Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, the theory of low lying magnetic excitations of KCoF3 is developed and the parameters describing the magnetic interactions are obtained by comparison with the experimental results of the previous paper.
Abstract: For Pt. I see ibid. vol. 4, 2127. The theory of the low lying magnetic excitations of KCoF3 is developed and the parameters describing the magnetic interactions are obtained by comparison with the experimental results of the previous paper. The branch of the elementary excitation spectrum of lowest frequency is well described by a phenomenological model with an effective spin s'=1/2. The exchange interaction has the Heisenberg form, and the pseudo-dipolar form of anisotropic exchange proposed for KCoF3 is shown to be less than 8% of the isotropic exchange. A model which takes the orbital angular momentum of the Co2+ ion into account is developed by relating the elementary excitations to the quasiboson excitations between the ground state and all eleven excited states of the 4T1 orbital level. This model fits the experimental results for the two branches of lowest frequency extremely well. The interaction between real spins is found to of the Heisenberg form and the spin-orbit coupling constant is found to be 82% of the free ion value. Calculations of the relative intensity of neutron scattering as a function of wavevector transfer for the modes belonging to the two lowest branches of magnetic excitations give good agreement with experiment.
90 citations
TL;DR: In this paper, the stability properties of pyrochlore and fluorite solid solutions were studied using neutron powder diffraction and electron microscopy to determine the stability fields of the compounds.
90 citations
TL;DR: In this paper, the ternary Mg-based hydrogen storage alloys with Al, Fe and Ti as alloying elements were compared to the binary alloys, and it was shown that the properties of the Mg−Al−Ti alloys are significantly worse than those of the binary mg-Al−Fe alloys.
90 citations
TL;DR: Analysis of the experimental data shows that the addition of cholesterol results in a monotonic increase of lipid's transmembrane thickness, lateral area and headgroup hydration, which implies that cholesterol has a pronounced effect on the lipid's hydrocarbon chain organization.
Abstract: The influence of cholesterol on the structure of unilamellar-vesicle (ULV) phospholipid bilayers is studied using small-angle neutron scattering. ULVs made up of short-, mid- and long-chain monounsaturated phospholipids (diCn :1PC, n = 14 , 18, 22, respectively) are examined over a range (0-45mol %) of cholesterol concentrations. Cholesterol's effect on bilayer structure is characterized through changes to the lipid's transmembrane thickness, lateral area and headgroup hydration. For all three lipids, analysis of the experimental data shows that the addition of cholesterol results in a monotonic increase of these parameters. In the case of the short- and mid-chain lipids, this is an expected result, however, such a finding was unexpected for the long-chain lipid. This implies that cholesterol has a pronounced effect on the lipid's hydrocarbon chain organization.
89 citations
TL;DR: The morphology and composition of oxide films formed on type 304 stainless steel surfaces exposed to 300°C water at pH 10 have been examined in this paper, where a correlation was found between oxide film thickness and average crystallite size.
89 citations
Authors
Showing all 2298 results
| Name | H-index | Papers | Citations |
|---|---|---|---|
| Michael D. Guiver | 78 | 288 | 20540 |
| Robert J. Birgeneau | 78 | 587 | 22686 |
| Mike D. Flannigan | 71 | 211 | 21327 |
| Martin T. Dove | 61 | 396 | 14767 |
| Luis Rodrigo | 58 | 341 | 12963 |
| André Longtin | 56 | 260 | 16372 |
| David Mitlin | 56 | 196 | 15479 |
| John Katsaras | 55 | 220 | 9263 |
| John E. Greedan | 55 | 391 | 12171 |
| Gang Li | 48 | 406 | 7713 |
| Matthew G. Tucker | 45 | 224 | 7288 |
| Bruce D. Gaulin | 45 | 284 | 6698 |
| Erick J. Dufourc | 43 | 144 | 5882 |
| Norbert Kučerka | 43 | 119 | 7319 |
| Stephen J. Skinner | 42 | 194 | 8522 |