In Situ Observation of Domain Structure of Molybdates Gadolinum Single Crystal by Synchrotron X-Ray Topography

YUAN Qing-Xi; XU Jun; PAN Shou-Kui; HUANG Wan-Xia; TIAN Yu-Lian; JIANG Jian-Hua

Chinese Physics C> 2001, Vol. 25> Issue(S1) : 116-120

In Situ Observation of Domain Structure of Molybdates Gadolinum Single Crystal by Synchrotron X-Ray Topography

Shanghai Institute of Optics and Fine Mechanics,CAS,Shanghai 201800,ChinaLaboratory of Solid State Microstructure,Nanjing University,Nanjing 210008,China1 Institute of High Energy Physics,CAS,Beijing 100039,China

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Abstract：
The domain structure of Gd₂(MoO₄)₃ single crystal grown by Czochralski technique was observed first using a polarizing microscope,then using the Synchrotron X-ray topography under the conditions that the temperature of the crystal piece was increased from room temperature to 200°C and to applied DC voltage was varied from 0V to 4400V.The experiment results show that there are ferroelectric and ferroelastic domains in the crystal,but these two kinds of domains all disappeared when the temperature was increased above Curie temperature and could be transformed to a single domain when the applied DC voltage was high enough.This experimental results shows us that it is possible to make periodically poled Gd₂(MoO4)₃ crystal,though the presence of ferroelastic domain.

References

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YUAN Qing-Xi, XU Jun, PAN Shou-Kui, HUANG Wan-Xia, TIAN Yu-Lian and JIANG Jian-Hua. In Situ Observation of Domain Structure of Molybdates Gadolinum Single Crystal by Synchrotron X-Ray Topography[J]. Chinese Physics C, 2001, 25(S1): 116-120.

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Received: 1900-01-01
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沈阳化工大学材料科学与工程学院沈阳 110142

In Situ Observation of Domain Structure of Molybdates Gadolinum Single Crystal by Synchrotron X-Ray Topography

Corresponding author: YUAN Qing-Xi,

Shanghai Institute of Optics and Fine Mechanics,CAS,Shanghai 201800,ChinaLaboratory of Solid State Microstructure,Nanjing University,Nanjing 210008,China1 Institute of High Energy Physics,CAS,Beijing 100039,China

Received Date: 1900-01-01

Accepted Date: 1900-01-01

Available Online: 2001-06-22

Abstract: The domain structure of Gd₂(MoO₄)₃ single crystal grown by Czochralski technique was observed first using a polarizing microscope,then using the Synchrotron X-ray topography under the conditions that the temperature of the crystal piece was increased from room temperature to 200°C and to applied DC voltage was varied from 0V to 4400V.The experiment results show that there are ferroelectric and ferroelastic domains in the crystal,but these two kinds of domains all disappeared when the temperature was increased above Curie temperature and could be transformed to a single domain when the applied DC voltage was high enough.This experimental results shows us that it is possible to make periodically poled Gd₂(MoO4)₃ crystal,though the presence of ferroelastic domain.

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In Situ Observation of Domain Structure of Molybdates Gadolinum Single Crystal by Synchrotron X-Ray Topography

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