We examine the observations of large-scale magnetic elds in the Universe. We begin at the largest scale with clusters of galaxies and work our way down through galaxies and nally to the Milky Way, on which we concentrate in detail. We examine the observations of the Galactic magnetic eld, and their interpretation, under the philosophy that the Galactic magnetic eld is like that in other spiral ...

We use Monte Carlo and quaternion molecular dynamics simulations to study the self-assembly of intriguing structures which form in colloidal sus-pensions of small magnetite particles. We show that the only stable isomers with few particles, a ring and a chain, can be eeciently interconverted using a magnetizable tip. We propose to use the oscillating dipole eld of the tip to locally anneal the ...

A nonlinear, 1D-slab, 2-dynamo is analysed for magnetic eld amplitudes and for the relation between the cycle time and the dynamo number. If the only nonlin-earity is the conventional-quenching, the magnetic eld strongly grows with the dynamo number, while the dependence of the cycle time is only rather weak. The opposite is true if the nonlinear feedback is more consistently included: the comp...

Magnetoelectric fi lms are proposed as key components for spintronic applications. The net magnetic moment created by an electric fi eld in a magnetoelectric thin fi lm infl uences the magnetization state of a neighbouring ferromagnetic layer through exchange coupling. Pure electrical control of magnetic confi gurations of giant magnetoresistance spin valves and tunnelling magnetoresistance ele...

A model of the magnetosheath structure proposed in a recent paper from the authors is extended to estimate the magnetopause stand-o€ distance from solar wind data. For this purpose, the relationship of the magnetopause location to the magnetosheath and solar wind parameters is studied. It is shown that magnetopause erosion may be explained in terms of the magnetosheath magnetic ®eld penetration...

A new superferric magnetic storage ring with highly homogeneous eld at 1.45 T and weak electrostatic focussing is described which has been set up at the Brookhaven National Laboratory (BNL), USA, for a precision measurement of the magnetic anomaly of the muon. The toroidal storage volume has a radius of 7 m and a diameter of 9 cm. Precision magnetic eld determination based on pulsed NMR on prot...

The magnetic Ap star 53 Cam has been described as the best object for testing theories of elemental diiusion in the presence of a stellar magnetic eld. It is thus vital to determine the rotational period of this very important star as accurately as possible. An improved period (8:02681 0:00004 days) is derived here by combining new measurements of the eeective magnetic eld with previously publi...

Possible con®gurations of the magnetic ®eld in the outer magnetosphere during geomagnetic polarity reversals are investigated by considering the idealized problem of a magnetic multipole of order m and degree n located at the centre of a spherical cavity surrounded by a boundless perfect diamagnetic medium. In this illustrative idealization, the ®xed spherical (magnetopause) boundary layer beha...

This article reports on a longitudinal, quasi-experimental comparison of two English language development (ELD) models implemented from kindergarten through Grade 3 to support oral among Spanish-speaking learners (ELLs). Specifically, the study examined proficiency students who received only integrated (I-ELD; n = 39) and I-ELD with 30 minutes daily designated ELD (D-ELD) entailing four specifi...