Neutron Scattering of Magnetic excitations
... Koehler, Woolen, and Wilkinson. Phys. Rev 118, 58 (1960) J. T. Haraldsen et al., Phy. Rev. B. 71, 064403 (2005) M. Zayed, Thesis, Ch. 5 ”Pressure induced quantum phases” (2010) M. Albrecht and F. Mila, Europhys. Lett. 34, 145 (1996) M. Bee, Quasielastic Neutron Scattering: Principles and Application ...
... Koehler, Woolen, and Wilkinson. Phys. Rev 118, 58 (1960) J. T. Haraldsen et al., Phy. Rev. B. 71, 064403 (2005) M. Zayed, Thesis, Ch. 5 ”Pressure induced quantum phases” (2010) M. Albrecht and F. Mila, Europhys. Lett. 34, 145 (1996) M. Bee, Quasielastic Neutron Scattering: Principles and Application ...
Presentation (PowerPoint File)
... – Breaking of magnetic field lines requires resistivity or some other dissipation process • As in fluid systems, dissipation can only be important at small spatial scales • Breaking of field lines occurs at very small spatial scales where the magnetic field reverses dissipation region ...
... – Breaking of magnetic field lines requires resistivity or some other dissipation process • As in fluid systems, dissipation can only be important at small spatial scales • Breaking of field lines occurs at very small spatial scales where the magnetic field reverses dissipation region ...
Magnetism
... • Magnetic forces, like electrical forces, are forces that act at a distance. (Objects do not have to be in contact.) • Like poles repel each other; opposite poles attract. ...
... • Magnetic forces, like electrical forces, are forces that act at a distance. (Objects do not have to be in contact.) • Like poles repel each other; opposite poles attract. ...
Sun: Solar Activities -- Flares, CMEs
... τd: the time scale the magnetic field in size L dissipates away, σ electric conductivity, η magnetic diffusivity, L the magnetic field scale size •In normal coronal condition, τd ~ 1014 s, or 1 million year (assuming L=109 cm, T=106 K, and σ =107T3/2 s-1) •To reduce τd, reduce L to an extremely thin ...
... τd: the time scale the magnetic field in size L dissipates away, σ electric conductivity, η magnetic diffusivity, L the magnetic field scale size •In normal coronal condition, τd ~ 1014 s, or 1 million year (assuming L=109 cm, T=106 K, and σ =107T3/2 s-1) •To reduce τd, reduce L to an extremely thin ...
The magnetic field
... 1. The electric force vector is along the direction of the electric field, whereas the magnetic force vector is perpendicular to the magnetic field. 2. The electric force acts on a charged particle regardless of whether the particle is moving, whereas the magnetic force acts on a charged particle on ...
... 1. The electric force vector is along the direction of the electric field, whereas the magnetic force vector is perpendicular to the magnetic field. 2. The electric force acts on a charged particle regardless of whether the particle is moving, whereas the magnetic force acts on a charged particle on ...
Magnetic monopole
A magnetic monopole is a hypothetical elementary particle in particle physics that is an isolated magnet with only one magnetic pole (a north pole without a south pole or vice versa). In more technical terms, a magnetic monopole would have a net ""magnetic charge"". Modern interest in the concept stems from particle theories, notably the grand unified and superstring theories, which predict their existence.Magnetism in bar magnets and electromagnets does not arise from magnetic monopoles. There is no conclusive experimental evidence that magnetic monopoles exist at all in our universe.Some condensed matter systems contain effective (non-isolated) magnetic monopole quasi-particles, or contain phenomena that are mathematically analogous to magnetic monopoles.