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Topochemical nitridation of Sr2FeMoO6.
Ceravola, Roberta; Frontera, Carlos; Oró-Solé, Judith; Black, Ashley P; Ritter, Clemens; Mata, Ignasi; Molins, Elies; Fontcuberta, Josep; Fuertes, Amparo.
Afiliação
  • Ceravola R; Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Spain. fontcuberta@icmab.cat amparo.fuertes@icmab.es.
  • Frontera C; Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Spain. fontcuberta@icmab.cat amparo.fuertes@icmab.es.
  • Oró-Solé J; Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Spain. fontcuberta@icmab.cat amparo.fuertes@icmab.es.
  • Black AP; Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Spain. fontcuberta@icmab.cat amparo.fuertes@icmab.es.
  • Ritter C; Institut Laue-Langevin, 71 Avenue de Martyrs, Grenoble 38000, France.
  • Mata I; Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Spain. fontcuberta@icmab.cat amparo.fuertes@icmab.es and Departament de Geologia, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.
  • Molins E; Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Spain. fontcuberta@icmab.cat amparo.fuertes@icmab.es.
  • Fontcuberta J; Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Spain. fontcuberta@icmab.cat amparo.fuertes@icmab.es.
  • Fuertes A; Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Spain. fontcuberta@icmab.cat amparo.fuertes@icmab.es.
Chem Commun (Camb) ; 55(21): 3105-3108, 2019 Mar 07.
Article em En | MEDLINE | ID: mdl-30789159
The topotactic nitridation of cation ordered, tetragonal Sr2FeMoO6 in NH3 at moderate temperatures leads to cubic, Fm3[combining macron]m double perovskite oxynitride Sr2FeMoO4.9N1.1 where double-exchange interactions determine ferromagnetic order with TC ≈ 100 K. Substitution of oxide by nitride induces bond asymmetries and local electronically driven structural distortions, which combined with Fermi level lowering restricts charge itinerancy to confined regions and preclude spontaneous long-range magnetic order. Under a magnetic field, ferromagnetic correlations expand, favoring charge delocalization and a negative magnetoresistance is observed.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2019 Tipo de documento: Article
Texto completo
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2019 Tipo de documento: Article