Permanent Magnets and Maximum Flux Density

sir,

Just try it, by arranging all at an angle of 90 degree ( Just like circle)

Simplest arrangement is stacked in series.

Next use soft iron to make a "C" shaped yoke with magnets on both ends of the C shape.

Best arrangement would be to try a Halbach Array:

<http://www.matchrockets.com/ether/halbach.html>

let me know your dimention of magnet and which type of magnetisation made on iot then the ans willl be mor ecurrect mail me on nayanelectronics@yahoo.co.in,nayan_electro@yahoo.com