Journal Article10.1080/08957959608201414
Neutron powder diffraction studies at high pressure using a pulsed neutron source
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TL;DR: In this paper, the helium-gas pressure system at the Intense Pulsed Neutron Source (IPNS) with the Special Environment Powder Diffractometer (SEPD) was introduced and the results for TIBa2CuO6+8, and La2−x, Srx, CuO4−8 are briefly reviewed.
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Abstract: High-pressure neutron-diffraction experiments using the time-of-flight (TOF) method are presented. We first introduce the helium-gas pressure system at Argonne's Intense Pulsed Neutron Source (IPNS) with the Special Environment Powder Diffractometer (SEPD). The results for TIBa2CuO6+8, and La2−x, Srx, CuO4–8 are briefly reviewed. We then introduce the present situation in Japan. We have been developing a high-pressure system on high-resolution powder diffractometer (HRP) which was much improved recently and renamed VEGA at KEK. The best resolution of 0.45% was obtained at VEGA. The preliminary results for YBa2, Cu4O8, and HgBa2, CuO4+8, are presented and compared with the SEPD data.
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Citations
High-pressure devices
Andrzej Katrusiak
- 01 Jan 2019
TL;DR: In many X-ray, neutron and spectroscopic laboratories throughout the world, the diamond-anvil cell and other high-pressure devices are common as mentioned in this paper, which can reproduce in the laboratory the conditions inside planets and use them to study geological, biological and physical phenomena or for making new materials.
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References
Superconductivity above 130 K in the Hg–Ba–Ca–Cu–O system
TL;DR: In this article, the authors provided support for this conjecture, with the discovery of superconductivity above 130 K in a material containing HgBa2Ca2Cu3O1+x (with three CuO2 layers per unit cell), Hg Ba2CaCu2O6+X (with two O2 layers) and an ordered superstructure comprising a defined sequence of the unit cells of these phases.
1.6K
Low temperature anomalies and pressure effects on the structure and Tc of the superconductor YBa2Cu4O8 (Tc=80 K)
TL;DR: The structure of the 80 K superconductor YBa 2 Cu 4 O 8 has been measured as a function of temperature and pressure between 5 K and 165 K by high resolution neutron powder diffraction as mentioned in this paper.
243
Neutron-diffraction study of Tl 2 Ba 2 CuO 6+δ with various T c 's from 0 to 73 K
TL;DR: In this article, the crystal structures of four pseudotetragonal samples of TlO were refined using Rietveld analysis of time-of-flight neutron-powder-diffraction data.
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Anomalous behavior of the pressure dependence of lattice constants in Tl2Ba2CuO6+x
Hiroki Takahashi,Hiroki Takahashi,James D. Jorgensen,B.A. Hunter,R. L. Hitterman,Shiyou Pei,Fujio Izumi,Yuichi Shimakawa,Yoshimi Kubo,Takashi Manako +9 more
TL;DR: In this article, the authors investigated the crystal structure of Tl 2 Ba 2 CuO 6+ x under high pressure and temperature conditions using neutron powder diffraction and found that the T c at high pressure for this compound depends markedly on whether the sample is pressurized at room temperature or low temperature.
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Chemical crystallography with pulsed neutrons and synchrotron x-rays
Carrondo,G.A. Jeffrey +1 more
- 01 Jan 1987
TL;DR: In this paper, the basic physics of the radiations, their production and their scattering properties explained, together with descriptions of the different types of diffraction experiments which use them, for those scientists who have not yet gained experience in working with such sources.
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