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Pregled bibliografske jedinice broj: 297366

High-spin polarized Co-doped (La, Sr)TiO_3 thin films on high-mobility SrTiO_3 substrates


Herranz, Gervasi; Basletić, Mario; Bibes, Manuel; Ranchal, Rocio; Hamzić, Amir; Jaffres, Henri; Tafra, Emil; Bouzehouane, Karim; Jacquet, E.; Contour, Jean-Pierre et al.
High-spin polarized Co-doped (La, Sr)TiO_3 thin films on high-mobility SrTiO_3 substrates // Journal of Magnetism and Magnetic Materials, 310 (2007), 2 Part 3; 2111-2113 (međunarodna recenzija, članak, znanstveni)


Naslov
High-spin polarized Co-doped (La, Sr)TiO_3 thin films on high-mobility SrTiO_3 substrates

Autori
Herranz, Gervasi ; Basletić, Mario ; Bibes, Manuel ; Ranchal, Rocio ; Hamzić, Amir ; Jaffres, Henri ; Tafra, Emil ; Bouzehouane, Karim ; Jacquet, E. ; Contour, Jean-Pierre ; Barthélémy, Agnes ; Fert, Albert

Izvornik
Journal of Magnetism and Magnetic Materials (0304-8853) 310 (2007), 2 Part 3; 2111-2113

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Spintronics; spin injection; Shubnikov-de Haas oscillations; mobility

Sažetak
We report on the magnetotransport properties and spin polarization of Co-doped (La, Sr)TiO_3 (Co-LSTO) thin films in which the host oxide is a strongly correlated metal with a high density of carriers. In order to probe the spin polarization, we have performed tunneling magnetoresistance (TMR) measurements on magnetic tunnel junctions associating Co-LSTO and Co electrodes. A large spin polarization of around 80% has been determined at low temperatures, indicating that the carriers in this system are highly spin-polarized. We also report on the planar magnetotransport experiments on Co-LSTO films grown on SrTiO_3 substrates. The electrical properties of these samples are strongly dependent on the growth conditions and large electronic mobilities as high as 10^4 cm^2/Vs at T < 10 K are observed for specimens grown at the lowest oxygen pressure. We show that this high-mobility state is three-dimensional and we relate it to the doping of the SrTiO_3 substrate with oxygen vacancies.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
119-1191458-1023 - Sustavi s prostornim i dimenzijskim ograničenjima: korelacije i spinski efekti (Amir Hamzić, )

Ustanove
Prirodoslovno-matematički fakultet, Zagreb

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus