Hydrogen mediated ferromagnetism in ZnO single crystals

Details Hydrogen mediated ferromagnetism in ZnO single crystals Hydrogen mediated ferromagnetism in ZnO single crystals

2011-04-11

arxiv.org/abs/1104.1899v1

Phys. Rev. B 85, 134424 (2012)

Physics

Condensed Matter

Strongly Correlated Electrons

9 pages with 5 figures

Scientific paper

We investigated the magnetic properties of hydrogen plasma treated ZnO single crystals by SQUID magnetometry. In agreement with the expected hydrogen penetration depth we found ferromagnetic behavior located at the first 20 nm of the H-treated surface of ZnO with magnetization at saturation up to 6 emu/g at 300 K and Curie temperature T$_c$ $\gtrsim $ 400 K. In the ferromagnetic samples a hydrogen concentration of a few atomic percent in the first 20 nm surface layer was determined by nuclear reaction analysis. The saturation magnetization of H-treated ZnO increases with the concentration of hydrogen.

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