Title of PAPER - Department of Physics and Astronomy
... magnetite mineral or electromagnet with a uniform magnetic field as shown in figure 2. Note that it is only the surface which is perpendicular to the field lines that is relevant to the forces generated through induction. As with the Helmholtz coil, any movement within the field is resisted due to i ...
... magnetite mineral or electromagnet with a uniform magnetic field as shown in figure 2. Note that it is only the surface which is perpendicular to the field lines that is relevant to the forces generated through induction. As with the Helmholtz coil, any movement within the field is resisted due to i ...
Lecture 23 ppt
... comes from sum of fields from every electron. • Non-magnetic materials: consists of pairs of electrons spinning in opposite directions, so their fields cancel each other, and there is no net magnetic field. • Magnetic materials: eg iron, nickel, cobalt, not all spins are cancelled out. Eg. each iron ...
... comes from sum of fields from every electron. • Non-magnetic materials: consists of pairs of electrons spinning in opposite directions, so their fields cancel each other, and there is no net magnetic field. • Magnetic materials: eg iron, nickel, cobalt, not all spins are cancelled out. Eg. each iron ...
The Two Level System: Resonance
... Physics) is the study of atomic and molecular systems and their interactions through their resonant interaction with applied oscillating electromagnetic elds. The thrust of these studies has evolved continuously since Rabi performed the rst resonance experiments in 1938. In the decade following Wo ...
... Physics) is the study of atomic and molecular systems and their interactions through their resonant interaction with applied oscillating electromagnetic elds. The thrust of these studies has evolved continuously since Rabi performed the rst resonance experiments in 1938. In the decade following Wo ...
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.