Here in the US, one can buy small neodynium magnets at any good hardware store. I bought a pkg of 3. These are about the size of a dime. The magnetic field is so strong that one cannot easily get the magnets in the stack of 3 apart from one another; I had to use a sharp knife blade to do so. I am using one to repair the door to our toaster oven. It was spring-loaded to begin with, and the springs gave out. One of those dime-sized magnets now does the trick.
My Ortofon MC2000 must have very few turns of wire on its coil, because the internal resistance is 2 ohms and the output is miniscule in terms of voltage. But it has an enormously powerful magnet structure that can lead to destruction of the suspension, if you bring any ferrous objects nearby, like a screwdriver you might use to install the cartridge, or like a platter with ferrous content, or the rotor of the coreless motor of my L07D. Such powerful magnets can exert a force on the weigh pan of certain digital scales we use for VTF, even though they are advertised to be "non-magnetic". Which of course can lead to inaccurate setting of VTF.
My Ortofon MC2000 must have very few turns of wire on its coil, because the internal resistance is 2 ohms and the output is miniscule in terms of voltage. But it has an enormously powerful magnet structure that can lead to destruction of the suspension, if you bring any ferrous objects nearby, like a screwdriver you might use to install the cartridge, or like a platter with ferrous content, or the rotor of the coreless motor of my L07D. Such powerful magnets can exert a force on the weigh pan of certain digital scales we use for VTF, even though they are advertised to be "non-magnetic". Which of course can lead to inaccurate setting of VTF.