Phase change characteristics of aluminum doped Ge(2)Sb(2)Te(5) films prepared by magnetron sputtering
Aluminum-doped Ge(2)Sb(2)Te(5) (Al(x)GST) films were deposited on Si(100) substrates by co-magnetron sputtering system. The Aluminum concentrations in these films are determined by X-ray photoelectron spectroscopy (XPS). The influence of Al doping upon phase change characteristics of these Al(x)GST...
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| Veröffentlicht in: | Optics express 2007-08, Vol.15 (17), p.10584-10590 |
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| creator | Wei, Shenjin Li, Jing Wu, Xia Zhou, Peng Wang, Songyou Zheng, Yuxiang Chen, Liangyao Gan, Fuxi Zhang, Xia Li, Guohua |
| description | Aluminum-doped Ge(2)Sb(2)Te(5) (Al(x)GST) films were deposited on Si(100) substrates by co-magnetron sputtering system. The Aluminum concentrations in these films are determined by X-ray photoelectron spectroscopy (XPS). The influence of Al doping upon phase change characteristics of these Al(x)GST alloy films has been investigated by X-ray diffraction (XRD) and a temperature-regulable UVISEL(TM) typed spectroscopic ellipsometry (TRSE). With the augment of Al doping concentration, the crystalline temperatures of Al(x)GST films went up while annealing, and the face-centered-cubic (fcc) phase had high thermal stability. The reflectivity contrast of the films increases obviously, which is effective to improve the signal to noise ratio (SNR) for optical phase-change storage. |
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The Aluminum concentrations in these films are determined by X-ray photoelectron spectroscopy (XPS). The influence of Al doping upon phase change characteristics of these Al(x)GST alloy films has been investigated by X-ray diffraction (XRD) and a temperature-regulable UVISEL(TM) typed spectroscopic ellipsometry (TRSE). With the augment of Al doping concentration, the crystalline temperatures of Al(x)GST films went up while annealing, and the face-centered-cubic (fcc) phase had high thermal stability. 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The Aluminum concentrations in these films are determined by X-ray photoelectron spectroscopy (XPS). The influence of Al doping upon phase change characteristics of these Al(x)GST alloy films has been investigated by X-ray diffraction (XRD) and a temperature-regulable UVISEL(TM) typed spectroscopic ellipsometry (TRSE). With the augment of Al doping concentration, the crystalline temperatures of Al(x)GST films went up while annealing, and the face-centered-cubic (fcc) phase had high thermal stability. 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| title | Phase change characteristics of aluminum doped Ge(2)Sb(2)Te(5) films prepared by magnetron sputtering |
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