Results 151 to 160 of about 2,021,055 (195)

Magnetic Field-Controlled Microfluidic Transport

Journal of the American Chemical Society, 2001
Several new forms of magnetohydrodynamic (MHD) flow occurring in the solution gap between two 250-microm-diameter Pt microdisk electrodes, oriented in a face-to-face geometry and immersed in a uniform magnetic field (1 T), are described. The MHD flow results from the Lorentz force generated by diffusion of electrochemically generated molecular ions ...
Kyle M, Grant, Jared W, Hemmert, Henry S, White   +2 more
openaire   +2 more sources

A Proton Magnetic Field Controller

Review of Scientific Instruments, 1972
We have designed, constructed, and operated a magnetic field controller that locks the field to a proton nuclear magnetic resonance signal. The frequency of the proton spectrometer is, in turn, locked to a frequency swept synthesizer. The controller operates over ±1000 Oe centered at 3000 Oe. The long term stability is 3×10−3 Oe.
R C, La Force, G, La Force, C R, Hansen
openaire   +2 more sources

Magnetically controllable 3D microtissues based on magnetic microcryogels

Lab Chip, 2014
Microtissues on the scale of several hundred microns are a promising cell culture configuration resembling the functional tissue units in vivo.
Wei, Liu, Yaqian, Li, Siyu, Feng, Jia, Ning, Jingyu, Wang, Maling, Gou, Huijun, Chen, Feng, Xu, Yanan, Du   +8 more
openaire   +2 more sources

Ion-Controlled Collisionless Magnetic Reconnection

Physical Review Letters, 1995
A theory of fast collisionless reconnection is presented. Because of the Hall term in Ohm's law, electron and ion dynamics decouple on scales smaller than the ion inertial length $\frac{c}{{\ensuremath{\omega}}_{\mathrm{pi}}}$. Though reconnection requires electron inertia to break the frozen-flux constraint, the rate is essentially independent of the ...
Biskamp, D., Schwarz, E., Drake, F.
openaire   +4 more sources

MAGNETIC MICROTRAPS FOR QUANTUM CONTROL

International Journal of Quantum Information, 2007
We will review the realization of magnetic microtraps for ultracold atoms. Such devices combine experimental simplicity with unsurpassed versatility in designing confining potentials. We will show how combining magnetic microtraps with optical lattices one can realize many possible quantum systems of interest in many fields ranging from solid state ...
I. Herrera, G. D’Arrigo, M. Siciliani de Cumis, CATALIOTTI, FRANCESCO SAVERIO   +3 more
openaire   +2 more sources

Magnetic control of ferroelectric polarization

Nature, 2003
The magnetoelectric effect--the induction of magnetization by means of an electric field and induction of polarization by means of a magnetic field--was first presumed to exist by Pierre Curie, and subsequently attracted a great deal of interest in the 1960s and 1970s (refs 2-4).
T, Kimura, T, Goto, H, Shintani, K, Ishizaka, T, Arima, Y, Tokura   +5 more
openaire   +2 more sources

A magnetic amplifier frequency control

Electrical Engineering, 1950
TO SUPPLY power to certain types of shipboard instruments, a source of alternating current is required in which the frequency error must be ±0.1 per cent or less over a range of temperatures, loads, and supply voltages. This need has been met by the use of small motor-driven alternators which run on the ship's d-c power supply.
L. J. Johnson, H. G. Schafer
openaire   +1 more source

Controlling magnetic dipole transition with magnetic plasmonic structures

Optics Letters, 2011
A plasmonic structure with double gold patches is proposed for enhancing the spontaneous emission of a magnetic dipole transition through a magnetic hot area. A Purcell factor of nearly 2000 can be obtained at optical frequencies together with a low sensitivity in spatial and spectral mismatches between the light emitter and the resonance mode.
Feng, Tianhua, Zhou, Ying, Liu, Dahe, Li, Jensen Tsan Hang   +3 more
openaire   +3 more sources

Voltage-Controlled Magnetism

Science, 2013
Physics Many components of modern devices are based on magnetic effects; magnetic read heads, for example, use the phenomenon known as exchange bias, in which two materials that order magnetically are interfaced, causing the magnetic properties of the ferromagnetic layer (in which spins align parallel to each other) to be affected by the ...
openaire   +1 more source

Magnetic control of ferroelectric interfaces

Journal of Physics: Condensed Matter, 2011
We report the strong magnetic field dependence of ferroelectric PbZr(0.52)Ti(0.48)O(3) (PZT) films on half-metallic oxide La(0.67)Sr(0.33)MnO(3) (LSMO) electrodes. As the field H is increased, the hysteresis loop first broadens (becomes lossy) and then disappears at approximately H = 0.34 T and ambient temperatures.
S, Dussan, A, Kumar, R S, Katiyar, S, Priya, J F, Scott   +4 more
openaire   +2 more sources