Nitride tuning of lanthanide chromites. Issue 23 (26th February 2016)

• Record Type: Journal Article
• Authors: Black, Ashley P.; Johnston, Hannah E.; Oró-Solé, Judith; Bozzo, Bernat; Ritter, Clemens; Frontera, Carlos; Attfield, J. Paul; Fuertes, Amparo
• Is Part Of: Chemical communications. Volume 52:Issue 23(2016)
• Page Start: 4317
• Page End: 4320
• Publication Date: 2016-02-26
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c6cc00744a
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : LnCrO3− x N x compounds with Ln = La, Pr and Nd represent one of the few examples of chromium oxynitrides and the first chromium oxynitride perovskites. Hole-doping of LnCrO3 through O 2− /N 3− anion substitution suppresses the antiferromagnetic transition far less drastically than cation substitutions. Abstract : LnCrO3− x N x perovskites with Ln = La, Pr and Nd and nitrogen contents up to x = 0.59 have been synthesised through ammonolysis of LnCrO4 precursors. These new materials represent one of the few examples of chromium oxynitrides. Hole-doping through O 2− /N 3− anion substitution suppresses the magnetic transition far less drastically than Ln 3+ /M 2+ (M = Ca, Sr) cation substitutions because of the greater covalency of metal–nitride bonds. Hence, nitride-doping is a more benign method for doping metal oxides without suppressing electronic transitions.