TLS on Laboratoire D'Electrostatique Et De Physique Du Metal letterhead, dated 12 Janvier 1917 in untranslated French. Signed at the conclusion "L. Néel" in ballpoint ink. In good condition. (1904-2000) Louis Eugène Félix Néel was a French physicist who received the Nobel Prize for Physics in 1970 for his studies of the magnetic properties of solids.Néel studied at the Lycée du Parc in Lyon and was accepted at the École Normale Supérieure in Paris. He obtained the degree of Doctor of Science at the University of Strasbourg. He was co-recipient (with the Swedish astrophysicist Hannes Alfvén) of the Nobel Prize for Physics in 1970 for his pioneering studies of the magnetic properties of solids. His contributions to solid-state physics have found numerous useful applications, particularly in the development of improved computer memory units. About 1930 he suggested that a new form of magnetic behavior might exist; called antiferromagnetism, as opposed to ferromagnetism. Above a certain temperature (the Néel temperature) this behavior stops. Néel pointed out (1948) that materials could also exist showing ferrimagnetism. Néel has also given an explanation of the weak magnetism of certain rocks, making possible the study of the history of Earth's magnetic field.He is the instigator of the Polygone Scientifique in Grenoble.The Louis Néel Medal, awarded annually by the European Geophysical Society, is named in Néel's honour.This lot came from the Jim Wiggins collection we purchased in July 2022. Jim Wiggins accumulated the most unique and valuable autograph collection over a period of 70-plus years. He obtained his collection either in person or by writing to persons of fame and notoriety. Comes with a full Letter of Authenticity from Todd Mueller Authentics.