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

Journal Article · Mon Jan 25 00:00:00 EST 2016 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4939686· OSTI ID:22489360

Shafer, Padraic; N'Diaye, Alpha T.; Arenholz, Elke ^[1]; Suzuki, Y. ^[2]

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1. Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
2. Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305 (United States)

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.

• OSTI ID: 22489360
• Journal Information: Applied Physics Letters, Vol. 108, Issue 4; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

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