Physica B: Condensed Matter 1992: Vol 180-181 Table of Contents

22 Pages·1992·4.9 MB·English

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