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Magneto optic measurements are a very powerful tool for investigating the polarization of a conduction band as a function of temperature and are used here to study the polarization of the mobile electrons in 50nm LSMO (x=0.3) strained thin…

强关联电子 · 物理学 2009-11-13 T. K. Nath , J. R. Neal , G. A. Gehring

The infrared (900-1100 cm-1) Faraday rotation and circular dichroism are measured in the normal state of underdoped High Tc superconductors and used to study the magneto-transport. YBa2Cu3O6+x thin films are investigated in the temperature…

超导电性 · 物理学 2009-11-10 L. B. Rigal , D. C. Schmadel , H. D. Drew , B. Maiorov , E. Osquigil , J. S. Preston , R. Hughes , G. D. Gu

We investigate the spin dynamics of high-mobility two-dimensional electrons in GaAs/AlGaAs quantum wells grown along the $[001]$ and $[110]$ directions by time-resolved Faraday rotation at low temperatures. In measurements on the…

介观与纳米尺度物理 · 物理学 2011-07-01 M. Griesbeck , M. M. Glazov , T. Korn , E. Ya. Sherman , D. Waller , C. Reichl , D. Schuh , W. Wegscheider , C. Schüller

The electron spin resonance absorption spectrum of Eu^{2+} ions serves as a probe of the normal and superconducting state in Eu_{0.5}K_{0.5}Fe_2As_2. The spin-lattice relaxation rate 1/T_1^{\rm ESR} obtained from the ESR linewidth exhibits…

X-ray absorption spectra in a wide energy range around the 4d-4f excitation threshold of Gd were recorded by total electron yield from in-plane magnetized Gd metal films. Matching the experimental spectra to tabulated absorption data…

材料科学 · 物理学 2009-11-07 J. E. Prieto , F. Heigl , O. Krupin , G. Kaindl , K. Starke

Multifrequency polarimetric observations made with the Very Long Baseline Array of the quasar 3C216 reveal the presence of Faraday rotation measures (RMs) in excess of 2000 rad/m**2 in the source rest frame, in the arc of emission located…

天体物理学 · 物理学 2009-10-31 T. Venturi , G. B. Taylor

We present the experimental evidence for the presence of spinodal decomposition of the magnetic ions in the Ge/1-x-y/Cr/x/Eu/y/Te samples with chemical composition varying in the range of 0.015 < x < 0.057 and 0.003 < y < 0.042. The…

The development of a new era of quantum devices requires an understanding of how paramagnetic dopants or impurity spins behave in crystal hosts. Here, we describe a new spectroscopic technique which uses traditional Electron Spin Resonance…

Here we describe a new high frequency/high field continuous wave and pulsed electrically detected magnetic resonance (CW EDMR and pEDMR) setup, operating at 263 GHz and resonance fields between 0 and 12 T. Spin dependent transport in…

材料科学 · 物理学 2015-12-09 W. Akhtar , A. Schnegg , S. Veber , C. Meier , M. Fehr , K. Lips

Spin noise spectroscopy is a method of magnetic resonance widely used, nowadays, in atomic and semiconductor research. Classical objects of the EPR spectroscopy - dielectrics with paramagnetic impurities - seemed to be unsuitable for this…

介观与纳米尺度物理 · 物理学 2020-07-01 A. N. Kamenskii , A. Greilich , I. I. Ryzhov , G. G. Kozlov , M. Bayer , V. S. Zapasskii

Excitation of antiferromagnetic spin waves in HoFeO$_{3}$ crystal combined with a split ring resonator (SRR) is studied using terahertz (THz) electromagnetic pulses. The magnetic field in the vicinity of the SRR induced by the incident THz…

光学 · 物理学 2014-04-09 Y. Mukai , H. Hirori , T. Yamamoto , H. Kageyama , K. Tanaka

We present the results of a radio polarimetric study of the high-redshift radio galaxy PKS B0529-549 (z=2.575), based on high-resolution 12 mm and 3 cm images obtained with the Australia Telescope Compact Array (ATCA). The source is found…

天体物理学 · 物理学 2008-11-26 J. W. Broderick , C. De Breuck , R. W. Hunstead , N. Seymour

By direct measurements of the complex optical conductivity $\sigma(\nu)$ of FeSi we have discovered a broad absorption peak centered at frequency $\nu_{0}(4.2 K) \approx 32 cm^{-1}$ that develops at temperatures below 20 K. This feature is…

High intensity THz lasers allow for the coherent excitation of individual phonon modes. The ultrafast control of emergent magnetism by means of phonons opens up new tuning mechanisms for functional materials. While theoretically predicted…

材料科学 · 物理学 2024-07-08 R. Matthias Geilhufe , Wolfram Hergert

Precise measurements of YbFeO_3 magnetization in the spin-reoirentation temperature interval are performed. It is shown that ytterbium orthoferrite is well described by a recently developed modified mean field theory developed for ErFeO_3.…

材料科学 · 物理学 2007-06-13 Ya. B. Bazaliy , L. T. Tsymbal , G. N. Kakazei , V. I. Kamenev , P. E. Wigen

In this paper we propose that electron spin resonance (ESR) measurements enable us to detect the long-range spin nematic order. We show that the frequency of the paramagnetic resonance peak in the ESR spectrum is shifted by the…

强关联电子 · 物理学 2018-03-22 Shunsuke C. Furuya , Tsutomu Momoi

To capture the high-field magnetization process of herbertsmithite (ZnCu3(OH)6Cl2), Faraday rotation (FR) measurements were carried out on a single crystal in magnetic fields of up to 190 T. The magnetization data evaluated from the FR…

强关联电子 · 物理学 2020-09-29 Ryutaro Okuma , Daisuke Nakamura , Shojiro Takeyama

The field of spintronics involves the study of both spin and charge transport in solid state devices with a view toward increasing their functionality and efficiency. Alternatively, the field of ultrafast magnetism focuses on the use of…

介观与纳米尺度物理 · 物理学 2017-11-07 Yang Yang , R. B. Wilson , Jon Gorchon , Charles-Henri Lambert , Sayeef Salahuddin , Jeffrey Bokor

We report a magnetotransport study of spin relaxation in 1.4-21.2 nm epitaxial SrIrO$_3$ thin films coherently strained on SrTiO$_3$ substrates. Fully charge compensated semimetallic transport has been observed in SrIrO$_3$ films thicker…

强关联电子 · 物理学 2020-06-16 L. Zhang , X. Jiang , X. Xu , X. Hong

Pure spin currents are measured in micron-wide channels of GaAs two-dimensional electron gas (2DEG). Spins are injected and detected using quantum point contacts, which become spin polarized at high magnetic field. High sensitivity to the…

介观与纳米尺度物理 · 物理学 2009-11-13 S. M. Frolov , A. Venkatesan , W. Yu , W. Wegscheider , J. A. Folk