Study of Photo-Magnetic Effects and ESR in Silicon Doped with Shallow Centers Using a SQUID Magnetometer

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概要

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• Photo-magnetic (PM) effect is a change in magnetization which arises from spinreversal or orbital diamagnetism associated with optical excitation and subsequentrelaxation processes. The PM effect on shallow impurities in silicon has been studiedusing a SQUID magnetometer. The SQUID-ESR has been also carried out toelucidate the origin of the PM effects. We have attempted to interpret the experimen-tal results in terms of either the orbital diamagnetism of D states or the unthermal-ized donor spins. Consequently we conclude that the PM effect arises from the unther-malization of donor spins which is induced by the spin-exchange scattering betweendonors and photoexcited hot carriers. Based on this model, rate equation approxima-lion is discussed.[semiconductor, silicon, shallow donor, ESR, SQUID, photo-induced effect, ll neutron irradiation,divacancy,spin-lattice relaxation,spin-exchange relaxation l

• 社団法人日本物理学会の論文
• 1991-07-15

著者

• Kondo M

  Department Of Health And Welfare Nishikyushu University

• Nisida Y

  Department Of Material Physics Faculty Of Engineering Science Osaka University

• Nisida Yosio

  Department Of Material Physics Engineering Science Osaka University

• Kondo Michio

  Institute For Solid State Physics University Of Tokyo

• Nisida Yosio

  Department of Material Physics,Faculty of Engineering Science,Osaka University

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