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Article
Open AccessResonant elastic X-ray scattering: Where from? where to?
The International Conference on Anomalous Scattering held in Malente, Germany, in 1992 examined the broad issue of ‘dispersion or resonant scattering’ for X-rays. The significant aspects discussed at that time...
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Article
The chromium spin density wave: magnetic X-ray scattering studies with polarisation analysis
We report on X-ray magnetic diffraction studies of the spin density wave antiferromagnetism formed in the conduction electron band of chromium. Non-resonant X-ray magnetic scattering was used to directly deter...
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Article
Magnetic X-Ray Resonant Scattering from a Dysprosium Epitaxial Film
Magnetic X-Ray resonant scattering performed at the Dysprosium Lni absorption edge permits to study the magnetic behaviour of a 3000Å thick Dy film. The development of an helical magnetic order gives rise to i...
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Article
Spin dynamics by inelastic neutron scattering in YBCO
Key features of Inelastic neutron scattering experiments in YBCO-based cuprates are discussed. We underline the importance of precise oxygen content determination in samples having similar TC as well as the resol...
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Article
X-Ray and neutron scattering studies of YBa2Cu3O6+x compounds: Oxygen insertion and spin dynamics
In the first part of this paper the results of X-ray and neutron diffraction studies of the structural aspects related to oxygen insertion in the CuO x planes of YBa2Cu3O6+x co...
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Article
Magnetism and superconductivity in heavy fermion systems
We discuss some consequences of the interplay between magnetism and superconductivity in the two heavy fermion systems URu2Si2 and UPt3, notably on the temperature dependence of the specific heat, on possible obs...
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Chapter and Conference Paper
Neutron Scattering Investigation of the Spin Dynamics in the High-Temperature Superconducting System YBa2Cu306+x
We report on inelastic neutron scattering experiments carried out on single-crystals of the YBa2Cu3O6+x system. The spin dynamics has been successfully investigated as a function of temperature in the metallic st...
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Article
Soft X-RAY Magnetic Scattering Study of thin Films and Multilayers
A brief discussion of the resonant magnetic scattering process is given. Results from recent studies of thin Fe films and Fe/Gd multilayers are used as examples to demonstrate the information can be obtained a...
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Chapter and Conference Paper
Inelastic Neutron Scattering Study of Spin Dynamics in YBa2Cu3O6+x
The recent results of extensive neutron scattering studies of the spin dynamics in YBa2Cu3O6+x single crystals are reviewed. In the antiferromagnetic region (x=0.15) the spin waves spectrum shows that YBa2Cu3O6+x
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Chapter
Neutron Scattering Study of the Spin Dynamics in YBa2Cu3O6+x
Since the discovery of superconductivity in lamellar copper oxide materials a huge amount of experimental and theoretical works has been performed1 but there is not yet a consensus on the physical mechanism of su...
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Article
The temperature dependence of the methyl rotational potential in methyl iodide under pressure
Inelastic neutron scattering experiments have been performed on CH3I under pressure. The tunnel splitting of the methyl librational groundstate decreases almost exponentially with increasing hydrostatic pressure:...
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Article
Magnetic structures under pressure in cubic heavy-fermion compounds
Neutron diffraction experiments under pressure on the cubic heavy-fermion compounds CeIn3 and CePb3 are reported. Resistivity measurements were performed on CeIn3 in order to study the approach to the magnetic-no...
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Chapter and Conference Paper
Magnetic Fluctuations and Excitations in the S=1 Antiferromagnetic Chains of NENP
In this paper we report experimental results concerning the magnetic properties of the S = 1 antiferromagnetic chain, as observed in the new system Ni (en)2N02C104 (alias NENP). Conventional ideas on the ground s...
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Chapter and Conference Paper
Inelastic Neutron Scattering Study of Methyl Tunnelling in α-Crystallised Toluene
A considerable amount of information was collected over recent years about rotational dynamics of the methyl group in molecular crystals by using principally N.M.R. and neutron scattering techniques. This latt...
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Chapter
Solid State High Pressure Research : X-Ray and Neutron Scattering
A brief account of solid state high pressure physics is presented. Special emphasis is given to investigations by X-ray and neutron scattering.
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Chapter
Singlet Ground State and Combined Electron-Nuclear Magnetism in Praseodymium
Comprehensive neutron scattering1 and magnetisation studies2 have established that the ions in double hcp Pr metal experience a crystalline electric field which splits the 3H4 ground multiplet to produce singlet ...
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Chapter
Magnetic Excitations in TbP under Hydrostatic Pressure
Singlet ground state magnets still attract much attention. In these systems magnetic ordering occurs via the polarization of the ground state, and noticeable dispersion of well defined excitations is expected ...
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Chapter and Conference Paper
Neutron Scattering Study of TTF-TCNQ Under Hydrostatic Pressure up to 5 Kbar
The pressure dependence of the three phase transitions of TTF-TCNQ has been recently mapped from conductivity measurements (1) as shown in fig 1. This phase diagram reveals two pressure ranges of interest:
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Chapter
The Effect of Pressure on the Modulated Phases of TTF-TCNQ
A satellite reflection in the hkO zone of TTF-TCNQ has been measured by neutron scattering at pressures up to 0.46 G.Pa. At 10K the a component of the satellite wavevector changes from 0.25a’ to 0.5 aX at a press...
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Chapter
Pressure Effects and Lattice Parameter Correlations in CEF Split Systems
Many extensive studies have shown that the magnetic behaviour and transport properties of rare earth compounds can be understood by assuming the concept of crystalline electrical field and different types of e...
