Phase transitions in compounds with the Ca3Ga2Ge4O14 structure

Mill, B. V.; Maksimov, B. A.; Pisarevskii, Yu. V.; Danilova, N. P.; Pavlovska, A.; Werner, Stephan; Schneider, J.

doi:10.1134/1.1643965

Cited by 19 publications

(13 citation statements)

References 11 publications

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“…The cell is trigonal possessing the P321 space group. Many langasites have been reported to undergo phase transitions away from this symmetry with varying temperature and pressure, but few have been reported to possess alternate symmetry at ambient temperature and pressure [40,41]. On the other hand, the structures of the Co 2 þ -containing dugganites have been studied in great detail [25,26].…”

Section: Crystal Structure Of Pb 3 Temn 3 P 2 O 14mentioning

confidence: 98%

Nuclear and magnetic supercells in the multiferroic candidate: Pb3TeMn3P2O14

Silverstein

Huq

Lee

et al. 2015

Journal of Solid State Chemistry

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a b s t r a c tThe dugganites, Te 6 þ -containing members of the langasite series, have attracted recent interest due to their complex low-temperature magnetic unit cells, magnetodielectric, and potentially multiferroic properties. For Pb 2 þ -containing dugganites, a large monoclinic supercell was reported and was found to have a profound effect on the low temperature magnetism and spin excitation spectra. Pb 3 TeMn 3 P 2 O 14 is another dugganite previously shown to distort away from the canonical P321 langasite unit cell, although this supercell was never fully solved. Here we report the full crystal and magnetic structure solution of Pb 3 TeMn 3 P 2 O 14 using synchrotron x-ray and neutron diffraction data: a large trigonal supercell is observed in this material, which is believed to be the first supercell of its kind in the langasite family. Here, the magnetic structure, high-magnetic field behavior, and dielectric properties of Pb 3 TeMn 3 P 2 O 14 are presented. In addition to showing weak magnetoelectric behavior similar to other langasites, it was found that a phase transition occurs at 3 T near the antiferromagnetic transition temperature.

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Section: Crystal Structure Of Pb 3 Temn 3 P 2 O 14mentioning

confidence: 98%

Nuclear and magnetic supercells in the multiferroic candidate: Pb3TeMn3P2O14

Silverstein

Huq

Lee

et al. 2015

Journal of Solid State Chemistry

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“…The Ca-gallogermanate family (space group P321) features the layered crystal structure and various disordered sites. [10][11][12][13][14][15][16][17] Previous reports of Cr 3+ -doped materials with analogous Cagallogermanate structure (Ca 3 Ga 2 Ge 4 O 14 , Sr 3 Ca 2 Ge 4 O 14 , La 3 Ga 5 GeO 14 , La 3 Ga 5 SiO 14 ) showed that Cr 3+ ions would experience disorder-induced distributions of strong and weak crystal eld strengths, resulting in two types of luminescence being observed: sharp R-line (600-700 nm) and broad NIR (900-1300 nm) emissions. 10,18,19 Therefore, controlling the order-disorder structure is the key to tune and achieve the broadband NIR emission.…”

Section: Introductionmentioning

confidence: 99%

Ultra-broadband near-infrared luminescence of ordered–disordered multi-sited Cr3+ in La3Ga5.5Nb0.5O14:Cr3+

Zhang

2014

J. Mater. Chem. C

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“…The tetrahedra share vertices and form layers ͑CO 4 and DO 4 ͒ alternating with the layers formed by octahedra ͑BO 6 ͒ and dodecahedra along the c axis. 8 Example of Sr 3 TaGa 3 Si 2 O 14 structure is shown in Fig. 1.…”

mentioning

confidence: 99%

Piezoelectricity of A3BC3D2O14 structure crystals

Chen

Zheng

Kong

et al. 2006

Applied Physics Letters

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First-principle calculations are performed to reveal the microscopic origin of piezoelectricity of ordered crystals with A 3 BC 3 D 2 O 14 structure. The calculated piezoelectric constant e 11 and atomistic piezoelectric contribution from every single atom type in a primitive cell of Sr ͑CTGS͒ structures showed that the piezoelectricity comes mostly from one of three atoms in A positions. The percentages of the contributions from the A positions to the total internal piezoelectric constant exceed 69% in CNGS and CTGS and 81% in SNGS and STGS, respectively.

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Phase transitions in compounds with the Ca3Ga2Ge4O14 structure

Cited by 19 publications

References 11 publications

Nuclear and magnetic supercells in the multiferroic candidate: Pb3TeMn3P2O14

Nuclear and magnetic supercells in the multiferroic candidate: Pb3TeMn3P2O14

Ultra-broadband near-infrared luminescence of ordered–disordered multi-sited Cr3+ in La3Ga5.5Nb0.5O14:Cr3+

Piezoelectricity of A3BC3D2O14 structure crystals

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