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. 2014 Aug 29;113(9):097202.
doi: 10.1103/PhysRevLett.113.097202. Epub 2014 Aug 29.

Antiferromagnonic spin transport from Y3Fe5O12 into NiO

Hailong Wang  1 , Chunhui Du  1 , P Chris Hammel  1 , Fengyuan Yang  1
Affiliations

Antiferromagnonic spin transport from Y3Fe5O12 into NiO

Hailong Wang et al. Phys Rev Lett. .

Abstract

We observe highly efficient dynamic spin injection from Y3Fe5O12 (YIG) into NiO, an antiferromagnetic (AF) insulator, via strong coupling, and robust spin propagation in NiO up to 100-nm thickness mediated by its AF spin correlations. Strikingly, the insertion of a thin NiO layer between YIG and Pt significantly enhances the spin currents driven into Pt, suggesting exceptionally high spin transfer efficiency at both YIG/NiO and NiO/Pt interfaces. This offers a powerful platform for studying AF spin pumping and AF dynamics as well as for exploration of spin manipulation in tailored structures comprising metallic and insulating ferromagnets, antiferromagnets, and nonmagnetic materials.

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