Room temperature ferromagnetism in un-doped amorphous HfO2 nano-helix arrays
Xie Qian, Wang Wei-Peng, Xie Zheng, Zhan Peng, Li Zheng-Cao, Zhang Zheng-Jun†
Room temperature ferromagnetism in un-doped amorphous HfO2 nano-helix arrays |
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Xie Qian, Wang Wei-Peng, Xie Zheng, Zhan Peng, Li Zheng-Cao, Zhang Zheng-Jun†
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| XPS spectra: (a) O 1s core level spectra and (b) Hf 4f core level spectra of the flat film sample and the four spiral sample. Symbols are for experimental data and the solid lines are fits with Gaussian peaks. |
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