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Full-Text Articles in Physics
Measuring The Equations Of State In A Relaxed Magnetohydrodynamic Plasma, M. Kaur, L. J. Barbano, E. M. Suen-Lewis, J. E. Shrock, A. D. Light, M. R. Brown, David A. Schaffner
Measuring The Equations Of State In A Relaxed Magnetohydrodynamic Plasma, M. Kaur, L. J. Barbano, E. M. Suen-Lewis, J. E. Shrock, A. D. Light, M. R. Brown, David A. Schaffner
Physics Faculty Research and Scholarship
We report measurements of the equations of state of a fully relaxed magnetohydrodynamic (MHD) laboratory plasma. Parcels of magnetized plasma, called Taylor states, are formed in a coaxial magnetized plasma gun, and are allowed to relax and drift into a closed flux conserving volume. Density, ion temperature, and magnetic field are measured as a function of time as the Taylor states compress and heat. The theoretically predicted MHD and double adiabatic equations of state are compared to experimental measurements. We find that the MHD equation of state is inconsistent with our data.
Constraints On Radial Migration In Spiral Galaxies - Ii. Angular Momentum Distribution And Preferential Migration, Kathryne J. Daniel, Rosemary F. G. Wyse
Constraints On Radial Migration In Spiral Galaxies - Ii. Angular Momentum Distribution And Preferential Migration, Kathryne J. Daniel, Rosemary F. G. Wyse
Physics Faculty Research and Scholarship
The orbital angular momentum of individual stars in galactic discs can be permanently changed through torques from transient spiral patterns. Interactions at the corotation resonance dominate these changes and have the further property of conserving orbital circularity. We derived in an earlier paper an analytic criterion that an unperturbed stellar orbit must satisfy in order for such an interaction to occur i.e. for it to be in a trapped orbit around corotation. We here use this criterion in an investigation of how the efficiency of induced radial migration for a population of disc stars varies with the angular momentum distribution …
Constraints On Radial Migration In Spiral Galaxies – Ii. Angular Momentum Distribution And Preferential Migration, Kathryne J. Daniel, Rosemary F. G. Wyse
Constraints On Radial Migration In Spiral Galaxies – Ii. Angular Momentum Distribution And Preferential Migration, Kathryne J. Daniel, Rosemary F. G. Wyse
Physics Faculty Research and Scholarship
The orbital angular momentum of individual stars in galactic discs can be permanently changed through torques from transient spiral patterns. Interactions at the corotation resonance dominate these changes and have the further property of conserving orbital circularity. We derived in an earlier paper an analytic criterion that an unperturbed stellar orbit must satisfy in order for such an interaction to occur, i.e. for it to be in a trapped orbit around corotation. We here use this criterion in an investigation of how the efficiency of induced radial migration for a population of disc stars varies with the angular momentum distribution …
Note: Methyl And T-Butyl Group Rotation In Van Der Waals Solids, Peter A. Beckmann, Arnold L. Rheingold, Jason Schmink
Note: Methyl And T-Butyl Group Rotation In Van Der Waals Solids, Peter A. Beckmann, Arnold L. Rheingold, Jason Schmink
Physics Faculty Research and Scholarship
No abstract provided.
Tuning The Néel Temperature Of Hexagonal Ferrites By Structural Distortion, Kishan Sinha, Haohan Wang, Xiao Wang, Liying Zhou, Yuewei Yin, Wenbin Wang, Xuemei Cheng, David J. Keavney, Huibo Cao, Yaohua Liu, Xifan Wu, Xiaoshan Xu
Tuning The Néel Temperature Of Hexagonal Ferrites By Structural Distortion, Kishan Sinha, Haohan Wang, Xiao Wang, Liying Zhou, Yuewei Yin, Wenbin Wang, Xuemei Cheng, David J. Keavney, Huibo Cao, Yaohua Liu, Xifan Wu, Xiaoshan Xu
Physics Faculty Research and Scholarship
To tune the magnetic properties of hexagonal ferrites, a family of magnetoelectric multiferroic materials, by atomic-scale structural engineering, we studied the effect of structural distortion on the magnetic ordering temperature (TN) in these materials. Using the symmetry analysis, we show that unlike most antiferromagnetic rare-earth transition-metal perovskites, a larger structural distortion leads to a higher TN in hexagonal ferrites and manganites, because the K3 structural distortion induces the three-dimensional magnetic ordering, which is forbidden in the undistorted structure by symmetry. We also revealed a near-linear relation between TN and the tolerance factor and a power-law relation between TN and the …
Proton Spin-Lattice Relaxation In Organic Molecular Solids: Polymorphism And The Dependence On Sample Preparation, Peter A. Beckmann, Jamie Ford, William Paul Malachowski, Andrew R. Mcghie, Curtis E. Moore, Arnold L. Rheingold, Gilbert J. Sloan, Steven T. Szewczyk
Proton Spin-Lattice Relaxation In Organic Molecular Solids: Polymorphism And The Dependence On Sample Preparation, Peter A. Beckmann, Jamie Ford, William Paul Malachowski, Andrew R. Mcghie, Curtis E. Moore, Arnold L. Rheingold, Gilbert J. Sloan, Steven T. Szewczyk
Physics Faculty Research and Scholarship
We report solid‐state nuclear magnetic resonance 1H spin‐lattice relaxation, single‐crystal X‐ray diffraction, powder X‐ray diffraction, field emission scanning electron microscopy, and differential scanning calorimetry in solid samples of 2‐ethylanthracene (EA) and 2‐ethylanthraquinone (EAQ) that have been physically purified in different ways from the same commercial starting compounds. The solid‐state 1H spin‐lattice relaxation is always non‐exponential at high temperatures as expected when CH3 rotation is responsible for the relaxation. The 1H spin‐lattice relaxation experiments are very sensitive to the “several‐molecule” (clusters) structure of these van der Waals molecular solids. In the three differently prepared samples of EAQ, the relaxation also becomes …