Synthesis, structure and properties of the oxychalcogenide series A4O4TiSe4 (A=Sm, Gd, Tb, Dy, Ho, Er and Y)

Tuxworth, Andrew J.; Evans, John S. O.

doi:10.1016/j.jssc.2013.11.006

Cited by 8 publications

(10 citation statements)

References 20 publications

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“…However, these octahedra are connected by two edge-sharing OLa 3 Mn-as well as either two or four additional OLa 4 -tetrahedra along the a-axis, respectively. The framework of four units wide, edge-sharing tetrahedra forming infinite ribbons was already observed in RE 4 TiSe 4 O 4 [13,14] and oP/oA-La 2 TSe 2 O 2 (T = Fe, Mn) [8]. Frameworks with six units wide tetrahedra are, to our best knowledge, unknown so far.…”

Section: Resultsmentioning

confidence: 80%

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Flux Synthesis, Crystal Structures, and Magnetism of the Series La2n+2MnSen+2O2n+2 (n = 0–2)

Peschke

Johrendt

2017

Inorganics

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Section: Resultsmentioning

confidence: 80%

“…Beside oxyselenides with the general chemical composition above, numerous other rare-earth oxyselenides are known, for example RE 4 TiSe 4 O 4 (RE = Sm, Gd, Tb, Dy, Ho, Er, Y) [13,14] …”

Section: Introductionmentioning

confidence: 99%

Flux Synthesis, Crystal Structures, and Magnetism of the Series La2n+2MnSen+2O2n+2 (n = 0–2)

Peschke

Johrendt

2017

Inorganics

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“…This structure is very closely related to the Ln 4 O 4 TiSe 4 structure with Ti 4+ cations occupying only the M (1) sites ( Fig. 3 (b)) (Meerschaut et al, 2001b;Tuxworth and Evans, 2014). Nitsche et al, 2014 revealed the polymorphism of the Ln 2 O 2 FeSe 2 (Ln = La, Ce) systems and were able to tune the iron coordination environment with synthesis temperature.…”

Section: β-La2o2m Se2 and Related Polymorphsmentioning

confidence: 71%

The magnetic and electronic properties of oxyselenides—influence of transition metal ions and lanthanides

Stock¹,

McCabe²

2016

J. Phys.: Condens. Matter

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Magnetic oxyselenides have been a topic of research for several decades, firstly in the context of photoconductivity and thermoelectricity owing to their intrinsic semiconducting properties and ability to tune the energy gap through metal ion substitution. More recently, interest in the oxyselenides has experienced a resurgence owing to the possible relation to strongly correlated phenomena given the fact that many oxyselenides share a similar structure to unconventional superconducting pnictides and chalcogenides. The two dimensional nature of many oxyselenide systems also draws an analogy to cuprate physics where a strong interplay between unconventional electronic phases and localised magnetism has been studied for several decades. It is therefore timely to review the physics of the oxyselenides in the context of the broader field of strongly correlated magnetism and electronic phenomena. Here we review the current status and progress in this area of research with the focus on the influence of lanthanides and transition metal ions on the intertwined magnetic and electronic properties of oxyselenides. The emphasis of the review is on the magnetic properties and comparisons are made with iron based pnictide and chalcogenide systems.

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“…A similar displacement was found for Gd 4 TiSe 4 O 4 in the single‐crystal structure investigation of Meerschaut et al11 Tuxworth et al showed by a low‐temperature PXRD study that indeed Sm 4 TiSe 4 O 4 and Gd 4 TiSe 4 O 4 , the members with the largest rare‐earth ions of the series RE 4 TiSe 4 O 4 , show a phase transition at low temperatures, which could be the ordering of the displaced titanium atoms in the distorted TiSe 4 O 2 octahedra 12. They also observed a limited field of stability of these structures over the rare‐earth atom radius.…”

Section: Resultsmentioning

confidence: 99%

“…They crystallize in a new orthorhombic structure type with M Se 4 tetrahedral and M Se 4 O 2 distorted octahedral coordination of the transition metal. This structure can also be regarded as a filled variant of RE 4 TiSe 4 O 4 10–12…”

Section: Introductionmentioning

confidence: 99%

New Polymorphs of RE₂FeSe₂O₂ (RE = La, Ce)

Nitsche

Niklaus

Johrendt

2014

Zeitschrift anorg allge chemie

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New monoclinic polymorphs of RE 2 FeSe 2 O 2 (RE = La, Ce) were synthesized at 800°C in a NaI/KI flux, and characterized by single-crystal X-ray diffraction (C2/m, Z = 2). mC-La 2 FeSe 2 O 2 and mC-Ce 2 FeSe 2 O 2 represent new structures in the RE 2 FeSe 2 O 2 family, and contain iron atoms exclusively in a distorted octahedral coordination of four selenium and two oxygen atoms. Such FeSe 4 O 2 octahedra occur together with FeSe 4 -tetrahedra if the synthesis temperature in-

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Synthesis, structure and properties of the oxychalcogenide series A4O4TiSe4 (A=Sm, Gd, Tb, Dy, Ho, Er and Y)

Cited by 8 publications

References 20 publications

Flux Synthesis, Crystal Structures, and Magnetism of the Series La2n+2MnSen+2O2n+2 (n = 0–2)

Flux Synthesis, Crystal Structures, and Magnetism of the Series La2n+2MnSen+2O2n+2 (n = 0–2)

The magnetic and electronic properties of oxyselenides—influence of transition metal ions and lanthanides

New Polymorphs of RE₂FeSe₂O₂ (RE = La, Ce)

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Synthesis, structure and properties of the oxychalcogenide series A4O4TiSe4 (A=Sm, Gd, Tb, Dy, Ho, Er and Y)

Cited by 8 publications

References 20 publications

Flux Synthesis, Crystal Structures, and Magnetism of the Series La2n+2MnSen+2O2n+2 (n = 0–2)

Flux Synthesis, Crystal Structures, and Magnetism of the Series La2n+2MnSen+2O2n+2 (n = 0–2)

The magnetic and electronic properties of oxyselenides—influence of transition metal ions and lanthanides

New Polymorphs of RE2FeSe2O2 (RE = La, Ce)

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New Polymorphs of RE₂FeSe₂O₂ (RE = La, Ce)