampmann and R. Wagner 357 Unusual critical dynamics in AuFe re-entrant ferromagnets C. Lartigue, F. Mezei, C. Pappas and M. Alba 359 Change of magnetic short range order at metal—insulator phase transition F. Mezei, P. Canfield and O. Scharpf 361 Phonons in the BCC phase of Sc J. Trampenau, W. Petry and A. Heiming 363 Magnetic neutron white beam diffraction through phase transitions in MnRhAs J.-Cl. Marmeggi, M. Bacmann, B. Chenevier and D. Fruchart 366 Chapter 5. High temperature superconductivity Limits to T. in oxide superconductors studied by neutron powder diffraction A.W. Hewat 369 Superstructures in YBa,Cu,O,,, compounds by neutron and X-ray diffraction R. Sonntag, Th. Zeiske and D. Hohlwein 374 Neutron diffraction by the flux lattice in high- 7. superconductors R. Cubitt, E.M. Forgan, D.McK. Paul, S.L. Lee, J.S. Abell, H. Mook and P.A. Timmins 377 Observation of incommensurate two-dimensional magnetic correlations in La, Sry ,NiO, P.J. Brown, S.M. Hayden, G.H. Lander, J. Zaretsky, C. Stassis, P. Metcalf and J.M. Honig 380 Spin dynamics in the high-T. system YBa,Cu,O,, , J. Rossat-Mignod, L.P. Regnault, C. Vettier, P. Bourges, P. Burlet, J. Bossy, J.Y. Henry and G. Lapertot 383 Neutron spectroscopy of Nd,_,,,Ca,Ba,_,Cu,,,O, P. Allenspach, J. Mesot, U. Staub, A. Furrer, H. Blank, H. Mutka, R. Osborn, A. Taylor, H. Maletta, M.J. Kramer, S.I. Yoo, E. Kaldis, J. Karpinski and S. Rusiecki 389 Phonon softening in ceramic superconductors K. Prassides, M.J. Rosseinsky, A.J. Dianoux and P. Day XVill Contents Crystal structures and long-range antiferromagnetic ordering in REBa,Cu,O0,_; (RE = Yb, Nd) B. Roessli, P. Allenspach, P. Fischer, J. Mesot, U. Staub, H. Maletta, P. Bruesch, C. Ritter and A.W. Hewat 396 Oxygen vacancy ordering in La,_,Sr,NiO,_; M. Medarde, J. Rodriguez-Carvajal, X. Obradors, M. Vallet-Regi, J.M. Gonzalez- Calbet and M.J. Sayagués 399 Spin reorientations in Nd, ,Sry ,NiO; , M. Medarde, J. Rodriguez-Carvajal, X. Obradors, M. Vallet-Regi, J.M. Gonzalez- Calbet and J. Alonso 402 Charge transfer redistribution in ErBa,Cu,O,,, determined by neutron crystal field spectroscopy J. Mesot, P. Allenspach, U. Staub, A. Furrer, H. Mutka, R. Osborn and S. Bennington 405 Antiferromagnetic order and hole doping in the T’ phases Nd,_,Sr,CuO,_, M.J. Rosseinsky and K. Prassides 408 Antiferromagnetic ordering in (Sr, Ba),CuO,(CO,) A. Lappas, A.R. Armstrong, K. Prassides and P.P. Edwards 411 Neutron diffraction investigation of structures of ‘RE124 (RE = Dy, Ho, Er) and ‘Nd247’ superconductors; 2D antiferromagnetism in ‘Dy124 P. Fischer, B. Roessli, J. Mesot, P. Allenspach, U. Staub, E. Kaldis, B. Bucher, J. 414 Karpinski, S. Rusiecki, E. Jilek and A.W. Hewat Neutron spectroscopy and diffraction studies of the high-7. superconductor HoBa,Cu,O, U. Staub, P. Allenspach, J. Mesot, A. Furrer, H. Blank and H. Mutka 417 Magnetic excitations and spin correlations in CuO T. Chattopadhyay, G.J. McIntyre, C. Vettier, P.J. Brown and J.B. Forsyth 420 Site selectivity in 3d transition metal substituted YBa,Cu,O, S.H. Kilcoyne, S.J. Hibble and R. Cywinski 423 Kinetic neutron studies of the recrystallisation of amorphous Bi-Sr—Ca—Cu—O C.J. Boardman, S.H. Kilcoyne and R. Cywinski 426 Stability of 4-year-old YBa,Cu,O,_, A. Sequeira, H. Rajagopal, P.V.P.S.S. Sastry, J.V. Yakhmi, R.M. Iyer and B.A. Dasannacharya 429 Phonon density of states of super and non-superconducting states in La, ,;Sry ,;Cu,_,- Zn,O, (x = 0, 0.02) M. Arai, K. Yamada, A.D. Taylor, Y. Endoh and Y. Hidaka 432 Study of the mixed state of YBa,Cu,O,,, SnMo,S, superconducting ceramics and Bi,Sr,CaCu,QO, textured polycrystals by neutron depolarization N.K. Zhuchenko, R.P. Dmitriev, R.Z. Jagood, M.P. Volkov and E.I. Leyarovski Symmetry changes at the metamagnetic phase transition in the high-7,. superconductor GdBa,Cu,O, K. Osuch Contents Iron spin fluctuations in the orthorhombic phase of YBa,(Cu,_,Fe,),O,: an inelastic neutron scattering study M. Hennion, I. Mirebeau, L. Boudarene, C. Bellouard, G. Jehanno, A.J. Dianoux and V. Caignaert 440 Diffuse neutron scattering studies of disorder in high- 7. superconductors R.L. McGreevy, L. Borjesson, L.M. Torell and W.S. Howells 443 Two-dimensional antiferromagnetic excitations in Nd,CuO,, crystal P. Bourges, L. Boudarene, D. Petitgrand and P. Galez 447 Electron—phonon coupling in HTC superconductors evidenced by inelastic neutron scat- tering B. Renker, F. Gompf, P. Adelmann, Th. Wolf, H. Mutka and A. Dianoux 450 Polarized neutron diffraction by a flux line lattice in anisotropic superconductors N.K. Zhuchenko 453 Investigation of magnetic structure in R,CuO, (R=La, Sr, Nd, Ce, Eu) by polarized neu- trons A.G. Gukasov, S.Yu. Kokovin, V.P. Plakhty, I.A. Zobkalo, S.N. Barilo and D.I. Zhigunov 455 Strong changes in the phonon density of states for Li,,,Ti,_,.O, when going from x = 0 (superconductor) to x = 3 (insulator) F. Gompf, B. Renker and H. Mutka 459 Chapter 6. Surfaces and interfaces The application of specular neutron reflection to the study of surfaces and interfaces J. Penfold 462 Using neutrons to explore surface roughness R. Pynn, W.A. Hamilton and G.S. Smith 465 The effect of a diblock copolymer compatibiliser on the interface between immiscible polymers D.G. Bucknall, J.S. Higgins and J. Penfold 468 Some applications of low angle neutron scattering to hydrogenated amorphous silicon multilayers M. Vergnat, S. Houssaini, G. Marchal, Ph. Mangin and C. Vettier 471 Surface melting on methane (111): a neutron diffraction study of surface disordering of methane thin films adsorbed on graphite J.M. Gay and J.M. Kang 474 Neutron scattering evidence for antiferromagnetic coupling in Ag/Ni superlattices 477 B. Rodmacq, Ph. Mangin, M. Hennion and R.W. Erwin Neutron reflectivity study on thin film polymer surface S. Tasaki, H. Yamaoka and F. Yoshida