Erlend Halls take on The Hall effect History
- Slides: 12
Erlend Hall’s take on The Hall effect History, theory and applications
History Edwin Herbert Hall (1855 – 1938) • Ph. D under Prof. Henry Rowland at the Johns Hopkins University in Baltimore Maxwell’s Electricity and Magnetism (1873) • “A magnetic field acts on the conductor” Disagreement with Maxwell • Does a magnetic field act on the conductor or the current? • Prof. Edlund and Prof. Rowland G S Leadstone 1979 Phys. Educ. 14 374
History Edwin Herbert Hall (1855 – 1938) • Ph. D under Prof. Henry Rowland at the Johns Hopkins University in Baltimore Maxwell’s Electricity and Magnetism (1873) • “A magnetic field acts on the conductor” Disagreement with Maxwell • Does a magnetic field act on the conductor or the current? • Prof. Edlund and Prof. Rowland Hall E H 1879 Am. J. Math. 2 287 -92
http: //britneyspears. ac/physics/halleffect/hall. htm
Theory • http: //britneyspears. ac/physics/halleffect/hall. htm
Theory • • http: //britneyspears. ac/physics/halleffect/hall. htm G S Leadstone 1979 Phys. Educ. 14 374
Applications Measure magnetic field Compass Burglar alarm
Lee, In et al. , 2015. Temperature-dependent hall measurement of Al. Ga. N/Ga. N heterostructures on Si substrates. Journal of the Korean Physical Society, 66(1), pp. 61– 64.
The mobility decreases as the temperature is increased over the whole temperature range Carrier concentration nearly constant < 300 K and then gradually decreases. Lee, In et al. , 2015. Temperature-dependent hall measurement of Al. Ga. N/Ga. N heterostructures on Si substrates. Journal of the Korean Physical Society, 66(1), pp. 61– 64.
Sources Hall, E. H. 1879 Am. J. Math. 2 287 -92 Hepburn, C. Hall effect. Britney Spear’s Guide to Semiconductor Physics. Url: http: //britneyspears. ac/physics/halleffect/hall. htm Krupka, J. 2013 Meas. Sci. Technol. 24 062001 Leadstone, G. S. 1979 Phys. Educ. 14 374 Lee, I et al. , 2015. Korean Phys. Soc. , 66(1), pp. 61– 64.
Thank you! “I am in some respects distinctly handicapped in all my scientific endeavours, being unskilful of hand slow of apprehension. On the other hand, I am very persistent and fond of wrestling with a difficult problem in my own slow way”. - E. H. Hall G S Leadstone 1979 Phys. Educ. 14 374 http: //britneyspears. ac/physics/halleffect/hall. htm
