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Browsing Research and Publications - Department of Physics & Astronomy by Title

Now showing items 397-416 of 853

Local Manipulation and Reversal of the Exchange Bias Field by Ion Irradiation in FeNi/FeMn Double layers

Mougin, A.; Mewes, T.; Jung, M.; Engel, D.; Ehresmann, A.; Schmoranzer, H.; Fassbender, J.; Hillebrands, B. (2001)

Both the direction and the strength of the exchange bias field Heb of an FeNi/FeMn double layer are manipulated locally by He ion irradiation in an applied magnetic field. The magnitude of Heb is enhanced over its initial ...
Locating the Accretion Footprint on a Herbig Ae Star: MWC 480

Silverstone, Murray (American Astronomical Society, 2010-08-20)

Accretion is a fundamental process which establishes the dynamics of the protoplanetary disk and the final properties of the forming star. In solar-type stars, the star–disk coupling is determined by the magnetic field ...
Location and Direction Dependent Effects in Collider Physics from Noncommutativity

Okada, Nobuchika (2010-07-28)

We examine the leading order noncommutative corrections to the differential and total cross sections for e⁺e⁻ → qq̅. After averaging over the Earth’s rotation, the results depend on the latitude for the collider, as well ...
Location and Direction Dependent Effects in Collider Physics from Noncommutativity

Haghighat, Mansour; Okada, Nobuchika; Stern, Allen (2010-06-28)

We examine the leading order noncommutative corrections to the differential and total cross sections for e+ e− → qq‾. After averaging over the Earth’s rotation, the results depend on the latitude for the collider, as well ...
Lorentz Transformations as Lie-Poisson Symmetries

Stern, Allen (1998-06-04)

We write down the Poisson structure for a relativistic particle where the Lorentz group does not act canonically, but instead as a Poisson–Lie group. In so doing we obtain the classical limit of a particle moving on a ...
Lorentzian Fuzzy Spheres

Chaney, A.; Lu, Lei; Stern, Allen (2015-09-16)

We show that fuzzy spheres are solutions of Lorentzian Ishibashi-Kawai-Kitazawa-Tsuchiya-type matrix models. The solutions serve as toy models of closed noncommutative cosmologies where big bang/crunch singularities appear ...
Low Gilbert Damping in Co2FeSi and Fe2CoSi Films

Sterwerf, Christian; Paul, Soumalya; Khodadadi, Behrouz; Meinert, Markus; Schmalhorst, Jan-Michael; Buchmeier, Mathias; Mewes, Claudia K. A.; Mewes, Tim; Reiss, Günter (2016)
Low Scale Gravity Mediation with Warped Extra Dimension and Collider Phenomenology on the Hidden Sector

Okada, Nobuchika (2006-09-19)

We propose a scenario of gravity mediated supersymmetry breaking (gravity mediation) in a supersymmetric Randall-Sundrum model. In our setup, both the visible sector and the hidden sector coexist on the infrared (IR) brane. ...
Low-Mass X-Ray Binaries and Globular Clusters in Early-Type Galaxies

Sarazin, Craig L.; Kundu, Arunav; Irwin, Jimmy A.; Sivakoff, Gregory R.; Blanton, Elizabeth L.; Randall, Scott W. (2003-10-01)
Low-Mass X-Ray Binaries as the Source of the Very Soft X-Ray Emission in the X-Ray-Faintest Early-Type Galaxies

Irwin, Jimmy A.; Sarazin, Craig L. (1998-02-10)
Luminous [O III] and [N II] from Tidally Disrupted Horizontal Branch Stars

Clausen, Drew; Sigurdsson, Steinn; Eracleous, Michael; Irwin, Jimmy A. (2012)
A Luminous and Isolated Gamma-Ray Flare from the Blazar B2 1215+30

Santander, Marcos (2017-02-21)

B2 1215+30 is a BL-Lac-type blazar that was first detected at TeV energies by the MAGIC atmospheric Cherenkov telescopes and subsequently confirmed by the Very Energetic Radiation Imaging Telescope Array System (VERITAS) ...
A luminous X-ray outburst from an intermediate-mass black hole in an off-centre star cluster

Lin, Dacheng; Strader, Jay; Carrasco, Eleazar R.; Page, Dany; Romanowsky, Aaron J.; Homan, Jeroen; Irwin, Jimmy A.; Remillard, Ronald A.; Godet, Olivier; Webb, Natalie A.; Baumgardt, Holger; Wijnands, Rudy; Barret, Didier; Duc, Pierre-Alain; Brodie, Jean P.; Gwyn, Stephen D. J. (2018-06-14)

A unique signature for the presence of massive black holes in very dense stellar regions is occasional giant-amplitude outbursts of multi-wavelength radiation from tidal disruption and subsequent accretion of stars that ...
Maffei 1 with the Hubble Space Telescope

Buta, Ronald J.; McCall, Marshall L. (American Astronomical Society, 2003-03)

High-resolution R, I, and Hα images of the center of Maffei 1, the nearest normal giant elliptical galaxy (M^0/_v = -20.9), have been acquired with the Hubble Space Telescope. At its distance of 3.0 Mpc, 1 pixel in the ...
Magnetic and Microwave Properties of Ferrimagnetic Zr-substituted Ba2Zn2Fe12O22 (Zn-Y) Single Crystals

Jalli, Jeevan; Hong, Yang-Ki; Bae, Seok; Lee, Jae-Lin; Abo, Gavin S.; Park, Ji-Hoon; Choi, Byoung-Chul; Mewes, Tim; Kim, Seong-Gon; Gee, Sung-Hoon; Nam, In-Tak; Tanaka, Terumitsu (2011)
Magnetic and Structural Properties of MnBi Multilayered Thin Films

Mankey, Gary (AIP Publishing, 2014-02-27)

Magnetic and structural properties of MnBi films with thicknesses up to 50 nm were investigated. Thin films of the MnBi LTP (Low Temperature Phase) were fabricated onto silica-glass substrates by sputter-deposition of Bi/Mn ...
The Magnetic Anisotropy and Domain Structure of Permalloy Antidot Arrays

Mankey, Gary (2000-04-28)

The magnetic properties of antidot arrays in permalloy films were studied using magnetic force microscopy (MFM), the magneto-optical Kerr effect (MOKE), and torque magnetometry. New observations of the magnetic domain ...
Magnetic Behavior of ₁ and CoxNi(1−x) Pseudomorphic Films

Mankey, Gary (1998-06-04)

We set out to compare the ferromagnetic behavior of ₁ and CoₓNi(1−ₓ) films of varying stoichiometry epitaxially grown on Cu(100). The thickness chosen was 5 ML over a wide alloy composition range. Using a scaling law for ...
Magnetic Order and Phase Transitions in Fe_50Pt_50–xRh_x

Mankey, Gary (International Union of Crystallography, )

Polarized and unpolarized neutron diffraction techniques have been applied to study the temperature-dependent magnetic and structural properties of four 200 nm-thick (Fe_50)(Pt_50-x)(RH_x) films with x = 5, x = 10, x = ...
Magnetic Properties and Structure of Low Temperature Phase MnBi with Island Structure

Mankey, Gary (2017-02-22)

The magnetic properties of the low temperature phase (LTP) MnBi thin films of islands structure are discussed. The LTP MnBi islands are formed onto silica substrates after the multilayers Bi(3.2nm)/Mn(2nm)x N are deposited ...

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Browsing Research and Publications - Department of Physics & Astronomy by Title

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