Positron annihilation characterization of free volume in micro- and macro-modified Cu₀.₄Co₀.₄Ni₀.₄Mn₁.₈O₄ ceramics

Positron annihilation characterization of free volume in micro- and macro-modified Cu₀.₄Co₀.₄Ni₀.₄Mn₁.₈O₄ ceramics

Klym, H. ; Ingram, A. ; Shpotyuk, O. ; Hadzaman, I. ; Solntsev, V. ; Hotra, O. ; Popov, A.I.

Тема: Low-Temperature Radiation Effects in Wide Gap Materials

Інший ID: PACS: 78.70.Bj, 71.60.+z, 81.05.Mh, 82.30.Gg

URI: http://dspace.nbuv.gov.ua/handle/123456789/129199

Посилання: Positron annihilation characterization of free volume in micro- and macro-modified Cu₀.₄Co₀.₄Ni₀.₄Mn₁.₈O₄ ceramics / H. Klym, A. Ingram, O. Shpotyuk, I. Hadzaman, V. Solntsev, O. Hotra, A.I. Popov // Физика низких температур. — 2016. — Т. 42, № 7. — С. 764-769. — Бібліогр.: 52 назв. — англ.

Підтримка: Acknowledgements: H. Klym would like to thank the support via the Project DB/KIBER (No. 0115U000446) and A.I. Popov thanks Latvian State research program IMIS2 for a funding.

Дата: 2016

Завантажень: 686

Positron annihilation characterization of free volume in micro- and macro-modified Cu₀.₄Co₀.₄Ni₀.₄Mn₁.₈O₄ ceramics

Анотація:

Free volume and pore size distribution size in functional micro and macro-micro-modified Cu₀.₄Co₀.₄Ni₀.₄Mn₁.₈O₄ ceramics are characterized by positron annihilation lifetime spectroscopy in comparison with Hg-porosimetry and scanning electron microscopy technique. Positron annihilation results are interpreted in terms of model implication positron trapping and ortho-positronium decaying. It is shown that free volume of positron traps are the same type for macro and micro modified Cu₀.₄Co₀.₄Ni₀.₄Mn₁.₈O₄ ceramics. Classic Tao-Eldrup model in spherical approximation is used to calculation of the size of nanopores smaller than 2 nm using the ortho-positronium lifetime.

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