The configuration of the regular magnetic field in M 31 is deduced from radio polarization observations at the wavelengths λλ 6, 11 and 20 cm. By fitting the observed azimuthal distribution of polarization angles, we find that the regular magnetic field, averaged over scales 1–3kpc, is almost perfectly axisymmetric in the radial range 8 to 14 kpc, and follows a spiral pattern with pitch angles ...

We propose a new strategy for ultrafast magnetization reversal of nanomagnets. Due to the Inverse Faraday Effect, circularly polarized optical pulses induce a pulsed magnetic flux in materials with large magneto-optical susceptibility. Alternatively, intense optical pulses can induce a pulsed magnetic flux by means of ultrafast demagnetization of a metallic thin film or multilayer with a perpen...

Compensation of the temperature dependence of the Verdet constant in a polarimetric extrinsic Faraday sensor is of major importance for applying the magneto-optical effect to AC current measurements and magnetic field sensing. This paper presents a method for compensating the temperature effect on the Faraday rotation in a Bi12GeO20 crystal by sensing its optical activity effect on the polariza...

Different Faraday Rotation (FR) estimators are discussed, their estimation performances are assessed and compared to each other. The algorithms are applied on a set of quad-pol ALOS Pal-SAR data and the obtained estimates are validated against FR values derived from TEC maps obtained from GPS measurements.

We use an optical cavity in the regime of intermediate coupling between atom and cavity mode to detect single moving atoms. Degenerate polarization modes allow excitation of the atoms in one mode and collection of spontaneous emission in the other while keeping separate the two sources of light; we obtain a higher confidence and efficiency of detection by adding cavity-enhanced Faraday rotation...

In this work it was developed a Van de Graaff generator that we design and built and that is intended to be used in secondary schools for teaching basic principles of electrostatics, electromagnetic as well as a number of other applications. Today many schools laboratories and museums use this kind of generator for electrostatic demonstrations. Electrostatics was first noticed by the Greek phil...

Most of the known pulsars are sources of highly linearly polarized radiation. Faraday rotation in the intervening medium rotates the plane of the linear polarization as the signals propagate through the medium. The Rotation Measure (RM), which quantifies the amount of such rotation as a function of wavelength, is useful in studying the properties of the medium and in recovering the intrinsic po...

Low error measurements at the Arecibo Observatory (at 318MHz) of the weighted average interstellar magnetic field projected on the line of sight 〈B‖〉 and of the Rotation Measure in the direction of several pulsars were done using a new method. This method is based on the measurement of the period of the temporal modulation in the linearly polarized component of the pulsar pulse observed in a wi...

We use paramagnetic Faraday rotation to study spin noise spectrum from unpolarized Rb vapor in a tightly focused probe beam in the presence of N2 buffer gas. We derive an analytical form for the diffusion component of the spin noise time-correlation function in a Gaussian probe beam. We also obtain analytical forms for the frequency spectrum of the spin noise in the limit of a tightly focused o...

We present a correlation between X-ray surface brightness and Faraday rotation measure in galaxy clusters, both, from radio and X-ray observations as well as from modeling of the intra-cluster medium. The observed correlation rules out a magnetic field of constant strength throughout the cluster. Cosmological, magneto-hydrodynamic simulations of galaxy clusters are used to show that for a magne...