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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Bondarev I. A., Rautskii M. V., Varnakov S. N., Ovchinnikov S. G., Volkov N. V.
Заглавие : Magnetic field-sensitive lateral photovoltaic effect in the Fe/SiO2/p-Si hybrid structure
Коллективы : Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium, Институт физики им. Л.В. Киренского Сибирского отделения РАН
Место публикации : VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016): abstracts/ ed.: O. A. Maksimova, R. D. Ivantsov. - Krasnoyarsk: KIP RAS SB, 2016. - Ст.P4.11. - P.239. - ISBN 978-5-904603-06-9 (Шифр -478014040)
Примечания : References: 1. - This work was supported by the Russian Foundation of Basic Research, project nos. 14-02-00234
Ключевые слова (''Своб.индексиров.''): hybrid structure--magnetoresistance--lateral photovoltage
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Volkov N. V., Tarasov A. S., Rautskii M. V., Lukyanenko A. V., Varnakov S. N., Ovchinnikov S. G.
Заглавие : Magnetic-field-driven electron transport in ferromagnetic/ insulator/ semiconductor hybrid structures
Коллективы : Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium, Институт физики им. Л.В. Киренского Сибирского отделения РАН , Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund [16-42-242036, 16-42-243046]; Russian Ministry of Education and Science [16.663.2014K]
Место публикации : J. Magn. Magn. Mater.: Elsevier Science, 2017. - Vol. 440: EURO-Asian Symposium on Trends in Magnetism (EASTMAG) (AUG 15-19, 2016, Siberian Fed Univ, Krasnoyarsk, RUSSIA). - P.140-143. - ISSN 0304-8853, DOI 10.1016/j.jmmm.2016.12.092. - ISSN 1873-4766(eISSN)
Примечания : Cited References:27. - This study was supported by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund, Project nos. 16-42-242036 and 16-42-243046, the Russian Ministry of Education and Science, state assignment no. 16.663.2014K.
Предметные рубрики: SPINTRONICS
BREAKDOWN
SILICON
SPIN
Ключевые слова (''Своб.индексиров.''): hybrid structures--magnetoresistance--magnetoimpedance--photovoltage
Аннотация: Extremely large magnetotransport phenomena were found in the simple devices fabricated on base of the Me/SiO2/p-Si hybrid structures (where Me are Mn and Fe). These effects include gigantic magnetoimpedance (MI), dc magnetoresistance (MR) and the lateral magneto-photo-voltaic effect (LMPE). The MI and MR values exceed 10(6)% in magnetic field about 0.2 T for Mn/SiO2/p-Si Schottky diode. LMPE observed in Fe/SiO2/p-Si lateral device reaches the value of 10(4)% in a field of 1 T. We believe that in case with the Schottky diode MR and MI effects are originate from magnetic field influence on impact ionization process by two different ways. First, the trajectory of the electron is deflected by a magnetic field, which suppresses acquisition of kinetic energy and therefore impact ionization. Second, the magnetic field gives rise to shift of the acceptor energy levels in silicon to a higher energy. As a result, the activation energy for impact ionization significantly increases and consequently threshold voltage rises. Moreover, the second mechanism (acceptor level energy shifting in magnetic field) can be responsible for giant LMPE.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Bondarev I. A., Rautskii M. V., Yakovlev I. A., Volochaev M. N., Lukyanenko A. V., Tarasov A. S., Volkov N. V.
Заглавие : Study of the Photovoltage in Mn/SiO2/n-Si MOS Structure at Cryogenic Temperatures
Место публикации : Semiconductors. - 2019. - Vol. 53, Is. 14. - P.88-92. - ISSN 1063-7826 (ISSN), DOI 10.1134/S1063782619140045. - ISSN 1090-6479 (eISSN)
Примечания : Cited References: 27. - The work was supported by the Russian Foundation for Basic Research project no. 17-02-00302.
Предметные рубрики: NANOSTRUCTURE DEVICES
Аннотация: Lateral photovoltaic effect in metal/insulator/semiconductor hybrid structures is a significant phenomenon for spintronics, as it establishes the interplay between the optical irradiation, electronic transport and spin-dependent properties of carriers. In present work we investigated photovoltaic phenomena in Mn/SiO2/n-Si MOS structure. The sample was prepared on a single-crystal n-Si (phosphorus-doped) substrate. The SiO2 layer with thickness of 1.5 nm was formed on the substrate surface by a chemical method. Manganese film with thickness of 15nm was deposited by thermal evaporation in ultrahigh vacuum in the “Angara” chamber. It was observed that at T 45 K the values of lateral and transversal photovoltage nonmonotonically depend on the temperature and such dependences show complex behavior. Features of the photovoltage dependence on temperature, in the region above 20 K are explained by the change of carriers’ mobility and the competition between carriers’ drift velocity in the electric field of the space-charge region and their diffusion rate in the transverse and lateral directions. Below 20 K, the main contribution into the photovoltage is given by hot electrons injected from surface states levels to the conduction band. A strong magnetic field influence on the photovoltage below 20 K was observed. We associate it with the Lorenz force effect on the hot electrons, although we also don’t exclude the presence of mechanisms caused by spindependent scattering and recombination of hot electrons at occupied donor states.
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