Point-contact Andreev-reflection spectroscopy of doped manganites: Charge carrier spin-polarization and proximity effects (Review Article)
Materials with spin-polarized charge carriers are the most demanded in the spin-electronics. Particularly requested are the so-called half-metals which have the maximum attainable value of carrier spin polarization. Doped manganites are in the list of compounds with, potentially, half-metallic pro...
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| Datum: | 2013 |
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| Hauptverfasser: | , , |
| Format: | Artikel |
| Sprache: | English |
| Veröffentlicht: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2013
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| Schriftenreihe: | Физика низких температур |
| Schlagworte: | |
| Online Zugang: | http://dspace.nbuv.gov.ua/handle/123456789/118223 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | Point-contact Andreev-reflection spectroscopy of doped manganites: Charge carrier spin-polarization and proximity effects (Review Article) / V.N. Krivoruchko, A.I. D’yachenko, V.Yu. Tarenkov // Физика низких температур. — 2013. — Т. 39, № 3. — С. 276–292. — Бібліогр.: 118 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Zusammenfassung: | Materials with spin-polarized charge carriers are the most demanded in the spin-electronics. Particularly requested
are the so-called half-metals which have the maximum attainable value of carrier spin polarization. Doped
manganites are in the list of compounds with, potentially, half-metallic properties. The point-contact (PC) Andreevreflection
(AR) spectroscopy is a robust and direct method to measure the degree of current spin polarization. In this
report, advances in PCAR spectroscopy of ferromagnetic manganites are reviewed. The experimental results obtained
on “classic” s-wave superconductor — ferromagnetic manganites PCs, as well as related theoretical models
applied to deduce the actual value of charge carrier spin-polarization, are discussed. Data obtained on “proximity affected”
contacts is also outlined. Systematic and repeatable nature of a number of principal experimental facts detected
in the AR spectrum of proximity affected contacts suggests that some new physical phenomena have been
documented here. Different models of current flow through a superconductor–half-metal ferromagnet interface, as
well as possibility of unconventional superconducting proximity effect, have been discussed. |
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