Basic research and applications in magnetism

Several brief case histories are recounted, to show how basic scientific discoveries of new materials and phenomena are used as necessary background for the design of modern devices. The essential elements in the follow-through from the discoveries to the useful devices are listed for six subjects used as examples: 1) rare earths for permanent magnets, 2) orthoferrite domain "bubbles" for memory, 3) Faraday rotation of polarized microwave radiation, 4) magnetic properties of grain-oriented silicon steel, 5) optical properties of magnetic materials, and 6) superconducting magnets.