. The Bell System technical journal . Fig. 2—The positions of the atoms and the directions of easy magnetizationin crystals of iron and of nickel. Recently much has been learned about the magnetic properties ofmaterials by a study of single crystals. Ordinary metals are composedof a great many crystals often too small to be seen easily by the nakedeye. But in the last few years methods have been found for makinglarge crystals of almost all the common metals, crystals as large as themore familiar ones of rock candy and even of quartz. Experiments onsuch crystals of iron show that they are much
. The Bell System technical journal . Fig. 2—The positions of the atoms and the directions of easy magnetizationin crystals of iron and of nickel. Recently much has been learned about the magnetic properties ofmaterials by a study of single crystals. Ordinary metals are composedof a great many crystals often too small to be seen easily by the nakedeye. But in the last few years methods have been found for makinglarge crystals of almost all the common metals, crystals as large as themore familiar ones of rock candy and even of quartz. Experiments onsuch crystals of iron show that they are much more easily magnetizedin some directions than in others. This dependence of ease of magnetization on direction is illustratedin Fig. 2 for iron and nickel in relation to the positions of the atoms in THE PHYSICAL BASIS OF FERROMAGNETISM 5 the crystals. The circles represent the positions which centers ofatoms take up on an imaginary framework or lattice. Because of thesmallness of atomic dimensions only a small fraction of the atom
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
