Gamma irradiation effects in InBi0.8Te0.2 crystals grown by horizontal directional freezing
- Title
- Gamma irradiation effects in InBi0.8Te0.2 crystals grown by horizontal directional freezing
- Creator
- Ajayakumar C.J.; Kunjomana A.G.
- Description
- The high-energy gamma-ray irradiation treatment using Co-60 isotope offers the possibility of engineering mechanical and optoelectronic properties of InBi0.8Te0.2 crystals. Tellurium-doped indium bismuthide (InBi) crystals were prepared by horizontal directional freezing technique. Dose-dependent modifications in structure, composition and surface topographical features have been analyzed by X-ray powder diffraction, X-ray energy-dispersive analysis, transmission electron and atomic force microscopy, respectively. Dielectric constant and dielectric loss were found to increase with the cumulative dose of radiation, and a shift in the ferroelectric transition temperature (T0c0) from 405 to 410 K was observed for 25 kGy. Upon irradiation, there is an enhancement in microhardness (H0V0), yield stress (sigma; 0y0) and stiffness constant (C0110). The optical transmittance was decreased by 12.45%, resulting in a reduction in the optical band gap from 0.210 eV to 0.198 eV. These results indicate the suitability of InBi00.80Sb00.20 crystals for low-wavelength infrared applications. The Chinese Society for Metals and Springer-Verlag Berlin Heidelberg 2015.
- Source
- Acta Metallurgica Sinica (English Letters), Vol-28, No. 10, pp. 1205-1213.
- Date
- 2015-01-01
- Publisher
- Chinese Society of Metals
- Subject
- Crystal growth; Dielectric properties; Hardness; Irradiation; Optical properties
- Coverage
- Ajayakumar C.J., Department of Physics, Crystal Research Centre, Christ University, Bangalore, 560 029, India; Kunjomana A.G., Department of Physics, Crystal Research Centre, Christ University, Bangalore, 560 029, India
- Rights
- All Open Access; Bronze Open Access
- Relation
- ISSN: 10067191; CODEN: AMSIF
- Format
- Online
- Language
- English
- Type
- Article
Collection
Citation
Ajayakumar C.J.; Kunjomana A.G., “Gamma irradiation effects in InBi0.8Te0.2 crystals grown by horizontal directional freezing,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 25, 2025, https://archives.christuniversity.in/items/show/17245.