Multi-wavelength observations from radio to soft X-ray bands of large-scale galactic spiral structures offer synthesized and comprehensive views of nearby disk galaxies. In the presence of a massive dark-matter halo, the density-wave dynamics on galactic scales involves the stellar disk, the gas disk of interstellar medium (ISM), the magnetic field, and the cosmic-ray gas (CRG). In this paper, ...

Remotely and selectively turning on and off the magnetization of many micro-scale magnetic actuators could be a great enabling feature in fields such as microrobotics and microfluidics. We present an array of addressable 800 6 800 6 75 mm micropumps made from a composite material whose net magnetic moment can be selectively turned on or off by application of a large magnetic field pulse. The ma...

In the growing field of mechanobiology, artificial mechano-reactive systems play an essential role in generation mechanical forces and control material deformations. Free-standing magnetic nanoparticles have been studied for stimulation living cells. Magnetic composite materials are also used to mimic muscles at macroscale. this study, a new magnetically actuated membrane is focused, which can ...

A modest in-plane magnetic field Bk is sufficient to destroy the fractional quantized Hall states at 1⁄4 5=2 and 7=2 and replace them with anisotropic compressible phases. Remarkably, we find that at larger Bk these anisotropic phases can themselves be replaced by isotropic compressible phases reminiscent of the composite fermion fluid at 1⁄4 1=2. We present strong evidence that this transition...

Abstract We present a strategy for the design of ferromagnetic materials with exceptionally low magnetic hysteresis, quantified by coercivity. In this strategy, we use micromagnetic algorithm that have developed in previous research and which has been validated its success solving “Permalloy Problem”—the well-known difficulty predicting composition 78.5% Ni lowest coercivity Fe–Ni system—and in...

In contrast with amorphous alloys, nanocrystalline soft magnetic materials show improved thermal stability and higher soft magnetic properties. The nanocrystalline soft magnetic composites are usually fabricated by partially crystallizing from parent amorphous alloys. This paper reports our experimental observation on the sequence of crystallization in metallic glass under a high magnetic field...

Abstract Samples of silicone and composite material are studied in various compression modes up to the limiting permissible deformation levels. In first series tests, changes elastoplastic properties during a sample without fillers studied. second elastic-plastic soft with special researched. Depending on magnitude deformation, elastic modules tested materials defined analyzed. Based constructe...

We review the basic phenomenology of magnetic losses from DC to 1 GHz in commercial and laboratory-prepared soft ferrites considering recent concepts regarding their physical interpretation. This is based, on one hand, identification contributions magnetization process provided by spin rotations domain walls and, other concept loss separation. It additionally contemplates a distinction between ...