SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "WFRF:(Dorr M) ;lar1:(miun)"

Sökning: WFRF:(Dorr M) > Mittuniversitetet

  • Resultat 1-2 av 2
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
1.
  • Rauer, R., et al. (författare)
  • Thickness dependent phase separation in La0.7Ca0.3MnO3 films
  • 2002
  • Ingår i: Applied Physics Letters. - 0003-6951 .- 1077-3118. ; 81, s. 3777-3779
  • Tidskriftsartikel (refereegranskat)abstract
    • The complex dielectric function of La0.7Ca0.3MnO3 films with various thicknesses and on different substrates was determined by the analysis of measured ellipsometric parameters. The temperature-dependent redistribution of low-energy spectral weight shows that the metallicity is developed gradually below an onset temperature that is found to depend strongly on global and local strain properties, not on film thickness alone. Importantly, the 2 nm film shows no metallic conduction but an optical charge-carrier response below 240 K. This suggests that ultrathin films are characterized by phase separation and a percolation-type transition. (C) 2002 American Institute of Physics.
  •  
2.
  • Rauer, R., et al. (författare)
  • Magneto-optical investigation of spin polarisation of La0.71Ca0.3MnO3 and La0.7Sr0.3MnO3
  • 2005
  • Ingår i: Journal of Magnetism and Magnetic Materials. ; 290, s. 948-951
  • Tidskriftsartikel (refereegranskat)abstract
    • We investigate the ferromagnetic phase of thin epitaxial films of the CMR manganites La0.7Ca0.3MnO3 and La0.7Sr0.3MnO3 by temperature-dependent spectral generalised magneto-optical ellipsometry (SGME). The phase transitions from a paramagnetic insulator to a ferromagnetic metal take place at T-C ≈ 265 K and T-C ≈ 335 K, respectively. The measurements covering a spectral range of 0.5-5eV are performed in the temperature range of 25-425 K. SGME allows a complete magneto-optical characterisation consisting of the determination of the diagonal components as well as the off-diagonal components ε(xx) of the dielectric tensor within a single measurement. Upon cooling through the Curie temperature, we observe the development of a Drude-like free-carrier response in ε(xx), indicating the release of previously bound charges. Meanwhile, ε(xx) exhibits a rising magneto-optical response. This reflects, via the increasing degree of spin polarisation of the bands involved in optical transitions, the emergence of ferromagnetism. We tentatively assign spectral features between 2.5 and 4.5 eV to transitions involving the Mn-d shell, especially the e(g) and t(2g) levels. © 2004 Elsevier B.V. All rights reserved.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 1-2 av 2
Typ av publikation
tidskriftsartikel (2)
Typ av innehåll
refereegranskat (2)
Författare/redaktör
Bäckström, Joakim (2)
Walter, T. (2)
Rubhausen, M. (2)
Rauer, R. (2)
Dorr, K. (2)
Budelmann, D. (1)
visa fler...
Neuber, G. (1)
Kunze, J. (1)
Kurfiss, M. (1)
Schilling, M. (1)
Cooper, S. L. (1)
visa färre...
Lärosäte
Mittuniversitetet  (2)Ta bort avgränsningen
Språk
Engelska (2)

År

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy