Barkhausenn.
/ˈbɑːkaʊz(ə)n//ˈbɑːkhaʊz(ə)n/ 1. Barkhausen effect n. the name given to the series of sudden changes in the magnetization of a substance when the magnetizing force is gradually altered.
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the world > matter > physics > electromagnetic radiation > magnetism > [noun] > magnetized condition > sudden changes in
Barkhausen effect1924
1924 E. P. T. Tyndall in Physical Rev. 24 439 Barkhausen effect for silicon steel... Barkhausen and Van der Pol consider the effect as due to the sudden re-orientation of groups or chains of molecular magnets.
1957 Encycl. Brit. XIV. 646/1 Barkhausen Effect. In 1919 H. Barkhausen discovered the effect known by his name, and interpreted it as demonstrating that the magnetization of iron proceeds by steps and not in a continuous manner.
2. Barkhausen oscillation n. (see quots.).
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1925 Chem. Abstr. 19 1659 Occurrence of Barkhausen oscillations in triodes.
1936 R. S. Glasgow Princ. Radio Engin. x. 310 (caption) Circuit for generating Barkhausen oscillations.
3. Barkhausen oscillator n. (see quots.).
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1940 Chambers's Techn. Dict. 76/2 Barkhausen oscillator, a generator of very high frequency oscillation (above 108 cps.), whose action depends on the transit time of the electrons from cathode to anode of a three-electrode valve. Barkhausen–Kurz oscillations, oscillations of very high frequency generated in a triode valve with a positive grid, the anode potential being approximately the same as the cathode. The oscillations are those of electrons passing to and fro through the grid.
1944 W. L. Emery Radio Engin. Index 284/1 Barkhausen–Kurz oscillator.
This entry has not yet been fully updated (first published 1972; most recently modified version published online March 2018).
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n.1924