Use the data in Table 20-4 to correlate maximum permeability with coercivity. Is there a potential trend?

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Name Ingot iron Low-carbon steel Silicon iron, unoriented Silicon iron, grain-oriented 4750 alloy 4-79 permalloy Superalloy 2V-Permendur Supermendur Metglas 2650SC Metglasª 2650S-2 MnZn ferrite MnZn ferrite NiZn ferrite Composition 99.8% Fe 99.5% Fe Fe-3% Si Fe-3% Si Fe-5% Mo-80% Ni Fe-2% V-49% Co Fe-2% V-49% Co Permeability pr Initial Maximum 150 5000 200 4000 270 8000 Fe-48% Ni 11,000 Fe-4% Mo-79% Ni 40,000 80,000 800 Fe81B13.5S13.5C2 Be78B13S9 H5C2b H5Eb K5b 1400 10,000 18,000 290 50,000 80,000 200,000 450,000 450,000 100,000 300,000 600,000 Coercivity Retentivity Bmax He (A.m-1) B, (T) (T) 80 100 60 7 2 1 0.4 0.4 16 3 2 730 80 0.77 1.20 2.00 1.46 1.35 0.09 0.12 0.25 2.14 2.14 2.01 2.01 1.55 0.80 0.78 0.78 2.30 1.61 1.56 0.40 0.44 0.33 Resistivity (un.m) 0.10 1.12 0.47 0.50 0.48 0.58 0.65 0.65 0.40 1.35 1.37 1.5 X 105 5 x 104 2 x 1012