Magnetic interactions in (La-Ac)T 2 X 2 systems with ThCr 2 Si 2 type crystal structure

The critical behavior of single phase Y2Fe17 melt-spun ribbons with the Th2Fe17-type crystal structure has been studied around the transition temperature (TC). This alloy undergoes a secondorder ferromagnetic (FM)-paramagnetic (PM)...

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Ge0.57Ti0.43O2: a new high-pressure material with rutile-type crystal structure

Acta Crystallographica Section E Crystallographic Communications ◽

10.1107/s2056989018008988 ◽

2018 ◽

Vol 74 (7) ◽

pp. 1010-1012 ◽

Cited By ~ 1

Author(s):

Emil Stoyanov ◽

Kurt Leinenweber ◽

Thomas L. Groy ◽

Abds-Sami Malik

Keyword(s):

Crystal Structure ◽

Solid Solution ◽

High Pressure ◽

Single Crystals ◽

Structure Type ◽

Site Symmetry ◽

Rutile Structure ◽

High Pressure And Temperature ◽

Atom Position ◽

Type Crystal

Single crystals of a GeO2–TiO2 solid solution with the corresponding composition Ge0.57Ti0.43O2 (germanium titanium tetraoxide) were obtained by devitrification of germania-titania glass at high pressure and temperature. The new compound crystallizes in the rutile structure type (space group P42/mnm), where Ge and Ti share the same position M (site symmetry m.mm), with occupancy values of 0.57 (3) and 0.43 (3), respectively, and one O-atom position (m.2m). The M site is in a sixfold O-atom coordination and, as in the original TiO2 rutile structure, an elongation of the O—M—O bonds along the c-axis direction of the coordination polyhedron and deviation of the angles from 90° lead to a decrease in the coordination symmetry from octahedral to tetragonal. The Ge and Ti atoms are fully disordered in the structure, which indicates that the rutile structure is surprisingly pliant given the differing sizes of the two cations.

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Effects of defects on the quantum efficiency of Eu2+ -doped aluminates with the magnetoplumbite-type crystal structure

Journal of Luminescence ◽

10.1016/0022-2313(76)90050-8 ◽

1976 ◽

Vol 14 (2) ◽

pp. 147-152 ◽

Cited By ~ 1

Author(s):

A.L.N. Stevels ◽

A.D.M. Schrama-de Pauw

Keyword(s):

Crystal Structure ◽

Quantum Efficiency ◽

Type Crystal

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The Effect of Hydrostatic Pressure on Crystal and Orbital Structures of LaMnO3 and LaMn0.5Ga0.5O3

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.168-169.441 ◽

2010 ◽

Vol 168-169 ◽

pp. 441-444 ◽

Cited By ~ 1

Author(s):

Liudmila E. Gonchar ◽

Anatoliy E. Nikiforov ◽

Julia V. Leskova ◽

Anton A. Firsin ◽

D.P. Kozlenko

Keyword(s):

Crystal Structure ◽

Hydrostatic Pressure ◽

Nmr Spectra ◽

Theoretical Study ◽

Magnetic Interactions ◽

Ga Doping ◽

Effect Of Hydrostatic Pressure

The crystal structure of manganite under pressure is investigated. The influence of external hydrostatical pressure is studied. The theoretical study of magnetic interactions and NMR spectra under pressure is carried out. The influence of Ga-doping is discussed.

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