The mysteries of the Earth`s magnetic field and sunspots
... by Raymond Hide, Emeritus Professor of Geophysics at Oxford, ostensibly to do with proving absence of chaos in the dynamics of a particular self-excited dynamo driving a series-wound motor. On meeting Professor Hide and learning the true origin of the problem, in Geodynamo Theory, he was intrigued e ...
... by Raymond Hide, Emeritus Professor of Geophysics at Oxford, ostensibly to do with proving absence of chaos in the dynamics of a particular self-excited dynamo driving a series-wound motor. On meeting Professor Hide and learning the true origin of the problem, in Geodynamo Theory, he was intrigued e ...
Magnetic Field on a Moving Charge
... A dipole is anything that has two opposing sides- positive/negative, north/south. Magnets only come in dipoles. Don’t get confused- we aren’t talking about positive and negative charges when we talk about magnets- we are talking about north and south poles- and one cannot exist without the other (ex ...
... A dipole is anything that has two opposing sides- positive/negative, north/south. Magnets only come in dipoles. Don’t get confused- we aren’t talking about positive and negative charges when we talk about magnets- we are talking about north and south poles- and one cannot exist without the other (ex ...
Magnetic Susceptibility Measurements of Solid Manganese
... units (1, 2)]. All inert gases and most organic compounds are examples of diamagnetic materials. Unlike diamagnetic materials, substances that exhibit superconductivity are only diamagnetic below a certain critical temperature (T c, the transition temperature to the superconducting state). The magni ...
... units (1, 2)]. All inert gases and most organic compounds are examples of diamagnetic materials. Unlike diamagnetic materials, substances that exhibit superconductivity are only diamagnetic below a certain critical temperature (T c, the transition temperature to the superconducting state). The magni ...
Magnetochemistry
Magnetochemistry is concerned with the magnetic properties of chemical compounds. Magnetic properties arise from the spin and orbital angular momentum of the electrons contained in a compound. Compounds are diamagnetic when they contain no unpaired electrons. Molecular compounds that contain one or more unpaired electrons are paramagnetic. The magnitude of the paramagnetism is expressed as an effective magnetic moment, μeff. For first-row transition metals the magnitude of μeff is, to a first approximation, a simple function of the number of unpaired electrons, the spin-only formula. In general, spin-orbit coupling causes μeff to deviate from the spin-only formula. For the heavier transition metals, lanthanides and actinides, spin-orbit coupling cannot be ignored. Exchange interaction can occur in clusters and infinite lattices, resulting in ferromagnetism, antiferromagnetism or ferrimagnetism depending on the relative orientations of the individual spins.