Tutorial 3 Magnetostatics
... magnitude 2x10-13 N. Determine the angle between the magnetic field and proton’s velocity? Biot- Savart Law Q5. The metal niobium becomes a superconductor with the zero electrical resistance when it is cooled to below 9 K, but its superconductive behavior ceases when the magnetic flux density at its ...
... magnitude 2x10-13 N. Determine the angle between the magnetic field and proton’s velocity? Biot- Savart Law Q5. The metal niobium becomes a superconductor with the zero electrical resistance when it is cooled to below 9 K, but its superconductive behavior ceases when the magnetic flux density at its ...
12/06/05
... •Note that these materials are quite heavily doped! •II-VI materials have been much harder to work with (unable to dope; exchange interaction difficult to control). ...
... •Note that these materials are quite heavily doped! •II-VI materials have been much harder to work with (unable to dope; exchange interaction difficult to control). ...
Today: Oscilloscope and Faraday’s Law
... wire. The resulting current in the coil made it act like a magnet. In other words a current can produce an magnetic field – evidence that electricity and magnetism are ...
... wire. The resulting current in the coil made it act like a magnet. In other words a current can produce an magnetic field – evidence that electricity and magnetism are ...
19.8: Magnetic force between two parallel conductors
... Classical model for electrons in atoms: 1.Orbital motion of electron: like a loop current (but B-field produced by 1 electron can be cancelled out by an oppositely revolving electron in the same atom) 2. “spin” of individual electrons produces much stronger Bfield: each electron itself acts like a m ...
... Classical model for electrons in atoms: 1.Orbital motion of electron: like a loop current (but B-field produced by 1 electron can be cancelled out by an oppositely revolving electron in the same atom) 2. “spin” of individual electrons produces much stronger Bfield: each electron itself acts like a m ...
Putting electrons in motion Electron movement through conductors
... Electrons move at the drift velocity. Resistance is the ratio of voltage applied to current. The ratio is linear for most metals. Resistivity is a material property. Electrical energy will be converted to thermal energy on a resistor. The rate of conversion is the power. ...
... Electrons move at the drift velocity. Resistance is the ratio of voltage applied to current. The ratio is linear for most metals. Resistivity is a material property. Electrical energy will be converted to thermal energy on a resistor. The rate of conversion is the power. ...
Types of Magnetism and Magnetic Domains
... • Ferromagnetic materials become magnetized when the magnetic domains within the material are aligned. • This can be done by placing the material in a strong external magnetic field or by passing electrical current through the material. • Some or all of the domains can become aligned. The more doma ...
... • Ferromagnetic materials become magnetized when the magnetic domains within the material are aligned. • This can be done by placing the material in a strong external magnetic field or by passing electrical current through the material. • Some or all of the domains can become aligned. The more doma ...
Magnetic Properties of TMs So far we have seen that some
... This is a case that involves a spin crossover for the d6 Fe(II) ion. The crossover involves going from high spin S = 2 (t2g4eg2) to low spin S ...
... This is a case that involves a spin crossover for the d6 Fe(II) ion. The crossover involves going from high spin S = 2 (t2g4eg2) to low spin S ...
Zeeman Effect
... Since the distance between the Zeeman sub-levels is proportional to the magnetic field, this effect is used by astronomers to measure the magnetic field of the Sun and other stars. There is also an anomalous Zeeman effect that appears on transitions where the net spin of the electrons is not 0, the ...
... Since the distance between the Zeeman sub-levels is proportional to the magnetic field, this effect is used by astronomers to measure the magnetic field of the Sun and other stars. There is also an anomalous Zeeman effect that appears on transitions where the net spin of the electrons is not 0, the ...
Giant magnetoresistance
Giant magnetoresistance (GMR) is a quantum mechanical magnetoresistance effect observed in thin-film structures composed of alternating ferromagnetic and non-magnetic conductive layers. The 2007 Nobel Prize in Physics was awarded to Albert Fert and Peter Grünberg for the discovery of GMR.The effect is observed as a significant change in the electrical resistance depending on whether the magnetization of adjacent ferromagnetic layers are in a parallel or an antiparallel alignment. The overall resistance is relatively low for parallel alignment and relatively high for antiparallel alignment. The magnetization direction can be controlled, for example, by applying an external magnetic field. The effect is based on the dependence of electron scattering on the spin orientation.The main application of GMR is magnetic field sensors, which are used to read data in hard disk drives, biosensors, microelectromechanical systems (MEMS) and other devices. GMR multilayer structures are also used in magnetoresistive random-access memory (MRAM) as cells that store one bit of information.In literature, the term giant magnetoresistance is sometimes confused with colossal magnetoresistance of ferromagnetic and antiferromagnetic semiconductors, which is not related to the multilayer structure.