Correlation between Te inclusions and the opto-electrical properties of CdMnTe and CdMgTe single crystals

Yu, Pengfei; Gao, Pandeng; Shao, Tingquan; Liu, Wenfei; Jiang, Biru; Liu, Chongqi; Ma, Zhefan; Zheng, Jiahong

doi:10.1016/j.jcrysgro.2021.126259

Cited by 3 publications

(2 citation statements)

References 21 publications

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“…Extended defects in floating zone samples Flux growth has been the primary form of synthesis discussed so far, but X-ray µCT can assist other synthesis approaches and crystal growth methods. Techniques involving directional solidification, such as Bridgman and floating zone, can also be affected by inclusions as well as voids and air pockets that incorporate into the grown crystal [48][49][50] . These defects impact crystal quality but can be prevented by improvements in sample preparation or changes in the growth parameters.…”

Section: Internal Voids 3dmentioning

confidence: 99%

Informing quantum materials discovery and synthesis using X-ray micro-computed tomography

et al. 2022

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The presence of inclusions, twinning, and low-angle grain boundaries, demanded to exist by the third law of thermodynamics, drive the behavior of quantum materials. Identification and quantification of these structural complexities often requires destructive techniques. X-ray micro-computed tomography (µCT) uses high-energy X-rays to non-destructively generate 3D representations of a material with micron/nanometer precision, taking advantage of various contrast mechanisms to enable the quantification of the types and number of inhomogeneities. We present case studies of µCT informing materials design of electronic and quantum materials, and the benefits to characterizing inclusions, twinning, and low-angle grain boundaries as well as optimizing crystal growth processes. We discuss recent improvements in µCT instrumentation that enable elemental analysis and orientation to be obtained on crystalline samples. The benefits of µCT as a non-destructive tool to analyze bulk samples should encourage the community to adapt this technology into everyday use for quantum materials discovery.

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Section: Internal Voids 3dmentioning

confidence: 99%

Informing quantum materials discovery and synthesis using X-ray micro-computed tomography

et al. 2022

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“…CdTe-based compounds such as (Cd,Zn)Te [ 1 , 2 , 3 , 4 ], (Cd,Zn)(Te,Se) [ 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ], (Cd,Mn)Te [ 19 , 20 , 21 , 22 , 23 , 24 ], (Cd,Mn)(Te,Se) [ 25 , 26 ], (Cd,Mg)Te [ 27 , 28 , 29 , 30 , 31 , 32 ], and Cd(Te,Se) [ 33 , 34 , 35 , 36 , 37 , 38 , 39 ] are currently being tested as materials for room-temperature X- and gamma-ray detectors. In these nuclear detectors, it is crucial to maximize the flow of radiation-induced charge carriers through the detector volume to the respective electrodes.…”

Section: Introductionmentioning

confidence: 99%

Bridgman-Grown (Cd,Mn)Te and (Cd,Mn)(Te,Se): A Comparison of Suitability for X and Gamma Detectors

Masłowska,

Kochanowska,

Sulich

et al. 2024

Sensors

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This study explores the suitability of (Cd,Mn)Te and (Cd,Mn)(Te,Se) as room-temperature X-ray and gamma-ray detector materials, grown using the Bridgman method. The investigation compares their crystal structure, mechanical and optical properties, and radiation detection capabilities. Both crystals can yield large-area single crystal samples measuring approximately 30 × 30 mm2. In low-temperature photoluminescence analysis, both materials showed defect states, and annealing in cadmium vapors effectively eliminated donor–acceptor pair luminescence in (Cd,Mn)Te but not in (Cd,Mn)(Te,Se). Moreover, harder (Cd,Mn)(Te,Se) exhibited a higher etch pit density compared to softer (Cd,Mn)Te. X-ray diffraction examination revealed uniform lattice constant distribution in both compounds, with variations at a part per million level. (Cd,Mn)Te crystals demonstrated excellent single crystal properties with narrower omega scan widths, while (Cd,Mn)(Te,Se) exhibited a high contribution of block-like structures with significantly larger misorientation angles. Spectroscopic evaluations revealed better performance of a pixelated (Cd,Mn)Te detector, in comparison to (Cd,Mn)(Te,Se), achieving a mean full width at half maximum of 14% for the 122 keV gamma peak of Co-57. The reduced performance of the (Cd,Mn)(Te,Se) detector may be attributed to deep trap-related luminescence or block-like structures with larger misorientation angles. In conclusion, Bridgman-grown (Cd,Mn)Te emerges as a more promising material for X-ray and gamma-ray detectors when compared to (Cd,Mn)(Te,Se).

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Electrophysical Properties of Cd₀.₉₆Mn₀.₀₄Te₀.₉₆Se₀.₀₄ Surface-Barrier Diodes

Sklyarchuk,

Kopach,

Fochuk

et al. 2024

IEEE Trans. Nucl. Sci.

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Correlation between Te inclusions and the opto-electrical properties of CdMnTe and CdMgTe single crystals

Cited by 3 publications

References 21 publications

Informing quantum materials discovery and synthesis using X-ray micro-computed tomography

Informing quantum materials discovery and synthesis using X-ray micro-computed tomography

Bridgman-Grown (Cd,Mn)Te and (Cd,Mn)(Te,Se): A Comparison of Suitability for X and Gamma Detectors

Electrophysical Properties of Cd₀.₉₆Mn₀.₀₄Te₀.₉₆Se₀.₀₄ Surface-Barrier Diodes

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