 Samuel Jackson Barnett

Samuel Jackson Barnett demonstrated that mechanical rotation can magnetize a material, the Barnett effect. Rotation couples to the angular momentum associated with microscopic magnetic moments, producing a magnetic response without using an applied field as the driving cause. The effect connects mechanical angular momentum with magnetization and complements experiments in which a change of magnetization produces mechanical motion. It makes the magnetic moment's connection with microscopic angular momentum experimentally accessible.^[ref]

A physicist listed as professor of physics at the University of California, Los Angeles, in its 1927–1928 faculty announcement.^[ref]

Samuel Jackson Barnett, often referred to simply as S.J. Barnett, is a polyhistor known for his work in various fields, including mathematics, music, and literature. However, it's worth noting that there's limited widespread contemporary information available about him, and the name could refer to different individuals based on context or regional significance.