Anomalously high charge/orbital ordering
... First indications for the presence of CO at high temperatures were seen in the susceptibility data. Figure 1 presents the inverse of the susceptibility of Bi0.5 Ca0.5 MnO3 and Bi0.5 Sr0.5 MnO3 measured under 1 T of applied field up to 800 K. CO/OO transition produces a peak in χ −1 (T ) curves. This ...
... First indications for the presence of CO at high temperatures were seen in the susceptibility data. Figure 1 presents the inverse of the susceptibility of Bi0.5 Ca0.5 MnO3 and Bi0.5 Sr0.5 MnO3 measured under 1 T of applied field up to 800 K. CO/OO transition produces a peak in χ −1 (T ) curves. This ...
Permanent magnets - KCPE-KCSE
... through the molten outer core of the Earth. At the present the field pattern is like that with a magnetic SOUTH pole situated somewhere below northern Greenland ...
... through the molten outer core of the Earth. At the present the field pattern is like that with a magnetic SOUTH pole situated somewhere below northern Greenland ...
Ch 17 Introduction to electricity
... No matter how many times you cut the magnet, it will continue to have 2 poles ...
... No matter how many times you cut the magnet, it will continue to have 2 poles ...
m eB 2 / m eB π / mr eB π
... dielectric material of constant K. The plates are connected in series with a variable resistance R and a power supply of potential difference V. The capacitance C of this capacitor will increase if which of the following is decreased? (A) A (B) R (C) K (D) d (E) V ...
... dielectric material of constant K. The plates are connected in series with a variable resistance R and a power supply of potential difference V. The capacitance C of this capacitor will increase if which of the following is decreased? (A) A (B) R (C) K (D) d (E) V ...
Magnetism
... the North Star, Polaris). This star is also called the leading star, or lodestar. For this reason, magnetic rocks are known as lodestones. ...
... the North Star, Polaris). This star is also called the leading star, or lodestar. For this reason, magnetic rocks are known as lodestones. ...
Slide 1
... The energy separating shells becomes smaller with increasing n. Electrons in lower angular momentum states penetrate shielding more, and thus are more tightly bound. As the energy levels become closer together, some lower angular momentum states of higher n may actually have a lower energy. ...
... The energy separating shells becomes smaller with increasing n. Electrons in lower angular momentum states penetrate shielding more, and thus are more tightly bound. As the energy levels become closer together, some lower angular momentum states of higher n may actually have a lower energy. ...
Forces on Current Carrying Wires in Magnetic Fields
... The two opposing forces will produce a torque Note that the Force will be the greatest when B is parallel to the plane of the loop! Why? Because when it is parallel to the rectangular loop part of the loop will be parallel to the magnetic field but the ...
... The two opposing forces will produce a torque Note that the Force will be the greatest when B is parallel to the plane of the loop! Why? Because when it is parallel to the rectangular loop part of the loop will be parallel to the magnetic field but the ...
Measurement of Weak Magnetic Fields
... surface of ferromagnetic layer is very low, lower than the induction of the Earth’s magnetic field. To obtain a signal whose level would make it applicable, the coil surface would have to be large, which is in contradiction with the demand for low dispersion. Common detectors of weak magnetic fields ...
... surface of ferromagnetic layer is very low, lower than the induction of the Earth’s magnetic field. To obtain a signal whose level would make it applicable, the coil surface would have to be large, which is in contradiction with the demand for low dispersion. Common detectors of weak magnetic fields ...
Magnetic Torch - (EU
... Will the flashlight work if the magnet is outside of the test-tube? For example, a magnet dropped in the direction perpendicular to the flashlight axis fails to cause the diode to glow. But if dropped so that it falls close to the test-tube, parallel to its axis, the flashlight should shine for a mo ...
... Will the flashlight work if the magnet is outside of the test-tube? For example, a magnet dropped in the direction perpendicular to the flashlight axis fails to cause the diode to glow. But if dropped so that it falls close to the test-tube, parallel to its axis, the flashlight should shine for a mo ...
Magnetism and Electricity
... current flows from north to south, then north of needle points towards : (i) east ...
... current flows from north to south, then north of needle points towards : (i) east ...
Document
... ・ However most models ignore the effect of turbulent flow by modeling in static. This is likely for strong magnetic field case. But for weak field case, the influence of convection can not be ignored. ・ In this paper we perform a large number of three dimensional MHD simulations of magnetic flux rop ...
... ・ However most models ignore the effect of turbulent flow by modeling in static. This is likely for strong magnetic field case. But for weak field case, the influence of convection can not be ignored. ・ In this paper we perform a large number of three dimensional MHD simulations of magnetic flux rop ...
Lab #6
... detect the absorption of electromagnetic energy (= hf) by electrons changing their spin state. This will give you a direct measure of the of the electron. Since the natural response frequency of the system (the frequency that the electrons absorb) equals the applied frequency (of the oscillating E ...
... detect the absorption of electromagnetic energy (= hf) by electrons changing their spin state. This will give you a direct measure of the of the electron. Since the natural response frequency of the system (the frequency that the electrons absorb) equals the applied frequency (of the oscillating E ...
Exam1, 1402, Summer II, 2008
... 4. In the circuit shown in the figure find (a) the current in resistor R; (b) the resistance R; (c) the unknown emf E. (d) If the circuit is broken at point x, what is the current in resistor R? (a. 2.00 A; b. 5.00 ; c. 42.0 V; d. 3.50 A) ...
... 4. In the circuit shown in the figure find (a) the current in resistor R; (b) the resistance R; (c) the unknown emf E. (d) If the circuit is broken at point x, what is the current in resistor R? (a. 2.00 A; b. 5.00 ; c. 42.0 V; d. 3.50 A) ...
Roadmap for Emerging Materials for Spintronic Device Applications
... months earlier. By using such a GMR junction as a read head, he GMR ratio of approximately 75% with the resistance area product (RA) of almost 0.17 Ω⋅µm2 satisfies the requirement for 2-Tbit/in2 areal density in a hard disk drive (HDD). Figure 2 shows the requirement and recent major efforts towards ...
... months earlier. By using such a GMR junction as a read head, he GMR ratio of approximately 75% with the resistance area product (RA) of almost 0.17 Ω⋅µm2 satisfies the requirement for 2-Tbit/in2 areal density in a hard disk drive (HDD). Figure 2 shows the requirement and recent major efforts towards ...
Electric current
... of an electrical signal down a wire, which is on the order of the speed of light, 300 million meters per second. ...
... of an electrical signal down a wire, which is on the order of the speed of light, 300 million meters per second. ...
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.