Study of ferroelectric phase transition in Pb5Ge3O11 by paramagnetic resonance of Gd3+ centres / Vazhenin V. A.,Rumyantsev E. L.,Artyomov M. Yu.,Potapov A. P. // PHASE TRANSITIONS. - 2016. - V. 89, l. 6. - P. 547-557.

ISSN/EISSN:

0141-1594 / 1029-0338

Type:

Article

Abstract:

The temperature dependence of the fine structure of trigonal paramagnetic Gd3+ centres in Pb5Ge3O11 was investigated in a wide temperature range in the vicinity of structural phase transition. The temperature dependence of the squared order parameter has been constructed based on the obtained data. It was shown that for the adequate description of its behaviour, the sixth-power term in polarization must be taken into account in the expansion of the thermodynamic potential. The orientational dependence of anomalous broadening of electron paramagnetic resonance signals in the vicinity of ferroelectric phase transition was studied. By comparison of the observed behaviour with the angular dependences of the line width that are characteristic of various broadening mechanisms, it was inferred that it can be attributed to defect induced statistical dispersion of fine structure triclinic parameters.

Author keywords:

ferroelectric phase transition; electron paramagnetic resonance; lead germanate; gadolinium CRYSTAL-STRUCTURE; LEAD GERMANATE; IONS; EPR; POLARIZATION; SRTIO3

DOI:

10.1080/01411594.2015.1075246

Web of Science ID:

ISI:000374778300002

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUN
Publisher	TAYLOR \& FRANCIS LTD
Address	4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
Language	English
EISSN	1029-0338
Keywords-Plus	CRYSTAL-STRUCTURE; LEAD GERMANATE; IONS; EPR; POLARIZATION; SRTIO3
Research-Areas	Crystallography; Physics
Web-of-Science-Categories	Crystallography; Physics, Condensed Matter
Author-Email	Vladimir.Vazhenin@urfu.ru
ResearcherID-Numbers	Potapov, Alexander/D-8599-2017 Artyomov, Mikhail/E-6909-2017
Number-of-Cited-References	31
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	4
Journal-ISO	Phase Transit.
Doc-Delivery-Number	DK2XS