Concept

Permeability (electromagnetism)

Related publications (167)

Magneto-microfluidic three-dimensional focusing of magnetic particles

Martinus Gijs, Thomas Lehnert, Yves Moser, Rana Afshar Ghasemlouy

We present a method for magneto-microfluidic three-dimensional focusing of magnetic microparticles from a dense plug into a single streamline with longitudinal inter-particle spacing. Plug formation on-chip is induced by a high-gradient magnetic field gene ...

Amer Inst Physics, 2 Huntington Quadrangle, Ste 1No1 D, Melville, Ny 11747-4501 Usa2010

Optimisation of low pressure processing for honeycomb sandwich structures

Sandra Sequeira Lopes Tavares

Vacuum-bag processing of honeycomb sandwich structures faces particular challenges compared to autoclave sandwich fabrication for aeronautics, a consequence of using, at the most, atmospheric pressure for their manufacturing. In particular, the adhesion of ...

EPFL2009

Modelling of a two-stage magnetic refrigerator with wavy-structure gadolinium heat exchangers

Didier Albert Simon Vuarnoz, Cyrill Gonin

In a rotary magnetic refrigerator, a porous ring is turning in and out of a magnetic field region. At the outlet the adiabatic demagnetization of the magnetocaloric material (refrigerant) produces the "cold energy". The induced cold is described by a corre ...

International Institute of Refrigeration IIR-IIF2009

Field-induced magnetic phases and electric polarization in LiNiPO4

Henrik Moodysson Rønnow

Neutron diffraction is used to probe the (H,T) phase diagram of magnetoelectric (ME) LiNiPO4 for magnetic fields along the c axis. At zero field the Ni spins order in two antiferromagnetic phases. One has commensurate (C) structures and general ordering ve ...

2009

A standardization of the coefficient of performance for magnetic refrigerators, heat pumps and energy conversion machines

Didier Albert Simon Vuarnoz, Cyrill Gonin

Publications on magnetocaloric materials, magnetic refrigerators, magnetic heat pumps and magnetic power conversion machines contain experimental results as well as solutions obtained by physical modelling, analytical and numerical calculations. Whereas ma ...

International Institute of Refrigeration IIR-IIF2009

Mean-Field calculations on the diluted dipolar magnet LiHo1−xYxF4

Bastien Dalla Piazza

We define a new inhomogeneous mean-field algorithm to study the magnetic alloy LiHo1−xYxF4. The phase diagrams in the Hx-T, x-T and x-Hx planes are computed. The calculated critical temperature is overestimated by 27% and the critical field is underestimat ...

2009

Modeling and simulation of the operation of a rotary magnetic refrigerator

Didier Albert Simon Vuarnoz, Cyrill Gonin

Magnetic refrigeration is a new environmentally benign technology and a promising alternative to conventional vapor-cycle refrigeration. The household refrigerator without a freezing compartment shows very good prospects for a successful application. This ...

2009

Towards electron spin resonance of mechanically exfoliated graphene

László Forró, Arnaud Magrez, Andrzej Sienkiewicz, Luka Ciric, Bálint Náfrádi, Marijana Mionic Ebersold

We have attempted to prepare graphene samples by mechanical exfoliation of HOPG (highly oriented pyrolytic graphite) using scotch tape. Random testing of the flakes by AFM has shown in majority single layer graphene. Nevertheless, the presence of ultrathin ...

2009

Magnetic crossover and complex excitation spectrum of the ferromagnetic/antiferromagnetic spin-1/2 chain system alpha-TeVO4

Helmuth Berger

We report magnetic-susceptibility, specific-heat, and Raman-scattering investigations of alpha-TeVO4 containing V-O edge-sharing chains. These chains promote a system of ferromagnetic/antiferromagnetic spin-1/2 Heisenberg alternating exchange chains with p ...

2008

Nonlinear magnetic response in ruthenocuprates

Ivica Zivkovic, Helmuth Berger

We have performed an investigation of the nonlinear magnetic response in ruthenocuprates. A negative, diverging-like peak at the main magnetic transition T-N in RuSr2 RECu2O8 (RE = Gd, Y) indicates a possible canted antiferromagnetic order. Another well de ...

EDP Sciences, Springer2008

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