Impact of Li3+ ion irradiation on magnetic properties of Mn doped ZnO: correlation with defects and structural property

Ahmed, Md. A.; Neogi, S. K.; Midya, N.; Banerjee, Aritra; Bandyopadhyay, S.

doi:10.1007/s10854-018-9707-7

Cited by 3 publications

(1 citation statement)

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“…Outcome of the present work.-The role of defects in controlling optical and magnetic properties of Mn doped ZnO samples had been investigated quite extensively in the last two decades [6][7][8][11][12][13][14][15][16]26,29,33,34,45 and also in recent times. 8,10,38,43,44,[46][47][48] The present work is also dedicated in that direction and describes how defect engineering by ion irradiation could do modification in optical and magnetic properties of sol-gel spin coated Zn 0.95 Mn 0.05 O films. Defect mediated BMP model 21,23 had been used to describe the ferromagnetic interaction in these films.…”

Section: Resultsmentioning

confidence: 99%

Influence of Ion Beam Irradiation on Optical and Magnetic Properties of Transparent Mn Doped ZnO Thin Films, Suitable for Sensor Applications

Neogi

Ghosh

Banerjee

et al. 2022

ECS J. Solid State Sci. Technol.

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The present work describes modification in physical properties of Zn0.95Mn0.05O films by ion beam irradiation. Films were prepared by spin coating and annealed at 500°C. XRD patterns of these films show wurzite structure with good crystalline quality. However, low-energy irradiation could modify and induce new defect states. Characterization of those defects had been performed by analyzing the UV-Visible absorption spectroscopy and photoluminescence (PL) spectroscopy. Room-temperature PL emission of Zn0.95Mn0.05O film shows a broad UV emission and pronounced visible emission ~530 nm. At low temperature, broad UV band become more prominent; however, it is completely quenched after irradiation. For all irradiated films we noted only visible emission of comparable intensities, confined within the region 475 to 550 nm. Irradiated films are showing ferromagnetism at room temperature and most importantly the film irradiated at fluence F: 1016 ions/cm2 exhibit maximum saturation magnetic moment of 0.83 emu g-1. The magnetic response is strongly influenced by irradiation and we could say that magnetism is strongly correlated with intrinsic defects present in these films. Defect-induced formation of bound magnetic polarons actually control the ferromagnetic property of these films. These transparent ferromagnetic films could be used in optoelectronics.

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