Temperature Dependence of Ms and K1 of BaFe12O19 and SrFe12O19 Single Crystals

摘要: Single crystals of BaFe12O19 and SrFe12O19 were grown in a Na2O flux. Static magnetic measurements on the two crystal types made to reveal Ms K1 as functions temperature. It was found that are practically identical over temperature range 77°K Curie point with room‐temperature value 380 G. Extrapolations absolute zero Bohr magneton numbers approximately 19.3 19.7 per molecule, respectively, while points 740° 750°K, for SrFe12O19. is 10% higher than entire range. Room values 3.25×106 3.57×106 erg/cc, Calculations basis Stoner‐Wohlfarth theory indicate intrinsic coercive force will be BeFe12O19 by about 10%. Theoretical an isotropic assembly crystallites ...