Émile Thellier

Émile Thellier (born February 11, 1904 in Mont-en-Ternois , † May 11, 1987 in Paris ) was a French geophysicist and pioneer of rock magnetism and paleomagnetism.

Life

Thellier studied from 1924 to 1926 at the Ecole Normale Superieure de Saint-Cloud . While he then taught at a school in Bourges from 1927 to 1930 , he obtained his licentiate in physics at the Sorbonne , where he obtained a diploma for higher studies in 1931 and in 1932 the agrégation in the laboratory of Charles Maurain (1871-1967), where he was then Investigated magnetism of baked clay (with fine particles of magnetite and hematite). Since the studies of Bernard Brunhes (1906) it was known that volcanic rocks recorded the direction of the earth's magnetic field at the time of their solidification. Thellier examined this more closely in Maurois' laboratory and discovered the laws of thermoremanent magnetization (TRM). To do this, he also had to develop very precise magnetometers. In 1938 he received his doctorate on it. He then went to the Institut de Physique du Globe in Paris, where he became Maitre des conferences in 1945 and Professor in 1948. From 1954 to 1966 he was the director of the institute. In 1967 he moved to the observatory in Parc Saint-Maur in a Paris suburb, where he founded the CNRS Laboratory for Geomagnetism .

Independently of Thellier, TRM was also studied by Takeshi Nagata in Japan. In 1957 he became an officer of the Legion of Honor and in 1967 he was elected to the Académie des Sciences .

Fonts

• Sur l'aimantation des terres cuites et ses applications geophysiques, Annales de. l'Institut de Physique du Globe, Université de Paris, Volume 16: 1938, pp. 157–302 (dissertation)
• Sur les propriétés de l'aimantation thermorémanente des terres cuites. Comptes rendus de l'Académie des sciences (Paris), Volume 213, 1941, pp. 1019-1022.
• with O. Thellier: Sur les variations thermiques de l'aimantation thermorémanente des terres cuites. Comptes rendus de l'Académie des sciences (Paris), Volume 213, 1941, pp. 59-61.
• About the thermorémanence et the théorie du métamagnétisme. Comptes rendus de l'Académie des sciences (Paris), Volume 223, 1946, pp. 319-321.
• with J. Roquet: Sur des lois numériques simples, relatives à l'aimantation thermorémanente du sesquioxyde de fer rhomboédrique. Comptes rendus de l'Académie des sciences (Paris), Volume 222, 1946, pp. 1288-1290.
• with F. Rimbert: Sur l'analyse d'aimantations fossiles par action de champs magnétiques alternatifs. Comptes rendus de l'Académie des sciences (Paris), Volume 239, 1954, pp. 1399-1401.
• Propriétés magnétiques des terres cuites et des smells. Journal de Physique et le Radium, Volume 12, 1951, pp. 205-218.
• with O. Thellier: Sur l'intensité du champ magnétique terrestre dans le passé historique et géologique, Annales Géophysique, Volume 15, 1959, pp. 285–376.

literature

• David J. Dunlop , Thellier article in David Gubbins et al. a. Encyclopedia of Geomagnetism and Paleomagnetism, Springer 2007, pp. 942-945
• J. Auboin, Jean Coulomb : La vie et l'oeuvre d'Émile Thellier. La Vie des Sciences. Comptes rendus de l'Académie des sciences (Paris), Série génerale, 4 (6), 1987, pp. 607-610.