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Title: Gd-doped BaSnO{sub 3}: A transparent conducting oxide with localized magnetic moments

We have synthesized transparent, conducting, paramagnetic stannate thin films via rare-earth doping of BaSnO{sub 3}. Gd{sup 3+} (4f{sup 7}) substitution on the Ba{sup 2+} site results in optical transparency in the visible regime, low resistivities, and high electron mobilities, along with a significant magnetic moment. Pulsed laser deposition was used to stabilize epitaxial Ba{sub 0.96}Gd{sub 0.04}SnO{sub 3} thin films on (001) SrTiO{sub 3} substrates, and compared with Ba{sub 0.96}La{sub 0.04}SnO{sub 3} and undoped BaSnO{sub 3} thin films. Gd as well as La doping schemes result in electron mobilities at room temperature that exceed those of conventional complex oxides, with values as high as 60 cm{sup 2}/V·s (n = 2.5 × 10{sup 20 }cm{sup −3}) and 30 cm{sup 2}/V·s (n = 1 × 10{sup 20 }cm{sup −3}) for La and Gd doping, respectively. The resistivity shows little temperature dependence across a broad temperature range, indicating that in both types of films the transport is not dominated by phonon scattering. Gd-doped BaSnO{sub 3} films have a strong magnetic moment of ∼7 μ{sub B}/Gd ion. Such an optically transparent conductor with localized magnetic moments may unlock opportunities for multifunctional devices in the design of next-generation displays and photovoltaics.
Authors:
 [1] ;  [2] ; ; ;  [3] ;  [4] ;  [2]
  1. Department of Materials Science and Engineering, Stanford University, Stanford, California 94305 (United States)
  2. (United States)
  3. Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
  4. Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305 (United States)
Publication Date:
OSTI Identifier:
22489360
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 108; Journal Issue: 4; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BARIUM IONS; DOPED MATERIALS; ELECTRON MOBILITY; ENERGY BEAM DEPOSITION; EPITAXY; GADOLINIUM IONS; LASER RADIATION; MAGNETIC MOMENTS; OPACITY; OXIDES; PARAMAGNETISM; PHONONS; PHOTOVOLTAIC EFFECT; PULSED IRRADIATION; RARE EARTHS; STRONTIUM TITANATES; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0273-0400 K; THIN FILMS