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A MOKE magnetometry unit simultaneously sensitive to both in-plane magnetization components, based on an intensity differential detection method, allows us to observe the uniaxial anisotropy impressed during CoFe-deposition and to…

Magnetostatic normal modes are investigated here in elongated rods. The dipolar field resulting from the dipole-dipole interactions is calculated numerically in points of the axis connecting opposite rod face centers (\emph{central axis})…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 H. Puszkarski , M. Krawczyk , J. -C. S. Levy

Linear polarization angle, $\theta$, dependent measurements of the microwave radiation-induced oscillatory magnetoresistance, $R_{xx}$, in high mobility GaAs/AlGaAs 2D electron devices have shown a $\theta$ dependence in the oscillatory…

Mesoscale and Nanoscale Physics · Physics 2017-09-13 Han-Chun Liu , Tianyu Ye , W. Wegscheider , R. G. Mani

We perform the first magnetohydrodynamic simulations in full general relativity of self-consistent rotating neutron stars (NSs) with ultrastrong mixed poloidal and toroidal magnetic fields. The initial uniformly rotating NS models are…

General Relativity and Quantum Cosmology · Physics 2022-02-23 Antonios Tsokaros , Milton Ruiz , Stuart L. Shapiro , Kōji Uryū

We report the results of micromagnetic simulations of domain wall (DW) nucleation and pinning/depinning processes in ferromagnetic planar structure consisting of nanowire (NW) with perpendicular anisotropy and special V-shaped nanoparticle…

Materials Science · Physics 2018-07-04 O. L. Ermolaeva , V. L. Mironov

We studied the in-plane angular magnetoresistance (AMR), in the normal state, of underdoped superconducting Sr1-xLaxCuO2 , which has the simplest crystal structure among cuprates. The measurements of two underdoped thin films with different…

Superconductivity · Physics 2023-04-18 V. P. Jovanović , H. Raffy , Z. Z. Li , G. Reményi , P. Monceau

We investigate the effect of the Dzyaloshinskii Moriya interaction (DMI) on magnetic domain nucleation in a ferromagnetic thin film with perpendicular magnetic anisotropy. We propose an extended droplet model to determine the nucleation…

By the application of an in-plane magnetic field, we demonstrate control of the fine structure polarisation splitting of the exciton emission lines in individual InAs quantum dots. The selection of quantum dots with certain barrier…

We demonstrate that electron wave functions change their dimensionality at some commensurate directions of a magnetic field in conductors with open [quasi-one-dimensional (Q1D)] sheets of Fermi surface. These 1D -> 2D dimensional crossovers…

Superconductivity · Physics 2009-11-10 A. G. Lebed , Heon-Ick Ha , M. J. Naughton

We investigate the bulk magnetic, electron paramagnetic resonance, and magneto-optical properties of {Ni4Mo12}, a magnetic molecule with antiferromagnetically coupled tetrahedral {Ni4Mo12} in a diamagnetic molybdenum matrix. The…

Detailed magnetization measurements, M(T,H,theta), were performed on single crystals of TbPtIn and TmAgGe (both members of the hexagonal Fe_2P/ZrNiAl structure type), for the magnetic field H applied perpendicular to the crystallographic c…

Strongly Correlated Electrons · Physics 2009-11-10 E. Morosan , S. L. Bud'ko , P. C. Canfield

We employ the dynamical mean field approximation to perform a systematic study of magnetism in Ga_{1-x}Mn_xAs. Our model incorporates the effects of the strong spin-orbit coupling on the J=3/2 GaAs valence bands and of the exchange…

Strongly Correlated Electrons · Physics 2007-05-23 K. Aryanpour , J. Moreno , M. Jarrell , R. S. Fishman

Shape asymmetries in nominally circular nanomagnets provide a potential means for vortex chirality control. However, in realistic arrays their effects are challenging to probe since asymmetric magnetization reversal processes are often…

Materials Science · Physics 2009-07-15 Randy K. Dumas , Thomas Gredig , Chang-Peng Li , Ivan K. Schuller , Kai Liu

Magnetization reversal in permanent magnets occurs by the nucleation and expansion of reversed domains. Micromagnetic theory offers the possibility to localize the spots within the complex structure of the magnet where magnetization…

Materials Science · Physics 2018-05-25 J. Fischbacher , A. Kovacs , L. Exl J. Kühnel , E. Mehofer , H. Sepehri-Amin , T. Ohkubo , K. Hono , T. Schrefl

We report on a complex nontrivial behavior of the optical anisotropy of quantum dots that is induced by a magnetic field in the plane of the sample. We find that the optical axis either rotates in the opposite direction to that of the…

We study the magnetization dynamics of a molecular magnet driven by static and variable magnetic fields within a semiclassical treatment. The underling analyzes is valid in a regime, when the energy is definitely lower than the anisotropy…

Chaotic Dynamics · Physics 2009-07-24 L. Chotorlishvili , P. Schwab , J. Berakdar

We study an exciton in a type II quantum dot, where the electron is confined in the dot, but the hole is located in the barrier material. The exciton properties are studied as a function of a perpendicular magnetic field using a…

Mesoscale and Nanoscale Physics · Physics 2009-09-25 K. L. Janssens , B. Partoens , F. M. Peeters

Disk accretion to rotating stars with complex magnetic fields is investigated using full three-dimensional magnetohydrodynamic (MHD) simulations. The studied magnetic configurations include superpositions of misaligned dipole and quadrupole…

Astrophysics · Physics 2009-11-13 M. Long , M. M. Romanova , R. V. E. Lovelace

The influence of an inhomogeneous magnetic field on the magnetoresistance of thin Al films, used in different superconductor/ferromagnet hybrids, has been investigated. Two contrasting magnetic textures with out-of-plane magnetization are…

Superconductivity · Physics 2009-11-13 W. Gillijns , A. Aladyshkin , A. V. Silhanek , V. V. Moshchalkov

The microscopic structure of spin-orbit fields for the technologically important Fe/GaAs interface is uncovered from first principles. A symmetry based method allows to obtain the spin-orbit fields---both their magnitude and…

Mesoscale and Nanoscale Physics · Physics 2013-09-18 Martin Gmitra , Alex Matos-Abiague , Claudia Draxl , Jaroslav Fabian