Formation of Magnetic Impurities and Pair
... H = −t ∑ ⎡⎣ci†σ c jσ + h.c ⎤⎦ − U ∑ ni↑ ni↓ + ∑ Vi niσ − µ↑ N ↑ − µ↓ N ↓ ...
... H = −t ∑ ⎡⎣ci†σ c jσ + h.c ⎤⎦ − U ∑ ni↑ ni↓ + ∑ Vi niσ − µ↑ N ↑ − µ↓ N ↓ ...
Chapter 1 - Medical applications of physics
... maximum speed of the ship to its original value as it travels past its lowest point. Explain why they should have the ride carefully checked before they do so. ...
... maximum speed of the ship to its original value as it travels past its lowest point. Explain why they should have the ride carefully checked before they do so. ...
User Guide for FMT1000-series Magnetic Field Mapper
... distorted (warped) and causes an error in measured orientation if the magnetometers are used to estimate orientation. This is not the case in all filter profiles. However, the disturbance of the magnetic field caused by mounting the FMT on a ferromagnetic object can be corrected for using a speciali ...
... distorted (warped) and causes an error in measured orientation if the magnetometers are used to estimate orientation. This is not the case in all filter profiles. However, the disturbance of the magnetic field caused by mounting the FMT on a ferromagnetic object can be corrected for using a speciali ...
Skin effects in metals in a perpendicular magnetic field
... It is shown in the present paper that the situation can be different in uncompensated metals with anisotropic Fermi surfaces. In the case of certain orientations of the vector H relative to the crystallographic axes, a number of such metals reveal a rapid change in the surface impedance in fields mu ...
... It is shown in the present paper that the situation can be different in uncompensated metals with anisotropic Fermi surfaces. In the case of certain orientations of the vector H relative to the crystallographic axes, a number of such metals reveal a rapid change in the surface impedance in fields mu ...
Local Magnetic Actuation for Obese and Pediatric Patients
... »» Because of the limited space and desire to minimize incision, instruments used in MIS procedures have very little mobility »» Traditional MIS devices require a direct, continuous line of access from the surgeon’s hand to the operation site within the body, increasing the number of necessary incis ...
... »» Because of the limited space and desire to minimize incision, instruments used in MIS procedures have very little mobility »» Traditional MIS devices require a direct, continuous line of access from the surgeon’s hand to the operation site within the body, increasing the number of necessary incis ...
Magnetized Plasma for Reconfigurable Subdiffraction Imaging Shuang Zhang, Yi Xiong, Guy Bartal,
... increases, the electromagnetic waves start to exhibit almost diffractionless propagation and are confined in narrow beams with deep subwavelength width. This can be attributed to a flatter EFC at higher magnetic field (Fig. 1). A standing wave pattern is formed along the propagation due to the imped ...
... increases, the electromagnetic waves start to exhibit almost diffractionless propagation and are confined in narrow beams with deep subwavelength width. This can be attributed to a flatter EFC at higher magnetic field (Fig. 1). A standing wave pattern is formed along the propagation due to the imped ...
Chapter 10 Faraday’s Law of Induction
... a repulsive force due to the induced emf. Since like poles repel, the loop must behave as if it were a bar magnet with its north pole pointing up. Using the right-hand rule, the direction of the induced current is counterclockwise, as view from above. Figure 10.1.8(b) illustrates how this alternati ...
... a repulsive force due to the induced emf. Since like poles repel, the loop must behave as if it were a bar magnet with its north pole pointing up. Using the right-hand rule, the direction of the induced current is counterclockwise, as view from above. Figure 10.1.8(b) illustrates how this alternati ...
Electromagnet
An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. The magnetic field disappears when the current is turned off. Electromagnets usually consist of a large number of closely spaced turns of wire that create the magnetic field. The wire turns are often wound around a magnetic core made from a ferromagnetic or ferrimagnetic material such as iron; the magnetic core concentrates the magnetic flux and makes a more powerful magnet.The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. However, unlike a permanent magnet that needs no power, an electromagnet requires a continuous supply of current to maintain the magnetic field.Electromagnets are widely used as components of other electrical devices, such as motors, generators, relays, loudspeakers, hard disks, MRI machines, scientific instruments, and magnetic separation equipment. Electromagnets are also employed in industry for picking up and moving heavy iron objects such as scrap iron and steel.