Crystal Research and Technology

Cover image for Vol. 52 Issue 9

Editor: Wolfgang Neumann (Editor-in-Chief), Klaus-W. Benz (Consulting Editor)

Online ISSN: 1521-4079

Associated Title(s): physica status solidi (a), physica status solidi (b), physica status solidi (RRL) - Rapid Research Letters

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Recently Published Articles

  1. Asymmetrical Photodetection Response of Methylammonium Lead Bromide Perovskite Single Crystal

    Xin Wang, Yin Huang, Wei Lei, Qing Li, Xiaobing Zhang, Qasim Khan and Baoping Wang

    Version of Record online: 8 SEP 2017 | DOI: 10.1002/crat.201700115

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    The authors demonstrate the asymmetry in large-sized methylammonium lead bromide perovskite single crystal (MAPbBr3) by investigating its optical and transport properties in different growth channels. Photodetectors based on different channels of perovskite single crystal are fabricated, and photodetections of the channels are studied as well. The work provides useful information for photovoltaic devices based on perovskite single crystals.

  2. Basic Properties of Nd-Doped GYSGG Laser Crystal

    Shoujun Ding, Qingli Zhang, Jianqiao Luo, Wenpeng Liu, Dunlu Sun, Xiaofei Wang, Guihua Sun and Jinyun Gao

    Version of Record online: 4 SEP 2017 | DOI: 10.1002/crat.201700132

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    In this work, a Nd:GYSGG crystal with high crystalline quality was grown successfully by Czochralski method. Its mechanical properties (including hardness, fracture toughness, brittleness index and yield strength) and defects were systemically studied. The J-O calculation was applied to investigate its spectral properties. The fluorescence lifetime of 4F3/2[RIGHTWARDS ARROW]4I11/2 transition is fitted to be 221.3 μs. All of these obtained results play an important role for the practical application of the Nd:GYSGG crystal.

  3. X-Ray Reciprocal Space Mapping of MBE Grown HgCdTe on Alternative Substrates

    Imtiaz Madni, Gilberto A. Umana-Membreno, Wen Lei, Renjie Gu, Jarek Antoszewski and Lorenzo Faraone

    Version of Record online: 31 AUG 2017 | DOI: 10.1002/crat.201700167

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    Quantitative strain analysis of HgCdTe epilayers grown on a novel alternative substrate GaSb was done by reciprocal space mapping. The quality of epitaxial material grown on GaSb was analysed and compared with other substrates. X-ray reciprocal space mapping proved the correlation of the material quality with the substrate. GaSb has the potential to be a promising substrate for HgCdTe growth for the next generation of infrared detectors.

  4. Preparation of Whitening Dihydrate Gypsum and Short Columnar α-Hemihydrate Gypsum with FGD Gypsum

    Duoduo Shao, Bin Zhao, Lili Gao, Yiyi Xu, Zhiguang Wang and Jilin Cao

    Version of Record online: 29 AUG 2017 | DOI: 10.1002/crat.201700166

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    By using the dissolution-crystallization and decoloring process, with α-hemihydrate gypsum whiskers prepared in MgSO4-CaCl2-H2O solution as raw material, whitening and large prismatic dihydrate gypsum with an average length of 350μm and whiteness of 82.57% can be obtained. With dihydrate gypsum after decoloring as the raw material, short columnar α-hemihydrate gypsum with length of 100μm and the whiteness of 85.68% can be obtained. It provides a theoretical basis for enlarging the comprehensive utilization of FGD gypsum.

  5. X-Ray Diffraction and Dielectric Investigations of Ferroelectric PbZr0.958Ti0.042O3, Antiferroelectric PbZrO3 and PbHfO3 Single Crystals in Superstrong Electric Fields up to 30 MV/m

    I.N. Leontyev, O.E. Fesenko, O.A. Maslova, S.V. Posokhova and N.G. Leontyev

    Version of Record online: 29 AUG 2017 | DOI: 10.1002/crat.201700139

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    Ferroelectric phase in PbZr0.958Ti0.042O3 and antiferroelectric phase in PbZrO3 and PbHfO3 are examined via X-ray diffraction and dielectric methods in DC electric fields of 0 ≤ Е ≤ 3.0⋅107 V/m. Induced polarization Pi(E) and piezoelectric coefficient d33(Е) exhibit similar behavior for BaTiO3 and PbZr0.958Ti0.042O3 single crystals. The unit-cell parameters of antiferroelectric phases in PbZrO3 and PbHfO3 single crystals remain constant and the dielectric permittivity slightly increases with the electric field.

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