Hendrika Johanna van Leeuwen

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Hendrika Johanna van Leeuwen (1925)

Hendrika Johanna van Leeuwen (born July 3, 1887 in 's-Gravenhage , † February 26, 1974 in Delft ) was a Dutch physicist .

Life

Together with Niels Bohr , she was the originator of the Bohr-van-Leeuwen theorem . In 1919 she published her doctoral thesis in which she discussed the subject of magnetization in classical theory under the guidance of Hendrik Lorentz and Paul Ehrenfest . She showed that in a classical system in thermal equilibrium and in the presence of magnetic and electric fields, no magnetic moment can arise - in other words: According to the rules of classical mechanics, there can be no magnetism, so that magnetism can only be explained in terms of quantum mechanics (Bohr van Leeuwen theorem).

From 1920 to 1947 she was an assistant and from 1947 to 1952 a lecturer at the Technical University of Delft .

Web links

Individual evidence

  1. ↑ a b Manfred Reitz : On the trail of time: Using scientific methods to decipher past riddles. Wiley-VCH, Weinheim 2003, p. 1776.
  2. ↑ H.-J. van Leeuwen: Problems of the electronic theory of the magnetism. (PDF) In: Le journal de physique et le radium, série VI, tome II, No December 12 , 1921, pp. 361–377 , accessed on December 4, 2013 (French).
  3. ↑ Magnetism is a quantum phenomenon! (No longer available online.) European Institute of Molecular Magnetism, archived from the original on December 3, 2013 ; accessed on December 4, 2013 . Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. @1@ 2Template: Webachiv / IABot / www.unizar.es
personal data
SURNAME Leeuwen, Hendrika Johanna van
BRIEF DESCRIPTION Dutch physicist
DATE OF BIRTH July 3, 1887
PLACE OF BIRTH 's-Gravenhage
DATE OF DEATH February 26, 1974
Place of death Delft