129 citations · 448 across the 8 of their papers we have counts for
8 papers
The efficiency and the demagnetization field of a general Halbach cylinder
R. Bjørk, A. Smith, C. R. H. Bahl
The maximum magnetic efficiency of a general multipole Halbach cylinder of order is found as function of . The efficiency is shown to decrease for increasing absolute value…
Metamaterial anisotropic flux concentrators and magnetic arrays
R. Bjørk, A. Smith, C. R. H. Bahl
A metamaterial magnetic flux concentrator is investigated in detail in combination with a Halbach cylinder of infinite length. A general analytical solution to the field is determi…
Determining the minimum mass and cost of a magnetic refrigerator
R. Bjørk, A. Smith, C. R. H. Bahl +1
An expression is determined for the mass of the magnet and magnetocaloric material needed for a magnetic refrigerator and these are determined using numerical modeling for both par…
Comparison of adjustable permanent magnetic field sources
R. Bjørk, C. R. H. Bahl, A. Smith +1
A permanent magnet assembly in which the flux density can be altered by a mechanical operation is often significantly smaller than comparable electromagnets and also requires no el…
Magnetocaloric properties of LaFeCoSi and commercial grade Gd
R. Bjørk, C. R. H. Bahl, M. Katter
The magnetocaloric properties of three samples of LaFeCoSi have been measured and compared to measurements of commercial grade Gd. The samples have (x=0.86, y=1.…
An optimized magnet for magnetic refrigeration
R. Bjørk, C. R. H. Bahl, A. Smith +2
A magnet designed for use in a magnetic refrigeration device is presented. The magnet is designed by applying two general schemes for improving a magnet design to a concentric Halb…
Demagnetization factor for a powder of randomly packed spherical particles
R. Bjørk, C. R. H. Bahl
The demagnetization factors for randomly packed spherical particle powders with different porosities, sample aspect ratios and monodisperse, normal and log-normal particle size dis…
Optimization and improvement of Halbach cylinder design
R. Bjørk, C. R. H. Bahl, A. Smith +1
In this paper we describe the results of a parameter survey of a 16 segmented Halbach cylinder in three dimensions in which the parameters internal radius, $r_{\mathrm{\scriptsize{…