An Anti CuO2‐type Metal Hydride Square Net Structure in Ln2M2As2Hx (Ln=La or Sm, M=Ti, V, Cr, or Mn)

Mizoguchi, Hiroshi; Park, SangWon; Hiraka, Haruhiro; Ikeda, Kazutaka; Otomo, Toshiya; Hosono, Hideo

doi:10.1002/anie.201409023

Cited by 14 publications

(12 citation statements)

References 20 publications

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“…The other interstitial site filled by hydrogen (or deuterium) is located in the Sc 4/2 Nd 2 octahedron. This position has been observed in the homologous phases La 2 Ti 2 As 2 H 2.3 [40],T i 2 SbD 0.5 [41] Intensity (a. u.)…”

Section: Structural Discussionsupporting

confidence: 64%

Hydrogenation studies on NdScSi and NdScGe

Tencé

Mahon

Gaudin

et al. 2016

Journal of Solid State Chemistry

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READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.http://nparc.cisti-icist.nrc-cnrc.gc.ca/eng/copyright Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/eng/view/object/?id=bdfd6936-d9f6-4f07-9806-797f96ca9512 http://nparc.cisti-icist.nrc-cnrc.gc.ca/fra/voir/objet/?id=bdfd6936-d9f6-4f07-9806-797f96ca9512 NdScSi and NdScGe were synthesized from the elements via arc-melting and subsequent annealing. Their ordered La 2 Sb type structures, with space group I4/mmm, were refined from single crystal X-ray diffractometer data: a ¼428.94(6) and b ¼1570.5(3) pm, wR2 ¼ 0.0395, 309 F 2 values for NdScSi and a ¼431.2(1) and c ¼1581.3(5) pm, wR2 ¼ 0.1220, 227 F 2 values for NdScGe, with 11 variables per refinement.Hydrogen insertion was performed on both Nd-based intermetallics by solid/gas reaction. Hydrogen uptake keeps the pristine compound space group but yields an anisotropic expansion of the unit cell with a large increase of c ( E þ7%) and a slight decrease of a ( E À 1.7%) parameters. Hydrogen absorption at 350°C and under 5 bar of H 2 pressure shows that the hydride NdScSiH 1.48(5) is formed. An in-situ neutron diffraction study during the deuteration of NdScSi reveals for the first time in a CeScSi-type compound, the possibility to fill two interstitial sites with deuterium atoms, leading to the composition NdScSiD 1.5 for the deuteride adopting then the La 2 Fe 2 Se 2 O 3 -type structure.From magnetization measurements, we evidence that hydrogenation strongly reduces the Curie temperature of NdScSi (T C ¼ 175 K) and NdScGe (T C ¼194 K) since NdScSiH 1.5 and NdScGeH x undergo a magnetic transition at 4 K and around 2 K, respectively.

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Section: Structural Discussionsupporting

confidence: 64%

Hydrogenation studies on NdScSi and NdScGe

Tencé

Mahon

Gaudin

et al. 2016

Journal of Solid State Chemistry

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“…Recently, various ATi2Pn2O-related compounds, such as pnictide oxides and chalcogenide oxides, have been found [60][61][62][63][64]. For instance, Ba2Ti2Fe2As4O is an intergrowth of BaTi2As2O and BaFe2As2 where TDW of 120 K is observed, which is lower than that in BaTi2As2O due to the interlayer charge transfer [60].…”

Section: Discussionmentioning

confidence: 99%

Titanium Pnictide Oxide Superconductors

Yajima

2017

Condensed Matter

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Abstract:In 2012, a novel superconductor BaTi 2 Sb 2 O was found in the layered titanium pnictide oxides ATi 2 Pn 2 O. A related superconductor BaTi 2 Bi 2 O was subsequently discovered in 2013. The structure of these materials consists of alternate stacking of superconducting Ti 2 Pn 2 O layers and Ba blocking layers, which is somewhat similar to high-T c cuprates since the Ti 2 Pn 2 O layer contains an anti-CuO 2 -type Ti 2 O square lattice. In addition to the structural similarity to the well-known high-T c superconductors, BaTi 2 Pn 2 O shows unique physical properties: two superconducting domes appear in the electronic phase diagram for solid solutions of BaTi 2 (Sb 1-x Bi x ) 2 O and a unique density-wave instability which coexists with superconductivity. In this short review, the early studies of titanium pnictide oxides, the discovery of novel superconductors BaTi 2 Pn 2 O, and recent progress are summarized.

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“…Mit diesem mit 50 Million Yen verbundenen Preis werden international geschätzte Wissenschaftler und Ingenieure für Arbeiten gewürdigt, die zu Frieden und Wohlstand der Menschheit beigetragen haben. 2016 geht der Preis an Steven D. Tanksley (Cornell University) und Hideo Hosono (Technische Hochschule Tokio), der Coautor von Arbeiten in der Angewandten Chemie über tetragonale gemischtanionische Schichtarsenide und in Advanced Energy Materials über gemischtvalente Zinnoxide ist. Hosono studierte an der Metropolischen Universität Tokio und promovierte dort 1982 bei Takafumi Kanazawa und Hiroshi Kawazoe.…”

Section: Ausgezeichnet …unclassified

Japan‐Preis: H. Hosono / Asahi‐Preis: S. Murai / Merck–Banyu Lectureship Award: S. Maeda

2016

Angewandte Chemie

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An Anti CuO₂‐type Metal Hydride Square Net Structure in Ln₂M₂As₂H_x (Ln=La or Sm, M=Ti, V, Cr, or Mn)

Cited by 14 publications

References 20 publications

Hydrogenation studies on NdScSi and NdScGe

Hydrogenation studies on NdScSi and NdScGe

Titanium Pnictide Oxide Superconductors

Japan‐Preis: H. Hosono / Asahi‐Preis: S. Murai / Merck–Banyu Lectureship Award: S. Maeda

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