Particles–Matrix Bond in ZnCoO:H and ZnCoAlO:H Films: Issues of Magnetism and Spin Injection : научное издание

Samoshkina Yu. E.; Rautskii M.V.; Neznakhin D.S.; Stepanova E.A.; Edelman I.S.; Chou Hsiung

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База данных: Каталог библиотеки СФУ

Библиографическое описание: Particles–Matrix Bond in ZnCoO:H and ZnCoAlO:H Films: Issues of Magnetism and Spin Injection : научное издание / Yu. E. Samoshkina, M. V. Rautskii, D. S. Neznakhin [et al.]. - Текст : непосредственный // Materials. - 2023. - Т. 16, № 10. - P. 3659. - ISSN 1996-1944, DOI 10.3390/ma16103659.

Аннотация: ZnCoO:H and ZnCoAlO:H films were synthesized by radio frequency magnetron sputtering in a (1 − x)Ar + xH2 mixed atmosphere with x = 0.2–0.5. The films contain different amounts of metallic Co particles (from 7.6% and higher) ~4–7 nm in size. The magnetic and magneto-optical (MO) behavior of the films was analyzed in combination with their structural data. The samples exhibit high values of magnetization (up to 377 emu/cm3) and MO response at room temperature. Two situations are considered: (1) the film magnetism is associated only with isolated metal particles and (2) magnetism is present both in the oxide matrix and in metal inclusions. It has been established that the formation mechanism of the magnetic structure of ZnO:Co2+ is due to the spin-polarized conduction electrons of metal particles and zinc vacancies. It was also found that in the presence of two magnetic components in the films, these components are exchange-coupled. In this case, the exchange coupling generates a high spin polarization of the films. The spin-dependent transport properties of the samples have been studied. A high value of the negative magnetoresistance of the films at room temperature (~4%) was found. This behavior was explained in terms of the giant magnetoresistance model. Thus, the ZnCoO:H and ZnCoAlO:H films with high spin polarization can be considered as sources of spin injection.

Год издания: 2023

Авторы: Samoshkina Yu. E. , Rautskii M.V. , Neznakhin D.S. , Stepanova E.A. , Edelman I.S. , Chou Hsiung

Издательство: Basel

Источник: Materials

Выпуск: Т. 16, № 10

Номера страниц: 3659

Держатель оригинала документа: Department of Applied Physics, National University of Kaohsiung, Kaohsiung 81148, China, Department of Physics, National Sun Yat-sen University, Kaohsiung 80424, China, Institute of Natural Sciences and Mathematics, Ural Federal University, 620002 Yekaterinburg, Russia, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036 Krasnoyarsk, Russia

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Particles–Matrix Bond in ZnCoO:H and ZnCoAlO:H Films: Issues of Magnetism and Spin Injection : научное издание
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