title: Topochemical synthesis of cation ordered double perovskite oxynitrides.
abstract: Topochemical nitridation in ammonia at moderate temperatures of cation ordered Sr2FeWO6produces new antiferromagnetic double perovskite oxynitrides Sr2FeWO6-xNxwith 0 < x ≤ 1. Nitrogen introduction induces the oxidation of Fe2+to Fe3+and decreases TNfrom 38 K (x = 0) to 13 K for Sr2FeWO5N which represents the first example of a double perovskite oxynitride with both high cationic order and nitrogen content. This synthetic approach can be extended to other cation combinations expanding the possibility of new materials in the large group of double perovskites.
authors.affiliation: Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Spain. amparo.fuertes@icmab.es.
authors.forename: Roberta
authors.initials: R
authors.lastname: Ceravola
authors.forename: Judith
authors.initials: J
authors.lastname: Oró-Solé
authors.forename: Ashley P
authors.initials: AP
authors.lastname: Black
authors.forename: Clemens
authors.initials: C
authors.lastname: Ritter
authors.forename: Inés
authors.initials: I
authors.lastname: Puente Orench
authors.forename: Ignasi
authors.initials: I
authors.lastname: Mata
authors.forename: Elies
authors.initials: E
authors.lastname: Molins
authors.forename: Carlos
authors.initials: C
authors.lastname: Frontera
authors.forename: Amparo
authors.initials: A
authors.lastname: Fuertes