Halbach magnets

reviews:

the most complete summaries are found here (both open access):

P. Blümler and H. Soltner: "Practical Concepts for Design, Construction and Application of Halbach Magnets in Magnetic Resonance" Applied Magnetic Resonance (2023) (DOI)

P. Blümler: “Magnetic Guiding with Permanent Magnets: Concept, realization and applications to nanoparticles and cells” Cells 10 (2021) 2708 (DOI);  Appendix B and E