A study of vacancy defects related to gray tracks in KTiOPO4 (KTP) using positron annihilation | Zendy

Zhang Yang | Zendy; Jing Li | Zendy; Xingzhong Cao | Zendy; Jing Yang | Zendy; Jing Wang | Zendy; Huaidong Jiang | Zendy

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A study of vacancy defects related to gray tracks in KTiOPO4 (KTP) using positron annihilation

Author(s) -

Zhang Yang,

Jing Li,

Xingzhong Cao,

Jing Yang,

Jing Wang,

Huaidong Jiang

Publication year - 2014

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4903305

Subject(s) - vacancy defect , positron annihilation spectroscopy , doppler broadening , annihilation , materials science , spectroscopy , positron annihilation , positron , crystal (programming language) , condensed matter physics , molecular physics , chemistry , physics , electron , nuclear physics , spectral line , quantum mechanics , astronomy , computer science , programming language

For the first time to our knowledge, positron annihilation spectroscopy (PAS) was used to study vacancy defects in KTiOPO4 (KTP) single crystals. Positron annihilation lifetime spectroscopy combined with dielectric measurements identified the existence of oxygen vacancies and reflected the concentration of vacancy defects in three samples. The vacancy defects in KTP do not consist of monovacancies, but rather vacancy complexes. Doppler broadening indicates that the vacancy defects are distributed uniformly. A relationship is established where a crystal with a low oxygen vacancy concentration and a highly balanced stoichiometry has a higher resistance to gray track formation

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