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Coherent spin oscillations were non-thermally induced by circularly polarized pulses in fully compensated antiferromagnetic NiO. This effect is attributed to an entirely new mechanism of the action, on the spins, of the effective magnetic…

Strongly Correlated Electrons · Physics 2010-11-18 Takuya Satoh , Sung-Jin Cho , Ryugo Iida , Tsutomu Shimura , Kazuo Kuroda , Hiroaki Ueda , Yutaka Ueda , B. A. Ivanov , Franco Nori , Manfred Fiebig

We have developed a methodology for analyzing multi-frequency oscillating magnetic fields using neutron spin interferometry. A theoretical formulation was derived of the contrast and the phase of the interference pattern for an input…

Instrumentation and Detectors · Physics 2026-05-28 Ryuto Fujitani , Masahiro Hino , Takashi Higuchi

The polarization of conduction electron spins due to an electrical current is observed in strained nonmagnetic semiconductors using static and time-resolved Faraday rotation. The density, lifetime, and orientation rate of the…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 Y. Kato , R. C. Myers , A. C. Gossard , D. D. Awschalom

The Faraday Rotation Ammeter (FRA) experiment takes advantage of the Faraday Effect in order to measure the current density in a given environment. The Faraday Effect explains a rotation of a polarized electric field as it propagates…

Physics Education · Physics 2020-01-03 Jason Sisk

Soon after the first measurements of nuclear magnetic resonance (NMR) in a condensed matter system, Bloch predicted the presence of statistical fluctuations proportional to $1/\sqrt{N}$ in the polarization of an ensemble of $N$ spins. First…

Mesoscale and Nanoscale Physics · Physics 2013-10-07 P. Peddibhotla , F. Xue , H. I. T. Hauge , S. Assali , E. P. A. M. Bakkers , M. Poggio

We investigate the distribution and properties of Faraday rotating and synchrotron emitting regions in the Galactic ISM in the direction of the Galactic anti-centre. We apply Faraday tomography to a radio polarization dataset that we…

Astrophysics · Physics 2015-05-13 D. H. F. M. Schnitzeler , P. Katgert , A. G. de Bruyn

A theory of spin fluctuations of excitons in quantum wells in the presence of non-resonant excitation has been developed. Both bright and dark excitonic states have been taken into account. The effect of a magnetic field applied in a…

Mesoscale and Nanoscale Physics · Physics 2014-08-13 D. S. Smirnov , M. M. Glazov

We investigate how the imprint of Faraday rotation on radio spectra can be used to determine the geometry of radio sources and the strength and structure of the surrounding magnetic fields. We model spectra of Stokes Q and U for frequencies…

Astrophysics of Galaxies · Physics 2015-05-27 D. H. F. M. Schnitzeler , J. K. Banfield , K. J. Lee

The lead halide perovskite nanocrystals embedded into a glass matrix exhibit strong interaction with light and demonstrate exceptional optical and spin related features along with long-term chemical and physical stability. We apply the spin…

Mesoscale and Nanoscale Physics · Physics 2025-02-25 V. O. Kozlov , I. A. Smirnov , M. S. Kuznetsova , E. V. Kolobkova , G. G. Kozlov , V. S. Zapasskii , D. S. Smirnov , I. I. Ryzhov

We measure oscillator phase from the zero crossings of the voltage vs. time waveform of a spin torque nanocontact oscillating in a vortex mode. The power spectrum of the phase noise varies with Fourier frequency $f$ as $1/f^2$, consistent…

Mesoscale and Nanoscale Physics · Physics 2015-05-13 Mark W. Keller , A. B. Kos , T. J. Silva , W. H. Rippard , M. R. Pufall

Turbulence is ubiquitous in many astrophysical systems like galaxies, galaxy clusters and possibly even the IGM filaments. We study fluctuation dynamo action in turbulent systems focusing on one observational signature; the Faraday rotation…

Cosmology and Nongalactic Astrophysics · Physics 2013-01-09 Pallavi Bhat , Kandaswamy Subramanian

We perform spin-noise spectroscopy on an unpolarized $^{87}\mathrm{Rb}$ vapor in the spin-exchange-relaxation-free (SERF) regime. We observe noise spectral distributions that deviate strongly from Lorentzian models that accurately describe…

Faraday rotation measure at radio wavelengths is commonly used to diagnose large-scale magnetic fields. It is argued that the length-scales on which magnetic fields vary in large-scale diffuse astrophysical media can be inferred from…

High Energy Astrophysical Phenomena · Physics 2019-10-09 Alvina Y. L. On , Jennifer Y. H. Chan , Kinwah Wu , Curtis J. Saxton , Lidia van Driel-Gesztelyi

Ultracold alkali atoms provide experimentally accessible model systems for probing quantum states that manifest themselves at the macroscopic scale. Recent experimental realizations of superfluidity in dilute gases of ultracold fermionic…

Time-resolved Faraday rotation measurements have proved transformative in the investigation of spin dynamics in semiconductors. In materials with spin lifetimes which are on the order of, or greater than, the laser repetition time, the…

Mesoscale and Nanoscale Physics · Physics 2015-06-23 Christopher J. Trowbridge , Vanessa Sih

We present an experiment conductive to an understanding of both Faraday's law and the properties of the superconducting state. It consists in the analysis of the motion of a superconducting loop moving under the influence of gravity in an…

Physics Education · Physics 2018-08-15 Marco Giliberti , Luca Perotti , Lucio Rossi

A linear stability analysis of the free surface of a horizontally unbounded ferrofluid layer of arbitrary depth subjected to vertical vibrations and a horizontal magnetic field is performed. A nonmonotonic dependence of the stability…

Pattern Formation and Solitons · Physics 2009-11-07 V. V. Mekhonoshin , Adrian Lange

We use scanning optical magnetometry to study the broadband frequency spectra of spontaneous magnetization fluctuations, or "magnetization noise", in an archetypal ferromagnetic film that can be smoothly tuned through a spin reorientation…

Materials Science · Physics 2018-09-26 A. L. Balk , F. Li , I. Gilbert , J. Unguris , N. A. Sinitsyn , S. A. Crooker

The magnetosphere of a pulsar is composed of relativistic plasmas streaming along the magnetic field lines and corotating with the pulsar. We study the intrinsic Faraday rotation in the pulsar magnetosphere by critically examining the wave…

Solar and Stellar Astrophysics · Physics 2015-05-28 Chen Wang , Jinlin Han , Dong Lai

Observations of Faraday rotation through high-redshift galaxies have revealed that they host coherent magnetic fields that are of comparable strengths to those observed in nearby galaxies. These fields could be generated by fluctuation…

Astrophysics of Galaxies · Physics 2018-02-13 Sharanya Sur , Pallavi Bhat , Kandaswamy Subramanian