Strong Magnetic Fields

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  • 5 x 10^-5 T: Earth
  • 5 x 10^-3 T: Refrigerator magnet
  • 1 T: Neodynium rare-earth magnet: 1 T
  • 2-3 T: Typical Hospital MRI
  • 4 T: Functional MRI
  • 8.4 T: Experimental Human MRI [REF]
  • 11-21 T: Experimental Animal MRI
11.7 T used for animal MRI: Beck et al, PMID 11755090
21.1 T used for animal MRI: Fu et al. PMID 16125429
  • 45 T: Largest continuous man-made magnet [Ref FSU magnet lab}
  • 10^8 T: Neutron Stars [Kouveliotou]
Fields above 10^5 T squeeze elecron orbitals in to cigar shapes
  • 10^11 T: Magnetars [Kouveliotou]
  • 10^13 T: Upper Limit
"No known objects in the universe can generate and maintain fields stronger than this level." [Kouveliotou]

References:

Kouveliotou, C., Duncan, R. C. Thompson, C. "Magnetars", Scientific American, Feb. 2003 http://solomon.as.utexas.edu/sciam.pdf

link to Duncan's website: http://solomon.as.utexas.edu/magnetar.html