Photoluminescence and Raman studies in swift heavy ion irradiated polycrystalline aluminum oxide

Bulletin of materials science

Fouran Singh²  B N Lakshminarasappa¹  K R Nagabhushana¹ 

[1] Department of Physics, Jnanabharathi, Bangalore University, Bangalore 560 056, India$$Department of Physics, Jnanabharathi, Bangalore University, Bangalore 560 056, IndiaDepartment of Physics, Jnanabharathi, Bangalore University, Bangalore 560 056, India$$;Inter University Accelerator Centre, P.O. Box No. 10502, New Delhi 110 067, India$$Inter University Accelerator Centre, P.O. Box No. 10502, New Delhi 110 067, IndiaInter University Accelerator Centre, P.O. Box No. 10502, New Delhi 110 067, India$$

关键词: Al2O3;    swift heavy ions;    Raman spectra;    photoluminescence;    amorphization.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Polycrystalline aluminum oxide is synthesized by combustion technique and XRD studies of the sample revealed the ð›�?-phase. The synthesized sample is irradiated with 120 MeV swift Au⁹⁺ ions for the fluence in the range from 1 Ã�? 10¹¹ to 1 Ã�? 10¹³ ions cm^-2. A broad photoluminescence (PL) emission with peak at ∼447 nm and two sharp emissions with peak at ∼ 679 and ∼ 695 nm are observed in pristine when sample was excited with 326 nm. However, in the irradiated samples the PL intensity at ∼ 447, 679 and 695 nm decreases with increase in ion fluence. The ð›�?-Al₂O₃ gives rise to seven Raman modes with Raman intensity with peaks at ∼ 253, 396, 417, 546, 630, 842, 867 cm^-1 observed in pristine. The intensity of these modes decreases with increase in ion fluence. However, the Raman modes observed at lower fluences are found to disappear at higher fluence.

【 授权许可】

Unknown