High pressure polymorphs and amorphization of upconversion host material NaY(WO4)2

Authors

Fang Hong, Center for High Pressure Science and Technology Advanced Research
Binbin Yue, Center for High Pressure Science and Technology Advanced Research
Zhenxiang Cheng, University of WollongongFollow
Martin Kunz, Lawrence Berkeley National Laboratory
Bin Chen, Center for High Pressure Science and Technology Advanced Research
Ho-Kwang Mao, Center for High Pressure Science and Technology Advanced Research

RIS ID

108997

Publication Details

Hong, F., Yue, B., Cheng, Z., Kunz, M., Chen, B. & Mao, H. (2016). High pressure polymorphs and amorphization of upconversion host material NaY(WO4)2. Applied Physics Letters, 109 (4), 1041907-1-1041907-5.

Abstract

The pressure effect on the structural change of upconversion host material NaY(WO4)2 was studied by using in-situ synchrotron X-ray diffraction. A transition from the initial scheelite phase to the M-fergusonite phase occurs near 10 GPa, and another phase transition is found near 27.5 GPa, which could be an isostructural transition without symmetry change. The sample becomes amorphous when the pressure is fully released from high pressure. This work demonstrates the possibility of synthesizing various polymorph structures for non-linear optical applications with a high pressure, chemical doping, or strained thin-film nanostructure process.