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Electrical properties of epitaxial yttrium iron garnet ultrathin films at high temperatures

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dc.date.accessioned 2019-01-22T20:58:44Z
dc.date.available 2019-01-22T20:58:44Z
dc.date.issued 2018
dc.identifier.issn 2469-9950
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/149713
dc.description.abstract © 2018 American Physical Society. We report a study on the electrical properties of 19-nm-thick yttrium iron garnet (YIG) films grown by liquid phase epitaxy on gadolinium gallium garnet single crystal. The electrical conductivity and Hall coefficient are measured in the high-temperature range [300,400] K using a Van der Pauw four-point probe technique. We find that the electrical resistivity decreases exponentially with increasing temperature following an activated behavior corresponding to a band gap of Eg≈2 eV. It drops to values about 5×103Ωcm at T=400 K, thus indicating that epitaxial YIG ultrathin films behave as large gap semiconductors. We also infer the Hall mobility, which is found to be positive (p type) at 5 cm2V-1sec-1 and almost independent of temperature. We discuss the consequence for nonlocal spin transport experiments performed on YIG at room temperature and demonstrate the existence of electrical offset voltages to be disentangled from pure spin effects.
dc.relation.ispartofseries Physical Review B
dc.title Electrical properties of epitaxial yttrium iron garnet ultrathin films at high temperatures
dc.type Article
dc.relation.ispartofseries-issue 6
dc.relation.ispartofseries-volume 97
dc.collection Публикации сотрудников КФУ
dc.source.id SCOPUS24699950-2018-97-6-SID85043783867

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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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