We present a hybrid CMOS-based microfluidic system that combines magnetic actuation of microparticles with in situ optical detection using ingle photon avalanche diodes (SPADs). The decoupling of the principles used for actuation and sensing permits a high sensitivity with respect to etection and particle handling. Single magnetic microparticles are transported within a glass micro-capillary po...

We perform three-dimensional particle-in-cell simulations of magnetic reconnection with multiple magnetic null points. Magnetic field energy conversion into kinetic energy is about five times higher than in traditional Harris sheet configuration. More than 85% of initial magnetic field energy is transferred to particle energy during 25 reversed ion cyclofrequencies. Magnetic reconnection in the...

Magnetic particle testing (MT) is the most sensitive method to detect surface cracks in ferromagnetic materials [2]. This method can be executed by mobile equipment or stationary systems [3]. Magnetic particles are used for the visualisation of the surface cracks. The magnetic particles are an iron oxide powder coated with visible or fluorescent paint. They are also called test agent or magneti...

New possibilities to design artificial magnetic materials for microwave frequencies are considered. Such composites can be used in microwave engineering at frequencies where no natural lowloss magnetic materials are available. A new magnetic particle (metasolenoid) formed by a stack of many parallel and very closely spaced single broken loops is proposed and analyzed analytically, numerically, ...

S. Gider et al. (1) studied classical and quantum magnetic phenomena in natural and artificial ferritin proteins. If the magnetic moment of the ferritin molecules is blocked below 5 K, as Gider et al. show in figures 1 and 2 of their report (1), then the observed resonance at 24.3 mK, shown in figure 3 of their report, cannot be attributed to quantum oscillations of the magnetic moment between ...

   The presented study investigates application of polyethylene glycol (PEG)-coated Fe3O4 nanoparticles as an magnetic nanoadsorbent for magnetic solid-phase extraction (SPE) and the selective removal of toxic heavy metals such as mercury (II) from aqueous solutions and their determination using graphite furnace atomic absorption spectrometry (GF-AAS)...

S. Gider et al. (1) studied classical and quantum magnetic phenomena in natural and artificial ferritin proteins. If the magnetic moment of the ferritin molecules is blocked below 5 K, as Gider et al. show in figures 1 and 2 of their report (1), then the observed resonance at 24.3 mK, shown in figure 3 of their report, cannot be attributed to quantum oscillations of the magnetic moment between ...

We investigate the equilibrium magnetic properties of a simple cubic small ferromagnetic particle under an external magnetic field. Although the particle is small, it can not be considered as a single-domain unit. The magnetic moments are represented by unitary spin vectors and we consider ferromagnetic interactions between nearest-neighbor spins. The coupling between spins is given in terms of...

The adiabatic motion of a charged, spinning, quantum particle in a two dimensional magnetic field is studied. A suitable set of operators generalizing the cinematical momenta and the guiding center operators of a particle moving in a homogeneous magnetic field is constructed. This allows us to separate the two degrees of freedom of the system into a fast and a slow one, in the classical limit, ...

Magnetic, granulometric and geochemical analyses were conducted on an intertidal sediment core from the Yangtze Estuary to evaluate the possibility of normalizing samples for particle size effects in a heavy metal pollution study by means of magnetic proxies. It has been found that the magnetic parameter χARM, indicating fine grained ferrimagnetic minerals, correlates well with the clay content...