Generation of pure spin currents via spin Seebeck effect in self-biased hexagonal ferrite thin films

Journal Article · Mon Dec 15 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4904479· OSTI ID:22395541

Li, Peng; Ellsworth, David; Chang, Houchen; Janantha, Praveen; Richardson, Daniel; Phillips, Preston; Vijayasarathy, Tarah; Wu, Mingzhong ^[1]; Shah, Faisal ^[2]

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1. Department of Physics, Colorado State University, Fort Collins, Colorado 80523 (United States)
2. Department of Electrical Engineering, University of Notre Dame, Notre Dame, Indiana 46556 (United States)

Light-induced generation of pure spin currents in a Pt(2.5 nm)/BaFe{sub 12}O{sub 19}(1.2 μm)/sapphire(0.5 mm) structure is reported. The BaFe{sub 12}O{sub 19} film had strong in-plane uniaxial anisotropy and was therefore self-biased. Upon exposure to light, a temperature difference (ΔT) was established across the BaFe{sub 12}O{sub 19} thickness that gave rise to a pure spin current in the Pt via the spin Seebeck effect. Via the inverse spin Hall effect, the spin current produced an electric voltage across one of the Pt lateral dimensions. The voltage varied with time in the same manner as ΔT and flipped its sign when the magnetization in BaFe{sub 12}O{sub 19} was reversed.

• OSTI ID: 22395541
• Journal Information: Applied Physics Letters, Vol. 105, Issue 24; Other Information: (c) 2014 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
ANISOTROPY
BARIUM COMPOUNDS
ELECTRIC POTENTIAL
FERRITES
HALL EFFECT
INTERFACES
MAGNETIZATION
PLATINUM
SAPPHIRE
SEEBECK EFFECT
SPIN
THICKNESS
THIN FILMS
VISIBLE RADIATION