Abram Fedorovich (or Fyodorovich) Ioffe (Russian: Абра́м Фёдорович Ио́ффе; 29 October [O.S. 17 October] 1880 – 14 October 1960) was a prominent Russian/Soviet physicist. He received the Stalin Prize (1942), the Lenin Prize (1960) (posthumously), and the Hero of Socialist Labor (1955). Ioffe was an expert in electromagnetism, radiology, crystals, high-impact physics, thermoelectricity and photoelectricity.