My GCSA I need help from principia community

Warning
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This level is for you to show how
the project will be look in REAL LIFE
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1.I need list of all metals/materials
that can pass magnetic field
2.Materials that can stop magnetic field
3.Which magnet is better for my project
- N35EH ≥860 ≥2388 1170-1210 263-279 200
- Permanent Magnets
- Temporary Magnets
- Alnico
- Ceramic or Ferrite
- Electromagnets
- Samarium Cobalt (SmCo)
- Neodymium Iron Boron (NdFeB)
- PolyMagnet
- Electrical steel
4. Do you now what will happened if on Magnetic input is -1N
and second is +1N
If you don't know what the hell is -1N / +1N / 0N

This is my style of translating volume of magnetic field.
For example -1N / +1N mean the magnet have power
but if magnet is 0N this mean that the magnet don't emit
magnetic field.


-1N = S side
+1N = N side