Superconductivity in the crystallogenide LaFeSiO1−δ with squeezed FeSi layers

Autor: M. F. Hansen, J.-B. Vaney, C. Lepoittevin, F. Bernardini, E. Gaudin, V. Nassif, M.-A. Méasson, A. Sulpice, H. Mayaffre, M.-H. Julien, S. Tencé, A. Cano, P. Toulemonde

Publikováno v: npj Quantum Materials, Vol 7, Iss 1, Pp 1-8 (2022)

Abstract Pnictogens and chalcogens are both viable anions for promoting Fe-based superconductivity, and intense research activity in the related families has established a systematic correlation between the Fe-anion height and the superconducting cri

Externí odkaz: https://doaj.org/article/28b2468484a5419c997734a708e30348

Na 2 VO(HPO 4 ) 2 : an original phase solved by continuous 3D electron diffraction and powder X-ray diffraction

Autor: V. Gopal, Valerie Pralong, O. Leynaud, M. Gnanavel, C. Lepoittevin, Tristan Barbier, A. Neveu

Publikováno v: Dalton Transactions
Dalton Transactions, Royal Society of Chemistry, 2021, 50 (28), pp.9725-9734. ⟨10.1039/d1dt01548f⟩
Dalton Transactions, Royal Society of Chemistry, 2021, 50 (28), pp.9725-9734. ⟨10.1039/D1DT01548F⟩

International audience; The new phase Na 2 VO(HPO 4) 2 was synthesized by sodium/proton ion exchange between NaI and VO (H 2 PO 4) 2 in hexanol. The exchange of two protons by two sodium ions causes a structural reorganization leading to a new origin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::51e1d2c8c36209fd89ff27aca82cb31f
https://hal.archives-ouvertes.fr/hal-03451774

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Long-range ordering in the Bi1−xAexFeO3−x/2 perovskites: Bi1/3Sr2/3FeO2.67 and Bi1/2Ca1/2FeO2.75

Autor: C. Lepoittevin, Nicolas Barrier, M. Hervieu, Sylvie Malo, N. Nguyen, G. Van Tendeloo

Publikováno v: Journal of solid state chemistry

Two-ordered perovskites, Bi1/3Sr2/3FeO2.67 and Bi1/2Ca1/2FeO2.75, have been stabilized and characterized by transmission electron microscopy, Mossbauer spectroscopy and X-ray powder diffraction techniques. They both exhibit orthorhombic superstructur

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d869531b11df185598515a24cf99bd4f
https://doi.org/10.1016/j.jssc.2008.04.047

Modelling of phase transformations occurring in low activation martensitic steels

Autor: C Servant, L Gavard, J.C Brachet, C Lepoittevin, S Denis, C Boussidan

Publikováno v: Journal of Nuclear Materials. :1307-1311

The main objective of this paper is to summarize modelling of on-heating and on-cooling phase transformations occurring in Low Activation Martensitic (LAM) steels. Calculations of thermodynamic equilibrium phase fractions and kinetic aspects of phase

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::01d3271ae7d666f5cdb6b5a65a32f28c
https://doi.org/10.1016/s0022-3115(98)00197-4