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Письма в Журнал экспериментальной и теоретической физики, 2005, том 82, выпуск 9, страницы 682–687
(Mi jetpl1614)
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Эта публикация цитируется в 25 научных статьях (всего в 25 статьях)
КОНДЕНСИРОВАННЫЕ СРЕДЫ
Irreversible electronic transition with possible metallization in Y$_3$Fe$_5$O$_{12}$ at high pressure
A. G. Gavriliukabc, V. V. Struzhkina, I. S. Lyubutinb, I. A. Trojana a Institute for High Pressure Physics RAS, 142190 Troitsk, Moscow region, Russia
b Institute of Crystallography RAS, 119333 Moscow, Russia
c Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road NW, Washington, DC 20015
Аннотация:
The effect of high pressure up to $70$ GPa on the optical absorption spectra in yttrium iron garnet Y$_3$Fe$_5$O$_{12}$ single crystals was studied in diamond anvil cells. In the pressure range $40\div50\,$GPa, an electronic transition with drastic decrease of optical gap from $\sim2.3\,$eV to nearly zero value was observed implying possible metallization. Final drop of the optical gap to zero is extrapolated at about $55$ GPa. It is shown that the phase transition in yttrium iron garnet observed at $40$–$55$ GPa is possibly a transition of the insulator-metal type. At decompression, back transition to insulating state is not completely reversible. Final spectrum at ambient pressure is essentially different from initial one and corresponds to the optical gap of about $1.8$ eV while in the initial state the gap value is $\sim2.6\,$eV.
Поступила в редакцию: 27.09.2005
Образец цитирования:
A. G. Gavriliuk, V. V. Struzhkin, I. S. Lyubutin, I. A. Trojan, “Irreversible electronic transition with possible metallization in Y$_3$Fe$_5$O$_{12}$ at high pressure”, Письма в ЖЭТФ, 82:9 (2005), 682–687; JETP Letters, 82:9 (2005), 603–608
Образцы ссылок на эту страницу:
https://www.mathnet.ru/rus/jetpl1614 https://www.mathnet.ru/rus/jetpl/v82/i9/p682
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Страница аннотации: | 224 | PDF полного текста: | 148 | Список литературы: | 36 |
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