Universität zu Köln

Zhao, Mei-Huan, Wang, Wei, Han, Yifeng ORCID: 0000-0002-7518-978X, Xu, Xueli, Sheng, Zhigao, Wang, Yaojin, Wu, Meixia, Grams, Christoph P., Hemberger, Joachim, Walker, David, Greenblatt, Martha and Li, Man-Rong ORCID: 0000-0001-8424-9134 (2019). Reversible Structural Transformation between Polar Polymorphs of Li2GeTeO6. Inorg. Chem., 58 (2). S. 1599 - 1607. WASHINGTON: AMER CHEMICAL SOC. ISSN 1520-510X

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Abstract

Li2GeTeO6 prepared at ambient pressure adopts the corundum derivative ordered ilmenite structure (rhombohedral R3). When heated at 1073 K and 3-5 GPa, the as-made Li2GeTeO6 can convert into a LiSbO3-derived Li2TiTeO6-type phase (orthorhombic Pnn2), which is the third LiSbO3-derived double A(2)BB'O-6 phase in addition to Li2TiTeO6 and Li2SnTeO6. This Pnn2 Li2GeTeO6 phase spontaneously reverts to the R3 phase if annealed up to 1023 K at ambient pressure. Although the crystal structural analyses and second harmonic generation measurements clearly demonstrate the polar nature of both the R3 and Pnn2 phases, P(E) and dielectric measurements do not show any convincing ferroelectric response. Given the large estimated spontaneous polarization (17 and 80 mu C/cm(2)), the absence of ferroelectric behavior could be attributed to the random domain distribution and leakage due to Li-ion migration.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Zhao, Mei-Huan UNSPECIFIED UNSPECIFIED UNSPECIFIED Wang, Wei UNSPECIFIED UNSPECIFIED UNSPECIFIED Han, Yifeng UNSPECIFIED orcid.org/0000-0002-7518-978X UNSPECIFIED Xu, Xueli UNSPECIFIED UNSPECIFIED UNSPECIFIED Sheng, Zhigao UNSPECIFIED UNSPECIFIED UNSPECIFIED Wang, Yaojin UNSPECIFIED UNSPECIFIED UNSPECIFIED Wu, Meixia UNSPECIFIED UNSPECIFIED UNSPECIFIED Grams, Christoph P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hemberger, Joachim UNSPECIFIED UNSPECIFIED UNSPECIFIED Walker, David UNSPECIFIED UNSPECIFIED UNSPECIFIED Greenblatt, Martha UNSPECIFIED UNSPECIFIED UNSPECIFIED Li, Man-Rong UNSPECIFIED orcid.org/0000-0001-8424-9134 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-159030
DOI:	10.1021/acs.inorgchem.8b03114
Journal or Publication Title:	Inorg. Chem.
Volume:	58
Number:	2
Page Range:	S. 1599 - 1607
Date:	2019
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	1520-510X
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Physics > Institute of Physics II
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ROOM-TEMPERATURE; MAGNETIC-PROPERTIES; OXIDES; MAGNETORESISTANCE; POLARIZATION; TELLURATES; SYMMETRY Multiple languages Chemistry, Inorganic & Nuclear Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/15903