Phase transitions and temperature changes of the optical absorption edge in (NH2(C2H5)2)2CoCl4 layered crystal

Kapustianyk, V.; Semak, S.; Demchenko, P.; Girnyk, I.; Eliyashevskyy, Yu.

doi:10.1080/01411594.2018.1473578

Cited by 10 publications

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“…Âiäîìî, ùî îïòè÷íà ñïåêòðîñêîïiÿ ¹ ÷óäîâèì iíñòðóìåíòîì äëÿ âèâ÷åííÿ ñòðóêòóðíèõ çìií, ïîâ'ÿçàíèõ iç äåôîðìàöi¹þ õðîìîôîðíèõ ãðóï, íàïðèêëàä êîìïëåêñiâ ïåðåõiäíèõ ìåòàëiâ [12,13]. Ìåòîþ äàíî¨ðîáîòè ¹ äîñëiäaeåííÿ òåìïåðàòóðíèõ çìií îïòè÷íîãî êðàþ ïîãëèíàííÿ êðèñòàëiâ (NH 4 ) 2 CuCl 4 •2H 2 O ç ìåòîþ îòðèìàííÿ äîäà-òêîâî¨iíôîðìàöi¨ïðî ñòðóêòóðíi çìiíè ïðè ñåãíåòîåëàñòîåëåêòðè÷íîìó ôàçîâîìó ïåðåõîäi òà âiäïîâiäíó äîìåííó ñòðóêòóðó.…”

Section: âñòóïunclassified

“…Òî÷íiñòü âèìiðþâàíü òà ñòàáiëiçàöi¨òåìïåðàòóðè â iíòåðâàëi 12-300 Ê ñòàíîâèëà ±0,1 Ê. Óñi òåìïåðàòóðíi çàëåaeíîñòi âèìiðþâàíèõ ïàðàìåòðiâ ïðåäñòàâëåíi â ðåaeèìi îõîëîäaeåííÿ. ßê áóëî ïîêàçàíî ðàíiøå [12,15], òåìïåðàòóðíà åâîëþöiÿ íèçüêîåíåðãåòè÷íî¨äiëÿíêè îïòè÷íîãî êðàþ ïîãëèíàííÿ â ñïîëóêàõ òèïó A 2 MeX 4 ç àëêiëàìîíi¹âèìè êàòiîíàìè, â òiì ÷èñëi, ïîâ'ÿçàíîãî çi ñìóãîþ ïåðåíåñåííÿ çàðÿäó, âiäïîâiäà¹ åìïiðè-÷íîìó ïðàâèëó Óðáàõà [16]:…”

Section: ìåòîäèêà åêñïåðèìåíòóunclassified

“…Î÷åâèäíî, ùî äëÿ ñïîëóê òèïó A 2 MeX 4 öåé åêñïîíåíöiàëüíèé õàðàêòåð íèçüêî-åíåðãåòè÷íî¨äiëÿíêè êðàþ âëàñíîãî ïîãëèíàííÿ ôîðìó¹òüñÿ â ðåçóëüòàòi åëåêòðîíàáî åêñèòîí-ôîíîííî¨âçà¹ìîäi¨(ÅÔÂ), ùî ïiäòâåðäaeó¹òüñÿ áàãàòüìà íàóêîâöÿìè. Ó öüîìó âèïàäêó ïàðàìåòð σ(T ) ìîaeíà ïðåäñòàâèòè ÿê [12,15]:…”

Section: îáãîâîðåííÿ ðåçóëüòàòIâunclassified

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Influence of ferroelastoelectric phase transition on the temperature evolution of the optical absorption edge of an ammonium dihydrate tetrachlorocuprate crystal

Kapustianyk¹,

Semak²,

Chornii³

2021

Visn. Lviv. Univ., Ser. Phys.

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Öÿ ðîáîòà ïðèñâÿ÷åíà äîñëiäaeåííþ òåìïåðàòóðíî¨åâîëþöi¨îïòè÷íîãî êðàþ ïîãëèíàííÿ êðèñòàëiâ (NH 4 ) 2 CuCl 4 •2H 2 O â îáëàñòi ñåãíåòîåëàñòîåëå-êòðè÷íîãî ôàçîâîãî ïåðåõîäó. Ïîêàçàíî, ùî íèçüêîåíåðãåòè÷íà äiëÿíêà êðàþ âëàñíîãî ïîãëèíàííÿ ìà¹ åêñïîíåíöiàëüíó ôîðìó i îïèñó¹òüñÿ åìïi-ðè÷íèì ïðàâèëîì Óðáàõà â äiàïàçîíi òåìïåðàòóð âèùå 200,5 Ê i íèae÷å 100 Ê. Îòðèìàíi åêñïåðèìåíòàëüíi äàíi ïiäòâåðäèëè iñíóâàííÿ ñåãíåòîåëàñòî-åëåêòðè÷íîãî ôàçîâîãî ïåðåõîäó ïðè 200,5 Ê. Íåâèêîíàííÿ ïðàâèëà Óðáàõà òðîõè íèae÷å òåìïåðàòóðè ôàçîâîãî ïåðåõîäó ïîÿñíþ¹òüñÿ ðîçñiþâàííÿì ñâiòëà íà ñåãíåòîåëàñòîåëåêòðè÷íèõ äîìåíàõ.

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Section: âñòóïunclassified

Section: ìåòîäèêà åêñïåðèìåíòóunclassified

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