Hans Christian Oersted (14 August 1777 – 9 March 1851) was a Danish physicist and chemist. He is best known for discovering a relationship between electricity and magnetism, a field now known as electromagnetism."Oersted" discovered that electric currents create magnetic fields, which was the first connection found between electricity and magnetism. Oersted's law and the oersted (Oe) are named after him. He also discovered that aluminium was an element.